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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
XH-W1219 12V Digital Temperature Controller Module with Dual LED Display & Waterproof NTC Sensor
[Relay Module, Temperature Sensor] 🌡️ XH-W1219 12V Digital Temperature Controller Module with Dual LED Display & Waterproof NTC Sensor Dual LED Display • 12V DC Operation • 10A Relay Output • Heating & Cooling Modes • Waterproof NTC Sensor The XH-W1219 12V Digital Temperature Controller Module is a high-precision thermostat controller designed for automatic temperature monitoring and control in heating and cooling applications. Powered by 12V DC, this module features a dual LED display that simultaneously shows the current temperature and set temperature, making operation more convenient than the popular W1209 controller. Equipped with a waterproof NTC 10K temperature sensor, the XH-W1219 accurately measures temperatures from -50°C to +110°C. The onboard 10A relay output can directly control heaters, cooling fans, pumps, compressors, and other electrical loads within its rated capacity. The module is based on a Nuvoton microcontroller, which stores all settings in non-volatile memory, ensuring that user configurations are retained even after power loss. It supports both Heating (H) and Cooling (C) modes, adjustable hysteresis, temperature calibration, delay start, and high-temperature alarm functions. Ideal for incubators, aquariums, refrigeration systems, greenhouse automation, HVAC equipment, battery temperature monitoring, and industrial automation, the XH-W1219 provides reliable and accurate temperature control in a compact module. ⭐ Features Dual LED display for simultaneous temperature and setpoint display Operates on 12V DC High-accuracy waterproof NTC 10K temperature sensor Temperature control range from -50°C to +110°C Supports Heating and Cooling modes Built-in 10A relay output Adjustable temperature hysteresis Temperature calibration function Adjustable relay delay start High-temperature alarm function Stores settings in non-volatile memory Easy configuration using three push buttons High measurement accuracy (0.1°C resolution) Based on a Nuvoton MCU Compact PCB design with mounting holes 📋 Technical Specifications Product Type: Digital Temperature Controller Module Model: XH-W1219 Operating Voltage: 12V DC Display: Dual 3-Digit LED (Current Temperature & Set Temperature) Temperature Sensor: Waterproof NTC 10K Thermistor Temperature Control Range: -50°C to +110°C Temperature Resolution: 0.1°C Temperature Calibration: -10°C to +10°C Relay Output: 10A (Maximum) Relay Contact Rating: Up to 120VAC 10A / 14VDC 10A Control Modes: Heating (H) / Cooling (C) Hysteresis Setting: 0.1°C to 30°C Delay Start: 0–10 Minutes High Temperature Alarm: -49°C to +110°C Memory: Non-Volatile Parameter Storage Controller: Nuvoton MCU Dimensions: Approx. 60 × 44 × 17 mm Weight: Approx. 22 g (may vary slightly by manufacturer) ⚙️ Parameter Functions Parameter Description P0 Heating (H) / Cooling (C) Mode Selection P1 Temperature Hysteresis (Return Difference) P2 Maximum Temperature Limit P3 Minimum Temperature Limit P4 Temperature Calibration P5 Relay Delay Start (0–10 Minutes) P6 High Temperature Alarm Setting 🔧 Applications Suitable for: Egg Incubators Aquarium Temperature Control Greenhouse Automation Refrigeration Systems Cooling Fans Heating Elements Water Heaters HVAC Systems Fermentation Equipment Battery Temperature Monitoring Industrial Automation Laboratory Equipment DIY Electronics Smart Home Projects Arduino & Raspberry Pi Projects (Relay Interface) 📦 Package Includes 1 × XH-W1219 12V Digital Temperature Controller Module 1 × Waterproof NTC 10K Temperature Sensor ⚠️ Note Operates only on 12V DC. The relay output is rated for 10A maximum. For higher-power loads, use an external contactor or relay. Sensor cable can be extended if required using appropriate wiring. Product appearance or PCB color may vary slightly depending on the manufacturing batch.
