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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Elgato Stream Deck Mini
Compact 6-key version. Perfect if you only need a few hotkey replacements.
Out of stockSoldering Iron Tip Set (5 shapes)
Replacement tips for 936/900M iron — chisel, conical, bevel, knife, fork.
Out of stockSolder Fume Extractor with HEPA Filter
Desktop fume extractor, 23W, replaceable activated-carbon HEPA filter.
2S 4A Type-C Lithium Battery Charging Module – 8.4V Step-Up Boost Charger for 18650 Lipo
[Step UP Buck Converter] 2S 4A Type-C Lithium Battery Charging Module – 8.4V Step-Up Boost Charger for 18650 The 2S 4A Type-C Lithium Battery Charging Module is a compact step-up charging board designed for charging 2-cell series (2S) 18650 Li-ion/Li-Po battery packs. It accepts a 3–6V DC input through USB Type-C and boosts the voltage to 8.4V, the required full-charge voltage for a 2S lithium battery pack. The 4A specification refers to the maximum input current version. According to available product specifications, the corresponding charging current is approximately 2.2A, rather than 4A. ⭐ Key Features Designed for 2S lithium-ion/Li-Po battery packs Suitable for 2 × 18650 cells connected in series USB Type-C input 3–6V DC input Recommended input: 3.7V / 5V Step-up/boost charging circuit 8.4V charging voltage 4A maximum input-current version Approximately 2.2A charging current Automatic recharge function Battery charging protection features Compact PCB design LED charging/status indication Suitable for DIY battery and portable-power projects 📋 Technical Specifications Product Type: 2S Lithium Battery Step-Up Charging Module Battery Configuration: 2S – 2 cells in series Compatible Battery: 3.6V/3.7V Li-ion / Li-Po Nominal Battery Pack Voltage: 7.4V Full-Charge Voltage: 8.4V Input Voltage: DC 3–6V Recommended Input: DC 3.7V / 5V Maximum Input Current: 4A Charging Current: Approximately 2.2A Charging Interface: USB Type-C Charging Mode: Constant-current / constant-voltage Board Size: Approximately 39 × 18 × 6.3mm Operating Temperature: -40°C to +85°C LED Indicators: Charging / fully charged or constant-voltage status 🔋 Charging Performance For the 2S 4A version: USB Type-C 5V → Boost Charging Module → 8.4V → 2S Battery Pack The module draws up to approximately 4A from the input, while the specified charging current is approximately 2.2A. This distinction is important when selecting the USB power adapter. 🔧 Applications 2S 18650 battery packs 7.4V Li-ion battery packs 2S Li-Po battery packs DIY power banks Portable electronics Bluetooth speaker battery systems Robotics projects Solar charging applications Electronic prototyping Portable audio equipment Electric fan projects Type-C rechargeable equipment Custom battery charging systems 🛠️ How It Works The module uses a boost/step-up charging circuit to convert the lower USB Type-C input voltage into the 8.4V charging voltage required for a 2S lithium battery pack. Example: 5V Type-C Input → Step-Up Circuit → 8.4V Charging Output → 2S 18650 Battery A 2S battery pack consists of two lithium cells connected in series: 3.7V + 3.7V = 7.4V nominal4.2V + 4.2V = 8.4V fully charged 💡 LED Indicators The module uses status indicators to show the charging condition: CR: Charging OK: Fully charged / constant-voltage stage ⚠️ Important Notes This module is intended for 2S battery packs only. Do not connect a single 18650 cell directly to the 8.4V charging output. The two cells should be properly matched and in good condition. Do not exceed the 6V maximum input voltage. A suitable Type-C power source is required to supply the necessary input current. The 4A rating is the input-current rating, not the battery charging current. The specified charging current for this 2S 4A version is approximately 2.2A. This charging module should not automatically be considered a replacement for a dedicated 2S BMS/protection board. Use appropriate battery protection where required. Check the PCB polarity and connection markings before connecting the battery. Do not short-circuit the input or output. Use properly matched lithium cells for safe and reliable charging. Keep the module adequately ventilated during higher-current operation. 📦 Package Includes 1 × 2S 4A Type-C Step-Up Boost Lithium Battery Charging Module – 8.4V
Almirah Wardrobe Switch – 250V AC 6A Momentary Push-to-Off Switch
[Mechanical Switches] Almirah Wardrobe Switch – 250V AC 6A Momentary Push-to-Off Switch The Almirah Switch is a compact single-pole momentary push-to-off switch designed for use in almirahs, cupboards, wardrobes, cabinets, and furniture lighting applications. It provides instantaneous switching action and is suitable for applications where an electrical circuit needs to be switched according to the opening or closing of a cabinet or door. The switch features a high-grade polycarbonate body and brass contacts, providing reliable electrical conduction and durability for regular use. Its compact design is intended to fit standard almirah cutouts and supports panel or surface mounting with screw-type wire terminals. With a rating of 250V AC and 6A, an IP20 protection level, and a mechanical life of more than 10,000 operations, this switch is suitable for indoor furniture and cabinet applications. ⭐ Key Features 250V AC rated voltage 6A current rating Single-pole design Momentary push-button operation Push-to-Off action Instantaneous response High-grade polycarbonate construction Brass electrical contacts Compact design for standard almirah cutouts Panel or surface mounting Screw-type wire terminals Glossy white finish Mechanical life of >10,000 operations IP20 protection RoHS compliant 📋 Technical Specifications Product Type: Almirah Switch Switch Type: Momentary Actuator Type: Push Button Circuit Type: Single Circuit Number of Poles: Single Pole Rated Voltage: 250V AC Maximum Voltage: 250V AC Current Rating: 6A Maximum Current: 6A Response Time: Instantaneous Automation Grade: Manual Material: High-Grade Polycarbonate Contact Material: Brass Wire Terminal: Screw-Type Mounting Type: Panel / Surface Mount Protection Level: IP20 Finish Type: Glossy Color: White Operating Temperature: -10°C to +50°C Temperature Range: -10°C to +50°C Mechanical Life: >10,000 Operations Insulation Resistance: 100MΩ Minimum @ 500V DC Contact Resistance: 50mΩ Stroke: Standard Push-to-Off Action Size: Compact; fits standard almirah cutout Weight: Approximately 20g Number of Modules: Single Module UV Stabilized: Normal RoHS Compliance: Yes 🔌 Operation The switch provides a push-to-off momentary action. It is designed for applications where the switch operates automatically through the physical movement of a cupboard, wardrobe, almirah, or cabinet door. 🔧 Applications Almirah Lighting Cupboard Lighting Wardrobe Lighting Cabinet Lighting Furniture Lighting Storage Cabinet Applications Office Cabinets Home Furniture Control Panels Indoor Electrical Applications 🛠️ Installation The switch can be installed using its panel or surface mounting arrangement. Fit the switch into a suitable cutout and secure it firmly. Connect the wires to the screw-type terminals with the power supply switched off during installation. 📦 Package Includes 1 × Almirah Switch – White, 250V AC 6A ⚠️ Precautions Disconnect the power supply before installation or wiring. Do not exceed the 250V AC / 6A rating. Ensure screw terminals are tightened securely. Use suitable wiring for the connected load. Intended primarily for indoor applications. IP20 protection does not provide waterproof protection. Do not use in wet or exposed outdoor environments. Replace the switch if contacts become damaged or operation becomes unreliable. ❓ Frequently Asked Questions Q: What is the voltage and current rating?A: The switch is rated for 250V AC and 6A. Q: What type of switch is it?A: It is a single-pole momentary push-to-off switch. Q: Where can it be installed?A: It is designed for almirahs, cupboards, wardrobes, cabinets, and similar furniture applications. Q: What material is used for the switch?A: The body is made from high-grade polycarbonate, with brass contacts. Q: What is the mechanical life?A: The supplied specification states a mechanical life of more than 10,000 operations.
25 Watt Soldering Iron with 3mm Tip
[Soldering Iron] 25W Soldering Iron – Deluxe Economic The 25W Soldering Iron – Deluxe Economic is a compact and practical soldering tool designed for electronics assembly, component soldering, PCB repair, circuit modifications, and general-purpose electronic work. With a 25W heating element and included 3mm spade tip, it provides a convenient solution for routine soldering applications. The soldering iron features a quick-heating element to reduce waiting time before operation. It is compatible with most standard soldering tips available on the market, making it suitable for both hobbyists and professional electronics repair work. This soldering iron is manufactured in India and may be supplied under SAMCON, Devaji, Noel, Alpine, or an equivalent manufacturer, depending on availability. ⭐ Key Features 25W power output Includes 3mm spade tip Quick-heating capability Compatible with most standard soldering tips Compact and practical design Suitable for PCB soldering and repair Durable construction for general electronics work Suitable for hobbyists, technicians, and educational use Made in India 📋 Technical Specifications Product Type: Electric Soldering Iron Model: Deluxe Economic Power Rating: 25W Tip Type: 3mm Spade Tip: 3mm Spade Tip, Pre-Installed Heating Type: Quick Heating Tip Compatibility: Most Standard Soldering Tips Manufacturer: SAMCON / Devaji / Noel / Alpine or Equivalent Country of Origin: India Application: Electronics Soldering and PCB Repair 🔧 Applications General Electronics Component Soldering PCB Assembly PCB Repair Circuit Modifications Electronics Hobby Projects DIY Electronics Educational Electronics Workshops Component Replacement Wire Soldering General Electrical & Electronic Repair 🛠️ How to Use Insert a suitable soldering tip and allow the iron to heat up. Apply solder to the heated joint and component connection to create a proper electrical and mechanical connection. After completing the work, place the soldering iron safely on a heat-resistant stand and allow it to cool before storage. 📦 Package Includes 1 × 25W Soldering Iron 1 × 3mm Spade Tip (Pre-Installed) ⚠️ Precautions The soldering tip becomes extremely hot during operation. Do not touch the heated tip or metal parts during use. Always place the soldering iron on a suitable heat-resistant stand when not in use. Use in a well-ventilated area. Wear appropriate eye protection during soldering. Keep away from children and flammable materials. Disconnect from the power supply after use. Allow the iron to cool completely before changing the tip. Lead-free solder may require higher temperatures and may not perform optimally with every 25W soldering application. ❓ Frequently Asked Questions Q: Can the 3mm spade tip be replaced?A: Yes. The supplied specification states that the soldering iron is compatible with most standard soldering tips, allowing tip replacement. Q: What safety precautions are required?A: Use the soldering iron in a well-ventilated area, use eye protection, and place it on a heat-resistant stand when not in use. Q: Is it compatible with lead-free solder?A: It can be used with lead-free solder, although lead-free soldering may require higher temperatures depending on the application.
45mm 1.75-Inch 4Ohms 3W Internal Magnet Speaker with Frame
[Speakers] 45mm Internal Magnet Speaker with Frame – 4Ω 3W 45×23×23mm The 45mm Internal Magnet Speaker with Frame (1.75-Inch) is a compact and efficient audio driver designed for DIY electronics, portable audio devices, multimedia systems, toys, alarms, intercoms, and embedded audio applications. Featuring an internal magnet structure and durable mounting frame, this speaker provides clear and stable sound output while maintaining a compact form factor. With a compact size of 45×23×23mm, 4Ω impedance, and 3W power rating, this speaker is suitable for small amplifier projects and electronic devices where space is limited. Its built-in frame allows convenient installation in custom enclosures, panels, and electronic products. ⭐ Key Features 45mm (1.75-Inch) speaker size 4Ω impedance 3W power rating Internal magnet design Durable mounting frame Compact 45×23×23mm construction Clear and stable sound output Lightweight and space-saving Suitable for low-power audio applications Easy to install in custom enclosures Ideal for DIY, repair and OEM applications 📋 Technical Specifications Product Type: Internal Magnet Speaker Speaker Size: 45mm (1.75 Inch) Dimensions: 45 × 23 × 23mm Impedance: 4Ω Power Rating: 3W Magnet Type: Internal Magnet Frame Type: With Mounting Frame Speaker Type: Dynamic Full Range Speaker Audio Type: Mini Full Range Speaker Mounting: Frame / Panel Mount Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Portable Audio Devices Bluetooth Speaker Projects Multimedia Speaker Systems Alarm Systems Toys and Sound Modules Intercom Systems Embedded Electronics Educational Electronics Kits Replacement Speaker Repairs Smart Gadgets OEM Product Manufacturing Mini Amplifier Projects 🛠️ Installation Mount the speaker securely inside the required enclosure or panel using its mounting frame. Connect it to a compatible amplifier with an output suitable for 4Ω speakers and a power rating appropriate for the 3W speaker. Proper mounting helps reduce unwanted vibration and improves overall sound performance. 📦 Package Includes 1 × 45mm Internal Magnet Speaker with Frame – 4Ω 3W ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 3W rated power. Do not apply direct DC voltage to the speaker. Ensure correct wiring polarity during installation. Avoid exposure to moisture and excessive dust. Mount securely to prevent vibration and unwanted noise. Do not apply physical pressure to the speaker cone or diaphragm. Use a compatible audio amplifier module for proper operation.