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
3A 250V Blue Push Button Switch Momentary Type NO Lock Push Switch
[Mechanical Switches] The 3A 250V Blue Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the electrical circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable plastic construction, the switch is suitable for many electronic and industrial applications. Furthermore, the bright blue button improves visibility and allows easy identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount design allows quick and secure installation into control panels and electronic enclosures. This push button switch is widely used in DIY electronics, industrial automation, robotics systems, alarm systems, doorbell circuits, and power control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight body Bright blue push button cap Easy panel mounting installation Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking (Push Only) Rated Voltage: 250V AC Rated Current: 3A Button Color: Blue Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Doorbell and alarm systems Power control circuits Electronic devices 🔹 Package Includes 1 × 3A 250V Blue Push Button Momentary Switch
3A 250V Yellow Push Button Momentary Type No Lock Push Only
[Mechanical Switches] The 3A 250V Yellow Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the electrical circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable plastic construction, the switch is suitable for many electronic and industrial applications. Furthermore, the bright yellow button improves visibility and allows easy identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for both AC and low-voltage DC control circuits. Moreover, the panel-mount design allows quick and secure installation into control panels and electronic enclosures. This push button switch is widely used in DIY electronics, industrial automation, robotics systems, alarm systems, doorbell circuits, and power control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight body Bright yellow push button cap Easy panel mounting installation Stable and reliable switching operation Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking (Push Only) Rated Voltage: 250V AC Rated Current: 3A Button Color: Yellow Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Length: Approx. 28mm Body Material: Plastic Contact Material: Silver-Plated Metal Terminal Type: 2 Pin Solder/Quick Connect Operating Temperature: -25°C to +85°C 🔹 Applications This push button switch is suitable for many electronic and electrical applications, including: DIY electronics projects Industrial control panels Automation systems Robotics projects Doorbell and alarm systems Power control circuits Electronic devices 🔹 Package Includes 1 × 3A 250V Yellow Push Button Momentary Switch
3A 250V Red Push Button Momentary Type No Lock Push Only
[Mechanical Switches] The 3A 250V Red Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable construction, the switch is suitable for many electronic and electrical projects. Furthermore, the bright red button improves visibility and allows quick identification during operation. The switch supports loads up to 3A at 250VAC, making it suitable for low-power AC and DC control applications. Moreover, the simple panel-mount structure allows fast installation into enclosures and control panels. This push button switch is widely used in DIY electronics, robotics systems, industrial automation, doorbell circuits, audio equipment, and control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight construction Durable plastic body Easy panel mounting installation Bright red push button cap Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking Momentary Rated Voltage: 250V AC Rated Current: 3A Button Color: Red Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Body Length: Approx. 28mm Body Material: Plastic Contact Material: Metal Contacts 🔹 Applications This push button switch is suitable for many electronic and industrial applications, including: DIY electronics projects Robotics systems Industrial control panels Automation systems Doorbell circuits Audio equipment Power control applications Electronic devices 🔹 Package Includes 1 × 3A 250V Red Push Button Momentary Switch
XY-LPWM Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display Module
XY-LPWM Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display Module is a two-channel PWM signal generator. It has dedicated switches for adjusting the frequency and duty cycle separately. Using this module PWM output, frequency and duty cycle can be set as per requirements. Communication Standard: 9600 bps Data bits: 8 Stop bit: 1 Check digit: none Flow control: none Set the frequency of the PWM “F101”: Set the frequency to 101 Hz (001 to 999) “F1.05”: set the frequency of 1.05 kHz (1.00 ~ 9.99) “F10.5”: Set the frequency to 10.5kHz (10.0 ~ 99.9) “F1.0.5”: set the frequency of 105kHz (1.0.0 ~ 1.5.0) Set the PWM duty cycle “DXXX”: set the PWM duty cycle to XXX; (001 ~ 100) Such as D050, set the PWM duty cycle is 50% Read the set parameters Send a “read” string to read the set parameters. Set successfully return: DOWN; Setup failed to return: FALL. Application: This is used to drive a stepper motor driver’s square wave. Generate an adjustable pulse for MCU. Generate an adjustable pulse for controlling relative circuit (PWM adjust lightspeed, etc). Used as a square wave signal generator for experimental development and use. Parameter Settings: The module has 4 switches, two for frequency adjustment and two for duty cycle adjustment. This module can generate frequencies between 1Hz and 150kHz, with automatic switching for different ranges. Frequency is divided into four ranges, automatic switching: 1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz; 2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz; 3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz 4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz 5. e.g. frequency display: 100 indicates PWM output 100Hz pulse; 1.01 indicates PWM output 1.01K pulse; 54.1 indicates that the PWM output has a pulse of 54.1 kHz; 1.2.4 indicates that the PWM output is 124 kHz pulse; Duty cycle range: 1 – 100%. In case of a power outage or if the module is powered down, the parameters that are set are saved automatically, so there is no need to set the parameters again. Single touch for increasing or decreasing single unit and long press for fast increasing or decreasing. Features: LCD display for frequency and duty cycle. Wide frequency range. High precision. Serial communication(TTL based). Package Includes: 1 x XY-LPWM Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display Module.
Out of stockZB2L3 18650 Li-ion Lithium Lead-acid Battery Capacity Meter Discharge Tester Analyzer
[Battery Capacity Tester] Description: Material: Electrical components Color: See pictures ZB2L3 battery capacity tester discharge type 1.2-12V external load capacity of the battery and other tests 18650 Tools, single-function, by controlling the load off and get real-time integrated discharge current capacity results Maximum support 15V 3A discharged through the discharge voltage and current, itself does not discharge Maximum capacity statistics support 9999Ah (9999000mAh) Automatically identifying and developing appropriate battery termination voltage can also be manually adjusted Specifications: Power supply voltage: DC4.5-6V (micro USB connector) Operating Current: less than 70mA Discharge voltage: 1.00V-15.00V 0.01V resolution Termination voltage range: 0.5-11.0V Supported by current: 3.000A 0.001A resolution Maximum voltage measurement error: 1% + 0.02V Maximum current measurement error: 1.5% + – 0.008A Maximum battery capacity range: 9999Ah (1Ah = 1000mAh) greater value by shifting the decimal point to switch, when the display is less than 10Ah X.XXX, as shown above to achieve 10Ah XX.XX, and so on. Board size: 50mmX37mm Finished Size: 50mmX37mmX17mm (length X width X height maximum position size, contains copper foot height) Instructions: 1. The first test should be a fully charged battery. 2. Connect the battery to be tested positive to positive input, a negative input to the negative, can not be reversed (with load reversal may damage the circuit)! Load connected to the output of the positive and negative output, to work through the tester micro USB power supply (not available desktop or laptop USB powered), then the battery voltage. 3. Direct start test need only one press of the “OK” button, the tester can automatically develop an appropriate termination voltage of the battery full charge voltage, and will start flashing after the test three times. Need to develop artificial termination voltage only when the battery voltage display state by pressing “+” or “-” buttons to modify the termination voltage display beginning with P, behind the representative voltage resolution 0.1V, set up after pressing the “OK “start testing. 