2 Inch 4 Ohms 5Watt Internal Magnet Speaker with Frame
[Speakers] 2-Inch Internal Magnet Speaker with Frame – 53×29×23mm 4Ω 5W The 2-Inch Internal Magnet Speaker with Frame is a compact and efficient audio driver designed for DIY electronics, portable audio devices, alarms, toys, embedded systems, and other space-constrained applications. Featuring an internal magnet design and durable frame construction, this speaker provides clear and balanced sound output while maintaining a compact footprint. With dimensions of 53×29×23mm, 4Ω impedance, and a 5W power rating, this speaker is suitable for small amplifier projects and electronic devices requiring a compact audio solution. The mounting frame makes installation convenient in custom enclosures and equipment. ⭐ Key Features 2-Inch compact speaker design Internal magnet structure 4Ω impedance 5W power rating Durable metal frame construction Clear and balanced sound output Compact and space-saving design Easy mounting with frame and screw slots Suitable for low and medium-power audio applications Ideal for DIY and OEM applications 📋 Technical Specifications Product Type: Dynamic Internal Magnet Speaker Speaker Size: 2 Inch Dimensions: 53 × 29 × 23mm Impedance: 4Ω Power Rating: 5W Magnet Type: Internal Magnet Magnet Material: Ferrite Shape: Rectangular Frame Type: Metal Frame Cone Material: Paper / Mylar Diaphragm depending on variant Speaker Type: Full Range / Dynamic Speaker Mounting: Frame with Screw Slots Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Portable Audio Devices Bluetooth Speaker Projects Alarm Systems Toys and Sound Modules Intercom Systems Embedded Electronics Educational Electronics Kits Replacement Speaker Repairs Smart Gadgets OEM Product Manufacturing Mini Amplifier Projects 🛠️ Installation Connect the speaker to a compatible amplifier output matching the speaker's 4Ω impedance and 5W power rating. Secure the speaker firmly using the mounting frame to reduce unwanted vibration and noise during operation. 📦 Package Includes 1 × 2-Inch Internal Magnet Speaker with Frame – 4Ω 5W ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 5W rated power. Avoid applying direct DC voltage to the speaker. Avoid exposure to moisture and excessive humidity. Mount the speaker securely before operation. Do not apply physical pressure to the speaker cone or diaphragm. Avoid short circuits at the speaker terminals. Keep the speaker away from excessive heat and magnetic interference.
802580 LiPo Battery 700mAh 3.7V High Discharge 25c for Drone
[LiPo Cell] LiPo Battery 700mAh 3.7V High Discharge 802580 3.7V Lithium Polymer Battery • 700mAh Capacity • 25C High Discharge • 802580 Cell • Molex 2.0mm 2-Pin Connector The LiPo Battery 700mAh 3.7V High Discharge 802580 is a compact and lightweight Lithium Polymer (LiPo) rechargeable battery designed for applications that require high current output in a small form factor. Built with high-quality lithium polymer cells, this battery delivers a nominal voltage of 3.7V and a 700mAh capacity, making it ideal for RC toys, drones, mini helicopters, robotics, wireless electronics, and DIY projects. With a 25C continuous discharge rating, this battery can provide rapid bursts of current for motors and other high-power devices. The battery comes with a Molex 2.0mm 2-pin connector and an integrated protection PCB, offering added safety during charging and discharging. The 802580 cell size refers to the approximate dimensions of 8.0 × 25 × 80 mm, allowing the battery to fit easily into compact electronic devices while maintaining excellent power-to-weight performance. Note: This battery is intended for high-discharge applications such as RC models and robotics. It is not recommended for long-duration low-current devices such as cameras or data loggers. ⭐ Features High-quality 3.7V 700mAh LiPo battery 25C continuous discharge capability Compact 802580 cell size Lightweight design Stable voltage output Built-in protection circuit (PCB) Pre-installed Molex 2.0mm 2-pin connector Excellent power-to-weight ratio Rechargeable and reusable Suitable for high-current applications Easy plug-and-play installation 📋 Technical Specifications Product Type: Rechargeable Lithium Polymer (LiPo) Battery Battery Chemistry: Lithium Polymer (Li-ion Polymer) Cell Size: 802580 Nominal Voltage: 3.7V Full Charge Voltage: 4.20V Typical Capacity: 700mAh Discharge Rating: 25C Continuous Dimensions: Approx. 8.0 × 25 × 80 mm Weight: Approx. 18g Connector Type: Molex 2.0mm 2-Pin Protection Circuit: Built-in PCB Protection Rechargeable: Yes 🔧 Applications Suitable for: RC Cars RC Airplanes RC Helicopters Drones & Quadcopters Robotics Projects Arduino Projects ESP32 Projects DIY Electronics Portable Devices Wireless Modules Educational Projects Electronic Prototyping Battery Replacement Projects Miniature Electronics 📦 Package Includes 1 × LiPo Battery 700mAh 3.7V High Discharge 802580 with Molex 2.0mm 2-Pin Connector ⚠️ Safety Instructions Use only LiPo-compatible chargers. Do not charge above 4.20V. Do not discharge below the recommended cut-off voltage. Do not short-circuit the battery terminals. Do not puncture, crush, or expose the battery to fire. Store partially charged in a cool, dry place when not in use. Ensure connector polarity matches your device before connection.