4. After the start of the test the tester will control the load of the electronic switch is turned on, the test data shows that the process will release capacity (Ah), current discharge current (A) and battery voltage (V) between the wheel was. When the battery voltage reaches the set cut-off voltage, load control switches off the tester display data stays in capacity (Ah) and above and the corresponding indicator flashes quickly together, now displays the actual capacity of the battery is discharging capacity, about the press “OK” to terminate flashing allows stable data display, press again “OK” button to return to the power-on state can just replace the battery test the next section …… Error codes and their meanings: Err1: battery voltage is above 15V Err2: battery voltage is lower than the termination voltage Err3: Battery can not afford to load or discharge current line too much resistance Err4: overcurrent (current exceeds 3.1A) Err5:Improper use or incorrect wiring has caused the device to be burned out and cannot be used (current sampling or control switch MOS burned out). Note: Use the resistance of the discharge process, resistive load will seriously heat, please pay attention to safety! This circuit voltage in order to improve the measurement accuracy, specially designed DC bias, when the terminal displays nothing then a small voltage does not affect the actual measurement, if you are shorting the input terminals (absolute 0V) will show 0 No retail package Quantity:1Pc Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!! Package Content: 1Pc x battery capacity tester 2Pc x Load resistor Power Battery Capacity Tester LED Display Micro USB Li-ion Lithium 18650 External Load Battery Discharge Testing Analyzer
1.5 Inch 42mm Neodymium Speaker 4Ohm 5W Built-in Full Range Bass Speaker For JBL Audio Parts
[Speakers] Product parameter: Product name: 1.5 inch 4 ohm 5W full range speaker Size: 1.5 inch Impedance: 4 Ohm Power: 5W Sensitivity: 80db(Approx) Speaker height: 21MM Panel diameter: 40MM Height of tilted feet: 6MM Diagonal diameter: 55MM Diagonal screw hole: 49MM Built-in opening: 40MM Structure: 22mm neodymium magnet Can be used to modify JBL filp2, JBL Mivro Wireless, JBL go and other speakers. This is compatible not Original speaker. **** No warranty or No Guarantee on this product not returnable.**** Package included: 1 x 1.5 Inch 42mm Neodymium Speaker 4Ohm 5W Built-in Full Range Bass Speaker For JBL Audio Parts
315MHz 4 Channel Wireless RF Remote Control Kit with Receiver Module (Non-Locking Mode)
[RF Module] 📡 315MHz 4 Channel Wireless RF Remote Control Kit with Receiver Module (Non-Locking Mode) 4 Channel RF Remote • 315MHz ASK Communication • 5V Receiver • Non-Locking Mode • Long Range Wireless Control The 315MHz 4 Channel Wireless RF Remote Control Kit is a reliable wireless control solution consisting of a 4-button RF transmitter and a super regenerative ASK receiver module. Operating at 315MHz, this kit is ideal for remote switching, automation, robotics, security systems, and DIY wireless control projects. The receiver module features four independent digital outputs (D0–D3) that correspond to the four buttons on the transmitter. When a button is pressed, the respective output pin goes HIGH, returning LOW immediately after the button is released. This Non-Locking (Momentary/Jog) operation makes the module perfect for applications requiring temporary switching such as electric door control, motor jogging, relay activation, and microcontroller interfacing. The receiver operates from a 5V DC supply and features a high-sensitivity ASK receiver with a Valid Transmission (VT) output pin for reliable signal detection. The transmitter uses a fixed-code encoder for secure communication and easy operation. Ideal for Arduino, ESP32, Raspberry Pi, AVR, PIC, industrial automation, wireless switching, and educational electronics projects. ⭐ Features 4-channel wireless RF remote control kit Operating frequency: 315MHz ASK (Amplitude Shift Keying) modulation Fixed-code RF transmitter Non-Locking (Momentary/Jog) operating mode Four independent digital outputs (D0–D3) High-sensitivity super regenerative receiver 5V DC receiver operating voltage VT (Valid Transmission) status output Compact PCB design Easy interface with microcontrollers Long wireless transmission range (environment dependent) Suitable for DIY and industrial automation 📋 Technical Specifications RF Transmitter Product Type: RF Wireless Remote Control Operating Frequency: 315MHz Number of Buttons: 4 Channels: 4 Modulation: ASK (Amplitude Shift Keying) Encoding Type: Fixed Code Operating Mode: Non-Locking (Momentary) Power Supply: 12V A23 Battery (Not Included) RF Receiver Module Operating Voltage: 5V DC Operating Frequency: 315MHz Receiver Type: Super Regenerative ASK Receiver Receiver Sensitivity: -98dBm Output Channels: D0, D1, D2, D3 VT Output: Yes (Valid Signal Output) Antenna Connection: External ANT Pin Recommended Antenna Length: Approx. 17cm (Quarter-Wave) Module Dimensions: Approx. 41 × 22 × 7 mm Receiver Pin Configuration VT – Valid Signal Output D3 – Channel 4 Output D2 – Channel 3 Output D1 – Channel 2 Output D0 – Channel 1 Output +5V – Power Input GND – Ground ANT – External Antenna Connection 🔧 Operating Modes Non-Locking (Momentary/Jog Mode) Press a button → Corresponding output goes HIGH. Release the button → Output immediately returns LOW. Ideal for momentary control applications. Note: This product is supplied in Non-Locking Mode only. 🔧 Applications Suitable for: Arduino Projects ESP32 Projects Raspberry Pi Projects Wireless Relay Control Home Automation Industrial Automation Remote Door Control Electric Door Locks Wireless Switching Robotics Motor Control Lighting Control Alarm Systems Security Systems DIY Electronics Educational Projects 📦 Package Includes 1 × 4-Button 315MHz RF Wireless Remote Control 1 × 315MHz Super Regenerative Receiver Module ⚠️ Note Battery is included. A 12V A23 battery is required for operation. Avoid bending or touching the receiver's onboard inductor (copper coil), as this may affect receiver sensitivity. Wireless operating range depends on antenna quality, obstacles, and surrounding RF interference. Product appearance may vary slightly depending on the manufacturing batch.
Out of stock1.5 inch 40 mm 4 Ohm 3W Speaker Woofer High Quality (can replace Jbl flip, Jbl go)
Generic 1.5 inch Bluetooth speaker (can replace jbl flip, Jbl go, Harman glass ) This is compatible speaker not original. Speaker parameters: Impedance: 4Ω Power: 3W-4W Diameter: 40mm Thickness: 20mm Magnet: 22mm high-quality 1.5-inch bluetooth speakers. This small speaker is exquisite in workmanship, has a durable sound quality, and is also very good for diving! This speaker not returnable or not refundable product.
Speaker 4 Ohm 3 Watt 40mm 1.5 Inch Mini Power Amplifier Speaker with Rubber Band with Foam
[Speakers] Features – Product Name : Speaker 4 Ohm 3 Watt 40mm 1.5 Inch Mini Power Amplifier Speaker with Rubber Band with Foam Power: 3W Impedance: 4 Ohm Size : 1.5inch/40mm (approx) With Rubber Band Size: 1.7 Inch / 44mm(approx) Colour: Black, Bronze Tone Material: Aluminum, Metal, Plastic, Foam and Magnet. Weight: 95g(Approx) Note: This is a low-cost non-branded product. We don't guarantee nice output and product finishing. We dispatch randomly as per color and brand availability. This speaker not returnable or not refundable product. Package Includes : 1 X Speaker 4 Ohm 3 Watt 40mm 1.5 Inch Mini Power Amplifier Speaker with Rubber Band with Foam
3A 250V Green Push Button Momentary Type No Lock Push Only
[Mechanical Switches] The 3A 250V Green Push Button Momentary Switch is a compact and reliable push-type switch designed for temporary ON/OFF control applications. It features a momentary non-locking mechanism, which means the switch remains active only while being pressed. In addition, the switch uses a Normally Open (NO) contact configuration. As a result, the circuit closes only when the button is pressed and automatically returns to its original state after release. Because of its compact size and durable construction, the switch is suitable for many electronic and electrical projects. Furthermore, the bright green button improves visibility and makes operation easy during usage. The switch supports loads up to 3A at 250VAC, making it suitable for low-power AC and DC control applications. Moreover, the simple panel-mount structure allows quick installation into enclosures and control panels. This push button switch is widely used in DIY electronics, robotics systems, industrial automation, doorbell circuits, audio equipment, and control applications. 