702035 LiPo Battery 400mAh 3.7V High Discharge 25C For Drone
[LiPo Cell] LiPo Battery 400mAh 3.7V High Discharge 702035 3.7V Lithium Polymer Battery • 400mAh Capacity • 25C High Discharge • 702035 Cell • Molex 2.0mm 2-Pin Connector The LiPo Battery 400mAh 3.7V High Discharge 702035 is a compact and lightweight Lithium Polymer (LiPo) rechargeable battery designed for applications that require high current output in a small form factor. Built with high-quality lithium polymer cells, this battery delivers a nominal voltage of 3.7V and a 400mAh capacity, making it ideal for RC toys, drones, mini helicopters, robotics, wireless electronics, and DIY projects. With a 25C continuous discharge rating, this battery can provide rapid bursts of current for motors and other high-power devices. The battery comes with a Molex 2.0mm 2-pin connector and an integrated protection PCB, offering added safety during charging and discharging. The 702035 cell size refers to the approximate dimensions of 7.0 × 20 × 35 mm, allowing the battery to fit easily into compact electronic devices while maintaining excellent power-to-weight performance. Note: This battery is intended for high-discharge applications such as RC models and robotics. It is not recommended for long-duration low-current devices such as cameras or data loggers. ⭐ Features High-quality 3.7V 400mAh LiPo battery 25C continuous discharge capability Compact 702035 cell size Lightweight design Stable voltage output Built-in protection circuit (PCB) Pre-installed Molex 2.0mm 2-pin connector Excellent power-to-weight ratio Rechargeable and reusable Suitable for high-current applications Easy plug-and-play installation 📋 Technical Specifications Product Type: Rechargeable Lithium Polymer (LiPo) Battery Battery Chemistry: Lithium Polymer (Li-ion Polymer) Cell Size: 702035 Nominal Voltage: 3.7V Full Charge Voltage: 4.20V Typical Capacity: 400mAh Discharge Rating: 25C Continuous Dimensions: Approx. 7.0 × 20 × 35 mm Weight: Approx. 12g Connector Type: Molex 2.0mm 2-Pin Protection Circuit: Built-in PCB Protection Rechargeable: Yes 🔧 Applications Suitable for: RC Cars RC Airplanes RC Helicopters Drones & Quadcopters Robotics Projects Arduino Projects ESP32 Projects DIY Electronics Portable Devices Wireless Modules Educational Projects Electronic Prototyping Battery Replacement Projects Miniature Electronics 📦 Package Includes 1 × LiPo Battery 400mAh 3.7V High Discharge 702035 with Molex 2.0mm 2-Pin Connector
ESP32-C3 Super Mini Development Board With Headers Pins
[ESP Modules] Ultra Compact • Wi-Fi & BLE 5.0 • USB Type-C • Perfect for IoT & Embedded Projects The ESP32-C3 Super Mini Development Board is a compact, feature-rich development board built around the powerful ESP32-C3 SoC from Espressif. Powered by a 32-bit RISC-V single-core processor running at up to 160MHz, it combines 2.4GHz Wi-Fi, Bluetooth 5.0 Low Energy (BLE), and low-power operation in an ultra-small form factor. Designed for IoT, smart home, wireless communication, automation, and embedded system development, the ESP32-C3 Super Mini offers 4MB Flash memory, 400KB SRAM, multiple GPIOs, ADC, PWM, UART, SPI, and I2C interfaces for connecting sensors, displays, relays, and other peripherals. The onboard USB Type-C interface simplifies programming and power supply, while the built-in USB-to-Serial functionality enables quick firmware uploading without requiring additional programmers. Fully compatible with Arduino IDE, ESP-IDF, PlatformIO, and MicroPython, it is suitable for beginners, students, makers, and professional developers. Its ultra-compact breadboard-friendly design makes it ideal for portable and space-constrained projects where performance, wireless connectivity, and energy efficiency are essential. Note: Programming, software configuration, driver installation, firmware flashing, and coding-related issues are not covered under return or replacement. Users are expected to troubleshoot software-related issues independently. ⭐ Features Powerful ESP32-C3 32-bit RISC-V processor CPU frequency up to 160MHz Built-in 2.4GHz Wi-Fi (802.11 b/g/n) Integrated Bluetooth 5.0 Low Energy (BLE) Ultra-compact Super Mini design Breadboard-friendly layout USB Type-C interface for programming and power 4MB onboard Flash memory 400KB SRAM Multiple GPIO, ADC, PWM, UART, SPI & I2C interfaces Low power consumption with Deep Sleep mode Onboard programmable LED Compatible with Arduino IDE, ESP-IDF, PlatformIO & MicroPython Ideal for IoT, automation, robotics, and wireless applications 📋 Technical Specifications Product Type: Development Board Board Model: ESP32-C3 Super Mini Microcontroller: ESP32-C3 Processor Architecture: 32-bit RISC-V CPU Frequency: Up to 160MHz Core: Single Core Flash Memory: 4MB SRAM: 400KB Wi-Fi Standard: IEEE 802.11 b/g/n (2.4GHz) Bluetooth: Bluetooth 5.0 Low Energy (BLE) Operating Voltage: 3.3V Input Voltage: 5V via USB Type-C or 3.3V External USB Interface: USB Type-C GPIO: Multiple Digital GPIO Pins Analog Input: Up to 6 ADC Channels PWM: Supported UART: Supported SPI: Supported I2C: Supported USB-to-Serial: Onboard Onboard LED: User Programmable (GPIO8) Power Consumption: Ultra Low (Deep Sleep ≈ 43µA) Dimensions: Approx. 22.5 × 18 mm Headers: Pre-Soldered 🔧 Applications Suitable for: Internet of Things (IoT) Smart Home Automation Wireless Sensor Networks Home Automation Systems Bluetooth Low Energy Devices Wi-Fi Enabled Controllers Robotics Projects Data Logging Systems Remote Monitoring Industrial Automation Portable Embedded Devices Educational Learning DIY Electronics Projects Wearable Electronics Rapid Prototyping 📦 Package Includes 1 × ESP32-C3 Super Mini Development Board Pin Headers ⚠️ Note Programming, firmware installation, software configuration, and driver-related issues are not covered under warranty, return, or replacement. Please verify board compatibility and install the appropriate development environment before programming. Soldered and non-soldered header pin depend on stock
Digital Multimeter Test Leads with Ultra Sharp Needle Probe & Banana Plug CAT III 1000V 10A for SMD
[Hook up wire] The Digital Multimeter Test Lead Kit is a high-quality replacement probe set designed for accurate electrical measurements and electronic troubleshooting. Featuring ultra-sharp stainless steel needle probes, these leads allow easy access to miniature IC pins, SMD components, PCB tracks, LEDs, and other small electronic devices without causing damage. The probes are fitted with standard 4mm banana plug connectors, making them compatible with most digital multimeters, clamp meters, bench meters, and testing equipment from brands such as Fluke, Extech, Mastech, Uni-T, Victor, Sanwa, and many more. Constructed using high-quality PVC insulated cables and durable metal probes, the leads provide excellent flexibility, low resistance, and long service life. The CAT III safety rating ensures safe operation up to 1000V with a maximum current rating of 10A, making them suitable for both electronics and electrical testing. The built-in protective finger guards improve operator safety, while the flexible cables remain tangle-free during continuous testing. These probes are ideal for laboratory work, electronics repair, field service, educational laboratories, industrial maintenance, and DIY electronics projects. 🔹 Key Features Ultra-sharp stainless steel needle probes Standard 4mm banana plug connectors CAT III 1000V safety rating Maximum current rating: 10A Flexible PVC insulated cables Accurate low-resistance measurements Comfortable insulated probe handles Durable construction for long service life Compatible with most digital multimeters Ideal for PCB, SMD, IC and electrical testing 🔹 Technical Specifications Product Type: Digital Multimeter Test Leads Probe Type: Ultra Sharp Needle Probe Probe Colors: Red & Black Connector Type: 4mm Banana Plug Cable Material: PVC Insulated Probe Material: Stainless Steel / Metal Cable Length: Approx. 83cm Total Length: Approx. 103cm Maximum Current: 10A Maximum Voltage: 1000V Safety Rating: CAT III 1000V Measurement Type: Voltage, Current, Resistance, Continuity Compatibility: Most Digital Multimeters 🔹 Compatible With Fluke Multimeters Extech Multimeters Mastech Multimeters UNI-T Multimeters Victor Multimeters Sanwa Multimeters DT830 Series DT9205 Series Most multimeters with 4mm banana sockets 🔹 Applications Suitable for: Digital multimeters PCB testing SMD component testing IC pin testing LED testing Continuity testing Voltage measurement Current measurement Electronics repair Laboratory testing Industrial maintenance DIY electronics projects 🔹 Package Includes 1 × Red Multimeter Test Lead 1 × Black Multimeter Test Lead