🔹 Key Features Momentary push button operation Normally Open (NO) contact type Non-locking push switch design Compact and lightweight construction Durable plastic body Easy panel mounting installation Bright green push button cap Suitable for AC and DC applications 🔹 Technical Specifications Switch Type: Momentary Push Button Switch Contact Type: Normally Open (NO) Operation Type: Non-Locking Momentary Rated Voltage: 250V AC Rated Current: 3A Button Color: Green Mounting Type: Panel Mount Mounting Hole Diameter: Approx. 12mm Button Diameter: Approx. 12mm Total Body Length: Approx. 28mm Body Material: Plastic Contact Material: Metal Contacts 🔹 Applications This push button switch is suitable for many electronic and industrial applications, including: DIY electronics projects Robotics systems Industrial control panels Automation systems Doorbell circuits Audio equipment Power control applications Electronic devices 🔹 Package Includes 1 × 3A 250V Green Push Button Momentary Switch
![Subwoofer 4 Ohm 3watt [ 2inch/50mm ] Speaker — Display & Communication](/products/subwoofer-4-ohm-3watt-2inch-50mm-external-magnet-speaker/front.webp)
Subwoofer 4 Ohm 3watt [ 2inch/50mm ] Speaker
[Speakers] Features – Product Name : 3 Watt 4 ohm 2-inch Acoustic Speaker Power: 3-5W Impedance: 3-4 Ohm Type: External Magnetic Size : 2inch/50mm (approx) Colour: Black, Bronze Tone Material: Aluminum, Metal, Plastic, and Magnet. Weight: 70g External magnet depends on stock This is non returnable product Note: This is a low-cost non-branded product. We don't guarantee nice output and product finishing. We dispatch randomly as per color and brand availability.
SPST Momentary Rectangular Horn Type Push Button Switch – Red
[Mechanical Switches] SPST Momentary Rectangular Horn Type Push Button Switch – Red The SPST Momentary Rectangular Horn Type Push Button Switch (Red) is a durable and reliable momentary push-to-ON switch designed for horn, alarm, buzzer, control, and general-purpose switching applications. The switch completes the electrical circuit only while the button is pressed and automatically returns to the OFF state when released. Its rectangular horn-type button provides a convenient pressing surface, while the red actuator offers high visibility for applications where quick identification of the control is important. The panel-mount design allows easy installation in control panels, vehicles, enclosures, and DIY projects. ⭐ Key Features SPST (Single Pole Single Throw) Momentary push-to-ON operation Spring-return action Rectangular horn-type button Red button Panel-mount design Durable construction Reliable contact performance Easy to operate Suitable for horn and alarm applications 📋 Technical Specifications Product Type: Momentary Push Button Switch Switch Type: SPST Operation: Momentary / Spring Return Contact Action: Push-to-ON Button Shape: Rectangular Horn Type Button Color: Red Mounting Type: Panel Mount Number of Poles: Single Pole Number of Throws: Single Throw Application: Horn / Alarm / Control Contact Type: Momentary Note: The supplied product information does not specify the voltage rating, current rating, dimensions, terminal type, or mechanical/electrical life, so these specifications should be verified against the exact product variant before listing them. 🔧 Applications Vehicle Horn Switch Car Horn Bike Horn Marine Horn Alarm & Buzzer Control Industrial Control Panels Start / Stop / Reset Functions DIY Electronics Projects Consumer Electronics Testing Equipment Temporary Circuit Activation 🛠️ Installation Install the switch through a suitable panel cutout and secure it firmly. Connect the switch terminals according to the required circuit. Since this is a momentary push-to-ON switch, the circuit is active while the button is pressed and returns to its normal OFF state when released. 📦 Package Includes 1 × SPST Momentary Rectangular Horn Type Push Button Switch – Red ⚠️ Precautions Verify the switch's voltage and current rating before connecting a load. Disconnect the power supply before installation or wiring. Ensure terminals and wiring are properly secured. Do not exceed the manufacturer's electrical ratings. For vehicle or industrial applications, use an appropriate relay where the load current exceeds the switch rating. Product images are for illustration purposes only and actual appearance may vary.