Electric Kettle Thermostat Switch T125 16A 250V Automatic Thermal Cut-Off Switch White
[Mechanical Switches] The Electric Kettle Thermostat Switch T125 is a high-quality temperature control switch used in electric kettles and various heating appliances. It incorporates a precision bimetal thermostat that senses temperature and automatically disconnects the heating element once the desired temperature is reached, helping prevent overheating and dry-boil conditions. Manufactured with heat-resistant engineering plastic and durable silver alloy contacts, the thermostat offers stable switching performance, excellent electrical reliability, and a long mechanical life. The white housing provides excellent heat resistance, electrical insulation, and durability for continuous use in household appliances. With a 16A current rating and 250V AC operating voltage, the thermostat is suitable for most standard electric kettles, hot water dispensers, electric boilers, and similar heating equipment. Its compact design allows quick installation and easy replacement of worn or damaged thermostat switches. 🔹 Key Features Automatic temperature control Built-in overheat protection Dry-boil safety protection Precision bimetal thermostat Rated for 16A current Heat-resistant white housing Silver alloy electrical contacts Stable and reliable switching performance Long electrical and mechanical life Easy installation and replacement 🔹 Technical Specifications Product Type: Electric Kettle Thermostat Switch Model: T125 Rated Voltage: 250V AC Rated Current: 16A Temperature Rating: T125 Switching Type: Automatic Thermal Cut-Off Contact Type: Normally Closed (NC) Reset Type: Automatic (Application Dependent) Mounting Type: Screw Mount Terminal Type: Quick Connect Terminals Housing Material: Heat-Resistant Engineering Plastic Housing Color: White Contact Material: Silver Alloy Operating Frequency: 50/60Hz Operating Temperature: Up to 125°C Ambient Rating 🔹 Applications Suitable for: Electric kettles Electric water boilers Tea makers Coffee makers Hot water dispensers Steam appliances Water heating equipment Household appliances Appliance repair and replacement 🔹 Package Includes 1 × Electric Kettle Thermostat Switch T125 16A White
Electric Kettle Thermostat Switch T125 16A 250V Automatic Thermal Cut-Off Switch Black
[Mechanical Switches] The Electric Kettle Thermostat Switch T125 is a high-quality temperature control switch used in electric kettles and various heating appliances. It incorporates a precision bimetal thermostat that senses temperature and automatically disconnects the heating element once the desired temperature is reached, helping prevent overheating and dry-boil conditions. Manufactured with heat-resistant engineering plastic and durable silver alloy contacts, the thermostat offers stable switching performance, excellent electrical reliability, and a long mechanical life. The black housing provides excellent heat resistance and durability for continuous use in household appliances. With a 16A current rating and 250V AC operating voltage, the thermostat is suitable for most standard electric kettles, hot water dispensers, electric boilers, and similar heating equipment. Its compact design allows quick installation and easy replacement of worn or damaged thermostat switches. 🔹 Key Features Automatic temperature control Built-in overheat protection Dry-boil safety protection High-quality bimetal thermostat Rated for 16A current Heat-resistant black housing Silver alloy electrical contacts Stable and reliable switching Long electrical and mechanical life Easy installation and replacement 🔹 Technical Specifications Product Type: Electric Kettle Thermostat Switch Model: T125 Rated Voltage: 250V AC Rated Current: 16A Temperature Rating: T125 Switching Type: Automatic Thermal Cut-Off Contact Type: Normally Closed (NC) Reset Type: Automatic (Application Dependent) Mounting Type: Screw Mount Terminal Type: Quick Connect Terminals Housing Material: Heat-Resistant Plastic Housing Color: Black Contact Material: Silver Alloy Operating Frequency: 50/60Hz Operating Temperature: Up to 125°C Ambient Rating 🔹 Applications Suitable for: Electric kettles Electric water boilers Tea makers Coffee makers Hot water dispensers Steam appliances Water heating equipment Household appliances Appliance repair and replacement 🔹 Package Includes 1 × Electric Kettle Thermostat Switch T125 16A Black
3V 100mA LED Filament 45mm COB Edison Bulb Filament
[COB LED] The 3V 100mA LED Filament 45mm is a flexible COB LED light source designed for decorative lighting, Edison bulb restoration, DIY lamps, and creative illumination projects. Available in a variety of colors, it delivers bright and uniform light output while maintaining low power consumption. In addition, the filament provides 360-degree illumination, closely replicating the appearance of traditional Edison-style incandescent filaments. As a result, it is widely used in decorative bulbs, custom lighting fixtures, model lighting, art installations, and creative electronics projects. Because of its flexible substrate design, the filament can be slightly bent to fit custom enclosures and unique lighting arrangements. Furthermore, it produces minimal heat during operation, making it safe for compact and enclosed lighting applications. The advanced COB LED structure ensures consistent brightness, excellent efficiency, and long service life. Moreover, the solderable metal terminals allow quick integration into DIY electronics and lighting projects. 🔹 Key Features Available in multiple colors Bright and uniform light output COB LED filament design Low power consumption Excellent energy efficiency Minimal heat generation 360° illumination pattern Lightweight and compact structure Easy solderable metal terminals Long operational life 🔹 Technical Specifications Product Type: COB LED Filament Operating Voltage: 2.8V to 3.2V DC Rated Voltage: 3V DC Forward Current: 100mA (Maximum) Power Consumption: Approximately 0.3W Brightness: Approximately 80–100 Lumens per Watt Filament Type: COB (Chip-on-Board) LED Filament Base Material: Flexible Polymer Substrate Connection Type: Solderable Metal End-Caps led Length: 45mm Total Length: 55mm Filament Diameter: Approximately 2.0mm Terminal Size: Approximately 2mm × 2mm Weight: Less than 1g Available Colors: Warm White, Cool White, Red, Blue, Green (subject to availability) 🔹 Mechanical Specifications Filament construction Durable polymer substrate Highly resistant to mechanical shock Lightweight design Easy soldering connection terminals Suitable for custom lamp and lighting assemblies 🔹 Applications This LED filament is suitable for: Edison bulb repair and replacement Decorative LED lamps Custom lighting fixtures Battery-powered lighting projects Art installations Scale models and dioramas Display and showcase lighting Wearable electronics DIY electronics projects Creative lighting applications 🔹 Package Includes 1 × 3V 100mA LED Filament 38mm (Selected Color)
220-240V AC Swing Motor Gear Motor for Air Cooler Synchronous Motor