6×6×5mm Tactile Push Button Switch – Through-Hole Red
[Mechanical Switches] 6×6×5mm Tactile Push Button Switch – Through-Hole The 6×6×5mm Tactile Push Button Switch is a compact momentary push-button switch widely used as a standard input button in electronic circuits, PCB projects, Arduino projects, DIY electronics, consumer electronics, and control panels. The switch is normally open and temporarily closes the circuit when the button is pressed. Its compact 6×6mm body with 5mm height makes it suitable for space-constrained PCB designs. The through-hole construction allows secure PCB mounting and can also be used with solderless breadboards for prototyping. The switch provides tactile feedback during operation and is designed for repeated switching applications. It is suitable for applications including telecommunications, consumer electronics, audio/visual equipment, testing and instrumentation, computers, and peripheral devices. ⭐ Key Features 6×6×5mm compact size Momentary tactile push-button switch Normally Open (NO) contact Through-hole PCB design Suitable for breadboard prototyping Round shaft/button design Strong tactile feedback Long operating life of up to 300,000 cycles as specified Compact and lightweight Good electrical conductivity Suitable for electronic products and household appliances Designed for reliable repeated operation 📋 Technical Specifications Product Type: Tactile Push Button Switch Dimensions: 6 × 6 × 5mm Switch Type: Momentary Tactile Push Button Contact Type: Normally Open (NO) Mounting Type: Through Hole Button/Shaft Shape: Round Operation: Momentary Color: Red Operating Life: Up to 300,000 cycles Contact Technology: Dome Contact Application: PCB / Electronic Circuits Breadboard Compatible: Yes Construction: Compact and Lightweight 🔌 How It Works The switch contacts remain open when the button is not pressed. Pressing the button temporarily closes the contacts and completes the electrical circuit. When the button is released, the contacts return to their normally open state. This makes the switch suitable for reset buttons, menu controls, user inputs, trigger buttons, and other momentary switching applications. 🔧 Applications Arduino Projects Microcontroller Projects PCB Prototyping DIY Electronics Consumer Electronics Telecommunications Equipment Audio / Visual Equipment Computer Peripherals Testing & Instrumentation Household Electronic Appliances Control Panels Reset and Input Buttons 📦 Package Includes 1 × 6×6×5mm Tactile Push Button Switch ⚠️ Precautions Ensure the switch is mounted securely on the PCB. Do not exceed the electrical ratings of the switch. Avoid excessive mechanical force on the button. Keep the switch away from excessive moisture and contamination. Verify the correct pin configuration before installation. Use appropriate soldering temperature and time during PCB assembly.