[AC Motor] The 220-240V AC Swing Motor Gear Motor is a compact synchronous motor specially designed for air cooler oscillation and swing movement applications. It delivers smooth and stable low-speed rotation, making it ideal for automatic airflow control systems. In addition, the motor operates directly on standard 220-240V AC power, eliminating the need for external driver circuits. As a result, it can be easily integrated into household appliances and industrial cooling equipment. Because of its synchronous motor design, the motor maintains stable rotational speed based on the AC supply frequency. Furthermore, the built-in gear reduction mechanism provides controlled torque and smooth swing movement with low noise operation. The motor is designed for continuous duty applications and features low power consumption with reliable long-term performance. Moreover, the compact body and screw-mount design allow quick installation and easy replacement in air coolers and oscillation systems. This synchronous swing motor is widely used in air coolers, ventilation systems, oscillating fans, automation projects, and household appliances. 🔹 Key Features Designed for air cooler swing operation Operates directly on 220-240V AC supply Smooth synchronous gear motor operation Stable low-speed rotation Low noise and low power consumption Compact and lightweight construction Durable internal gear mechanism Suitable for continuous operation 🔹 Technical Specifications Product Type: AC Synchronous Swing Motor Motor Type: Gear Reduction Synchronous Motor Operating Voltage: 220V–240V AC Rated Frequency: 50/60Hz Rotation Speed: Typically 4–6 RPM (depends on model) Power Consumption: Approx. 4W–5W Rotation Direction: CW / CCW Gear Mechanism: Internal Reduction Gear Shaft Type: Metal Round-Shaft Mounting Type: Screw Mount Insulation Class: Class E Body Material: Metal + Plastic Operating Temperature: -10°C to +55°C Noise Level: Low Noise Operation Duty Cycle: Continuous Duty Application Type: Swing / Oscillation Mechanism 🔹 Working Principle This motor works using synchronous AC motor technology, where the rotor rotates according to the AC supply frequency. The internal reduction gears decrease the motor speed while increasing torque, allowing smooth and controlled oscillation movement. 🔹 Applications This swing motor is suitable for many electrical and mechanical applications, including: Air coolers Oscillating fans Ventilation systems Swing control mechanisms Household appliances Automation systems DIY electronics projects 🔹 Package Includes 1 × 220-240V AC Swing Motor Gear Motor
Type-C USB Mini Humidifier DIY Kit 4 in 1 | 4-Fogger Mist Maker Module | Ultrasonic Atomizer Film Sheet with Driver Board
[Ultrasonic Sensor] The Type-C USB Mini Humidifier DIY Atomizer Kit is a compact ultrasonic mist generation module designed for building or repairing USB-powered humidifiers, aroma diffusers, and fogging systems. Powered directly from a 5V USB Type-C source, the kit features a high-performance driver board and four ultrasonic ceramic atomizer discs that generate a dense, cool mist with low power consumption. Using advanced 108KHz ultrasonic atomization technology, the module converts water into ultra-fine mist particles without producing heat or mechanical noise. The stable driver circuit ensures reliable oscillation, efficient mist production, and long service life, making it an excellent choice for DIY enthusiasts, students, makers, repair technicians, and electronics hobbyists. Simply connect the module to a 5V USB Type-C power source, place the atomizer discs in water, and enjoy instant cool mist generation. It is compatible with custom humidifier enclosures, bottles, containers, 3D-printed projects, hydroponic systems, and decorative fog applications. ⭐ Features USB Type-C powered (5V DC) Four ultrasonic ceramic atomizer discs High-density cool mist output Advanced ultrasonic atomization technology Stable driver circuit for reliable operation Low power consumption Silent operation with no moving parts Compact and lightweight design Easy plug-and-play installation Ideal for DIY humidifiers and aroma diffusers 📋 Technical Specifications Product Type: USB Ultrasonic Humidifier Driver Kit Power Input: USB Type-C Female Operating Voltage: DC 4.5V–5V Input Voltage: 5V USB Operating Current: 300mA (Typical) Power Consumption: 2.5W–3W Rated Power: 2W Operating Frequency: 108KHz ±2KHz Atomizer Quantity: 4 Ceramic Atomizer Discs Atomization Technology: Ultrasonic Mist Output: High Density Fine Mist Driver Board: Ultrasonic Oscillation Control Module Cooling Method: Natural Cooling Power Connector: USB Type-C Female Socket Material: Ceramic Atomizer Discs + PCB Driver Board 🔧 Applications Suitable for: DIY USB Humidifiers Aroma Diffusers Replacement Humidifier Modules Decorative Fog Makers Hydroponic Systems Smart Garden Projects Terrariums & Vivariums Indoor Plant Humidification Science & Educational Projects Prototype Development DIY Electronics Projects 📦 Package Includes 1 × Ultrasonic Driver Circuit Board 4 × Ceramic Ultrasonic Atomizer Discs ⚠️ Note Use only clean water for optimal performance and longer atomizer life. Do not operate the module without water. Product images are for illustrative purposes only. The actual product may vary slightly depending on the manufacturing batch.
7S 20A BMS for 18650 Lithium-Ion Battery Pack – Protection Board with Connector
[Lithium Battery Protection Board] The BMS NMC 7S 20A Same Port is an advanced Battery Management System designed for high-performance 25.9V lithium NMC battery packs. Engineered with integrated protection features and a compact PCB layout, this BMS offers robust electrical safety while minimizing design complexity with its single port for both charging and discharging. This Data sheet is for Lichtronics 7S 20A NMC PCM/BMS Charging Voltage -DC:29.4-30V CC/CV Max continuous charging current – 20A Over charge detection voltage – 4.25±0.05V Over discharge detection voltage – 2.8±0.08V Over current detection current – 40A Operating Temperature -45°C –+65°C Storage Temperature -45°C — +85°C Product Data Sheet Key Features Same Port Design: Combines charging and discharging through a single port for streamlined connections. 20A Continuous Discharge: Supports mid-range power devices with stable performance. Multiple Safety Protections: Overcharge Protection Over-discharge Protection Overcurrent & Short Circuit Cut-off Temperature Detection Passive Balancing: Ensures equal charge across cells for longer battery life. Compact and Lightweight Design: Ideal for tight enclosures or portable builds. Connector Included: Easily connect to standard 7S battery configurations. Technical Specifications Specification Details Battery Chemistry Lithium NMC (3.7V/cell) Configuration 7S (7 Cells in Series) Nominal Voltage 25.9V Charge Cut-off Voltage 29.4V (4.2V per cell) Discharge Cut-off ~17.5V (2.5V per cell) Max Continuous Current 20A Port Type Same port for charge/discharge PCB Size Compact footprint Balance Current 30-60 mA Applications Electric Bikes & Scooters Solar Lighting & Backup Power Portable DIY Power Systems Battery Replacements & Packs Energy Storage & IoT Solutions The PCM NMC 07S/20A SAME PORT (SLCT) is a Protection Circuit Module (PCM) designed for lithium nickel manganese cobalt (NMC) battery packs configured in a 7-series (07S) setup. This module provides overcharge, over-discharge, overcurrent, and short-circuit protection to safeguard the battery and enhance its lifespan. It is rated for a maximum continuous current of 20A, allowing higher current flow for larger applications. The "SAME PORT" feature suggests that both charging and discharging can occur through the same port, simplifying the battery management system. The "SLCT" (selectable) feature likely refers to adjustable settings for specific battery configurations or protections. 📦 Package Includes 1 × 7S 20A BMS Protection Board (with connector)
5V 1A DC Power Supply Adapter – High-Quality Regulated Charger with 1-Year Warranty
[Adaptor Power Supply] The 5V 1A DC Power Supply Adapter is a high-quality, reliable, and efficient adapter designed to deliver stable 5-volt output for a wide range of low-power electronic devices. Built with superior components and advanced protection circuitry, this adapter ensures smooth and consistent power delivery, making it ideal for LED projects, small routers, USB-powered devices, DIY electronics, speakers, and more. Featuring overload, short-circuit, and over-voltage protection, this adapter guarantees safe operation and long-term durability. Its compact and lightweight design makes it perfect for both home and office use. Backed by a 1-year warranty, this 5V 1A adapter is your trusted choice for replacing or upgrading your power supply. ✅ Features High-quality 5V 1A DC power adapter for low-power electronic devices Provides stable and regulated 5V output Ideal for LED strips, routers, audio devices, DIY projects, and small gadgets Built-in overload, short-circuit, and over-voltage protection Durable build quality ensures long-lasting performance Compact, lightweight, and energy efficient Perfect replacement adapter for various 5V electronic appliances Comes with a 1-year warranty for hassle-free use Specifications:- Input – 100-240 VAC 50/60Hz Category – Switch Mode Power Adaptor (SMPS) Output Type – DC Output – 5Volts 1Amp * Product Images are shown for illustrative purposes only and may differ from actual product.
Foxen 12V 3A BIS Approved Power Adapter – High-Quality DC Power Supply with 1-Year Warranty
[Adaptor Power Supply] The Foxen 12V 3A BIS Approved Power Adapter is a premium-quality DC power supply designed to deliver safe, stable, and efficient performance for a wide range of electronic devices. Certified by BIS (Bureau of Indian Standards), this adapter meets all safety and quality benchmarks, making it a trusted choice for LED strips, CCTV cameras, WiFi routers, speakers, set-top boxes, and DIY electronics projects. With advanced protection features including overload, short-circuit, and over-voltage protection, the Foxen adapter ensures long-lasting reliability for your devices. It comes with a 1-year warranty, giving you complete peace of mind. Built using high-grade components, this adapter offers consistent 12V 3A regulated output, strong durability, and efficient power delivery suitable for home, office, and industrial use. ✅ Features BIS Approved 12V 3A DC power adapter for superior safety Suitable for LED strips, CCTV cameras, routers, speakers, and DIY electronics Delivers stable 12V regulated output for smooth and reliable performance Built-in overload, short-circuit, and over-voltage protection High-quality components ensure long life and safe operation Comes with 1-year warranty for worry-free use Strong build quality with long cable for convenient installation Ideal as a replacement adapter for home, office, and industrial devices Specifications:- Input – 100-240 VAC 50/60Hz Category – Switch Mode Power Adaptor (SMPS) Output Type – DC Output – 12Volts 3 Amp Package Includes: 1 x Foxen 12V 3A BIS Approved Power Adapter – High-Quality DC Power Supply * Product Images are shown for illustrative purposes only and may differ from actual product.
19V 2.1A DC Power Supply Adapter Good Quality with 1 Year Warranty
[Adaptor Power Supply] The 19V 2.1A DC Power Supply Adapter is a premium-quality regulated charger designed to deliver stable, efficient, and reliable power for a wide range of electronic devices. With a precise output of 19 volts and 2.1 amps, this adapter is perfect for laptops, LCD/LED monitors, routers, CCTV systems, mini PCs, and other 19V-powered equipment. Built with high-grade components and advanced SMPS technology, this power adapter ensures consistent voltage output with low ripple and excellent load regulation. It protects your devices with built-in over-voltage, over-current, short-circuit, and over-temperature protection, enhancing safety and extending device lifespan. The adapter features a durable enclosure, strong output cable, and standard DC connector, making it an ideal replacement or spare charger for home, office, and professional use. Backed by a 1-year warranty, this charger guarantees dependable performance and long-term reliability. ⭐ KEY FEATURES ✔ Output Voltage: 19V DC✔ Output Current: 2.1A (Stable Regulated Output)✔ High-Quality SMPS Design – Efficient & low heat✔ Built-in Over-Voltage, Over-Current & Short-Circuit Protection✔ Suitable for laptops, monitors, routers, CCTV & electronic devices✔ Compact, lightweight & portable design✔ 1-Year Manufacturer Warranty 🔧 TECHNICAL SPECIFICATIONS Input Voltage: AC 100–240V, 50/60Hz Output Voltage: DC 19V Output Current: 2.1A Power Output: ~40W Connector Type: Standard DC Plug (as per variant) Technology: Switching Mode Power Supply (SMPS) Protection: Over-voltage, over-current, short-circuit, thermal Warranty: 1 Year 📦 PACKAGE INCLUDES 1 × 19V 2.1A DC Power Supply Adapter
USB Type-A Male Connector Plug (Solder Type) – DIY USB 2.0 Charging & Data Cable Connector
[USB Socket] 📖 Product Description Build your own USB cables easily with this USB Type-A male connector plug.It’s perfect for DIY cable making, USB repairs, and electronic projects.This connector features a strong nickel-plated metal shell, 4 solder pins, and a standard USB 2.0 interface for reliable performance in both power and data transmission. Use it to repair broken cables, create custom USB extensions, or prototype devices that connect to any USB-compatible port (like power banks, chargers, Arduino boards, and embedded systems). Please check our others items: Click Here ⚙️ Key Features ✅ Standard USB Type-A male plug – fits all USB 2.0 Type-A ports ✅ DIY solder type design – easy to connect wires securely ✅ Durable metal housing – ensures longevity and protection ✅ Stable power & data transfer – ideal for charging and communication ✅ Perfect for makers, technicians, and electronic enthusiasts 📐 Technical Specifications Specification Details Connector Type USB Type-A Male Interface Standard USB 2.0 Pin Count 4 Pins Mount Type Cable / Solder Type Shell Material Nickel-Plated Metal Insulator Material High-Temperature Plastic Color Silver with White Insulator Rated Voltage 5V DC Rated Current Up to 2A Operating Temperature −20 °C to +70 °C Dimensions Approx. 20 mm × 18 mm × 4.5 mm Weight Approx. 2 g 💡 Applications DIY USB charging cables Custom USB extension cables USB data and power projects Embedded systems, Arduino, Raspberry Pi Replacement connector for broken USB plugs 📦 Package Includes 1 × USB Type-A Male Connector Plug (Solder Type)
ZK-MT21 bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio Stereo Amplifier Tone Board Bass AMP AUX
[Amplifier Board] ZK-MT21 2.1 Channel Bluetooth 5.0 Audio Amplifier Module – 50W × 2 + 100W Subwoofer The ZK-MT21 2.1 Channel Bluetooth Audio Amplifier Module is a compact high-power stereo amplifier board designed for DIY Bluetooth speaker and home audio projects. It supports Bluetooth 5.0 and AUX audio input and provides dedicated left, right and subwoofer channels with adjustable volume, bass, treble, subwoofer volume and subwoofer frequency controls. With a suitable DC power supply and properly matched speakers, the module can deliver up to 50W + 50W for the left/right channels and up to 100W for the subwoofer channel. The board includes protection against reverse connection, overheating, overcurrent and short circuit. ⭐ Key Features Model: ZK-MT21 2.1 channel stereo audio amplifier Bluetooth 5.0 wireless audio input Bluetooth transmission distance up to approximately 15 meters under suitable conditions AUX wired audio input Left + Right + Subwoofer output Output up to 50W × 2 + 100W subwoofer Supports 4Ω–8Ω speakers Adjustable main volume Adjustable bass and treble for left/right channels Adjustable subwoofer volume Adjustable subwoofer frequency Subwoofer frequency adjustment range 20Hz–200Hz Reverse-polarity protection Overheat protection Overcurrent protection Short-circuit protection Compact amplifier board design Suitable for DIY Bluetooth speaker projects 📋 Technical Specifications Product Name: 2.1 Channel Audio Amplifier Module Model: ZK-MT21 Bluetooth Version: 5.0 Bluetooth Range: Approximately 15m Bluetooth Shielding: No shielding Audio Input: AUX + Bluetooth Channel: 2.1 Input Sensitivity: 500mV Amplifier Chip Solution: Domestic power amplifier chip Power Supply: DC 12–24V Recommended Supply Current: 5A or above Left Channel Output: <50W Right Channel Output: <50W Subwoofer Output: <100W Total Configuration: 50W × 2 + 100W Compatible Speaker Impedance: 4–8Ω Recommended Speaker Power: 20–100W Subwoofer Frequency Adjustment: 20Hz–200Hz Product Dimensions: 93 × 90 × 22mm Package Weight: Approximately 185g Protection: Reverse connection, overheat, overcurrent and short circuit ⚠️ Power Supply Warning:Do not connect this module directly to a 24V battery pack. Use a suitable regulated DC power supply as specified for the module. 🎛️ Control Functions MAIN-VOLUME: Controls the overall volume of the left, right and subwoofer channels. R&L CHANNEL-BASS: Adjusts bass level for the left and right channels. R&L CHANNEL-TREBLE: Adjusts treble level for the left and right channels. SUBWOOFER-VOLUME: Controls the subwoofer volume. SUBWOOFER-FREQ: Adjusts the subwoofer cutoff frequency from approximately 20Hz to 200Hz. 🔊 Speaker Selection Left and right channels can be connected to 4Ω–8Ω full-range or mid/high-frequency speakers. Recommended speaker power is 20W–100W. The subwoofer output should be connected to a suitable subwoofer speaker, not a regular full-range speaker. The subwoofer should have suitable low-frequency performance, with the source information recommending a frequency capability of at least 50Hz. Speaker impedance and power should be matched correctly with the amplifier. 🔌 Power Supply Selection The power supply is important for achieving proper amplifier performance and sound quality. A power supply with excessive ripple may increase background noise. Recommended supply: 18V / 19V / 24V with current above 5A Lower-voltage or lower-current supplies can be used, but available output power will be reduced. Insufficient supply current can cause voltage drop, abnormal operation or poor sound quality. If the amplifier is operated near maximum volume, an inadequate power supply may result in distortion. The power supply should have sufficient capacity for the actual amplifier load. Higher supply voltage can provide greater available output power within the module's specified operating range. 📱 Bluetooth & AUX Input The ZK-MT21 provides two audio input methods: Bluetooth Bluetooth 5.0 wireless audio input Bluetooth is the preferred input mode according to the supplied product information. Bluetooth supports automatic reconnection. Once Bluetooth is successfully connected, the module operates in Bluetooth mode. AUX Connect an external audio source through the AUX input. When using AUX, ensure the Bluetooth connection has been disconnected if necessary. 🔧 Applications DIY Bluetooth speakers 2.1 channel speaker systems Home audio projects Portable audio systems Subwoofer amplifier projects Custom speaker cabinets Desktop speaker systems Multimedia speaker systems Electronics and audio DIY projects Replacement/custom amplifier systems 🛠️ Installation & Usage Connect a suitable DC 12–24V power supply to the amplifier module. Connect the left and right speakers to their respective output terminals. Connect a suitable subwoofer to the subwoofer output. Ensure the speaker impedance is within the supported 4–8Ω range. Connect the audio source through Bluetooth or AUX. Adjust the main volume, bass, treble, subwoofer volume and frequency according to your requirements. Start with a low volume and gradually increase it. Ensure adequate ventilation and heat dissipation during high-power operation. ⚠️ Important Precautions Do not connect directly to a 24V battery pack. Use a suitable regulated DC power supply. Do not reverse the power supply polarity. Do not short-circuit the speaker outputs. Do not exceed the recommended speaker power and impedance. Ensure the power supply can provide sufficient current. Insufficient power may cause distortion or abnormal operation. Excessive load can cause the amplifier to heat up and activate thermal protection. Provide adequate ventilation during high-power operation. If distortion occurs at high volume, reduce the volume or use a more suitable power supply. The amplifier's actual output depends on the power supply, speaker impedance, audio input and overall system configuration. 📦 Package Includes 1 × ZK-MT21 Bluetooth 5.0 2.1 Channel Audio Amplifier Module
Passive Diaphragm Radiator Speaker Accessories Showcase Speaker Repair Parts
[Passive Radiator] Product Description: Model: 88 48 Low Frequency Vibration Plate Type: Sound film, diaphragm Material: Rubber Size: 88*48mm Net weight: 35 grams The bass radiator is also called a passive speaker. It is used to replace the inverted tube. The subwoofer made with the radiator has the following advantages compared with the traditional inverted subwoofer. The low frequency diving depth is equal to the back type, but the speed is the same. In this sense, it is faster than the inverted type, using the advantage of a certain closed box, and at the same time completely eliminating the disadvantage of the inverted structure-that is, the wind noise brought by the inverted nozzle. Package Includes: 1 x Passive Diaphragm Radiator Speaker Accessories Showcase Speaker Repair Parts