W1209 Digital Temperature Controller Thermostat Module with Display and Waterproof Temperature Sensor
[Temperature Sensor] XH W1209 12V Digital Temperature Control Module + Display and NTC Temp Sensor This is XH W1209 digital temperature controller Module W/ Display and NTC Waterproof Temperature Sensor. W1209 Mini thermostat Temperature controller is low-cost 12V Temperature controller with 7-segment display and 3 switch keypad for setting temperature and other parameters. The module features an NTC thermistor temperature sensing and has an accuracy of 0.1 C. The XH W1209 digital temperature controller Module W/ Display and NTC Waterproof Temperature Sensor is an incredibly low cost yet highly functional thermostat controller. With this module, you can intelligently control power to most types of electrical device based on the temperature sensed by the included high accuracy NTC temperature sensor. Although this module has an embedded microcontroller no programming knowledge is required. 3 tactile switches allow for configuring various parameters including on & off trigger temperatures. The onboard relay can switch up to a maximum of 240V AC at 5A or 14V DC at 10A. We can display current temperature in degrees Centigrade via its 3 digit seven segment display and the current relay state by an onboard LED. DISPLAYING THE CURRENT TEMPERATURE The thermostat will display the current temperature in °C by default. When in any other mode making no input for approximately 5 seconds will cause the thermostat to return to this default display. SETTING THE TRIGGER TEMPERATURE To set the trigger temperature press the button marked ‘SET’. The seven-segment display will flash. You can now set a trigger temperature (in °C) using the ‘+’ and ‘-‘ buttons in 0.1° increments. If we didn’t press any buttons for approximately 2 seconds the trigger temperature will be store and the display will return back to the current temperature. SETTING THE PARAMETERS To set any parameter first long press the ‘SET’ button for at least 5 seconds. The seven-segment display should now display ‘P0’. This represents parameter P0. Pressing the ‘+’ or ‘-‘ buttons will cycle through the various parameters (P0 to P6). Pressing the ‘SET’ button whilst any of these parameters are displayed will allow you to change the value for that parameter using the ‘+’ and ‘-‘ buttons. When finished setting a parameter press the set button to exit that option. If no buttons are pressed for approximately 5 seconds the thermostat will exit the parameter options and will return back to the default temperature display. SETTING THE COOLING OR HEATING PARAMETER P0 The parameter P0 has two settings, C and H. When setting to C (default) the relay will energize when the temperature is reached. Use this setting if connecting to an air-conditioning system. When set to H the relay will de-energize when the temperature is reached. Use this setting if controlling a heating device. SETTING THE HYSTERESIS PARAMETER P1 This sets how much change in temperature must occur before the relay will change state. For example, if set to the default 2oC and the trigger temperature has been set to 25oC, it will not de-energize until the temperature falls back below 23oC. Setting this hysteresis helps stop the thermostat from continually triggering when the temperature drifts around the trip temperature. SETTING THE UPPER LIMIT OF THE THERMOSTAT PARAMETER P2 This parameter limits the maximum trigger temperature that can be set. It is useful as a safety to stop an excessively high trigger temperature from accidentally being set by the user. SETTING THE LOWER LIMIT OF THE THERMOSTAT PARAMETER P3 This parameter limits the minimum trigger temperature that can be set. It is useful as a safety to stop an excessively low trigger temperature from accidentally being set by the user. SETTING TEMPERATURE OFFSET CORRECTION PARAMETER P4 Should you find there is a difference between the displayed temperature and the actual temperature; (for instance, if the temperature probe is on a long run of cable) you can make minor corrections to the temperature reading with this parameter. SETTING THE TRIGGER DELAY PARAMETER P5 To reach trigger temperature this parameter allows for delaying switching of the relay. The parameter can be set in one-minute increments up to a maximum of 10 minutes. SETTING THE HIGH-TEMPERATURE ALARM PARAMETER P6 Setting a value for this parameter will cause the relay to switch off when the temperature reaches this setting. The seven-segment display will also show ‘—‘ to indicate an alarm condition. The relay will not re-energize until the temperature falls below this value. The default setting is OFF.
HC-SR04-Ultrasonic Range Finder
[Ultrasonic Sensor] This HC-SR04-Ultrasonic Range Finder is a very popular sensor that is found in many applications where it requires measuring distance and detecting objects. The module has two eyes like projects in the front which forms the Ultrasonic transmitter and Receiver. The HC-SR04 ultrasonic sensor uses sonar to determine the distance to an object like bats or dolphins do. This Ultrasonic Sensor module is a transmitter, a receiver, and a control circuit in one single pack!! It has very handy and compact construction. It offers excellent range accuracy and stable readings in an easy-to-use package. Its operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). The Trigger and the Echo pins are the I/O pins of this module and hence they can be connected to the I/O pins of the microcontroller/Arduino. When the receiver detects the return wave the Echo pin goes high for a particular amount of time which will be equal to the time taken for the wave to return back to the sensor. Ultrasonic Ranging Module HC-SR04 provides 2cm-400cm non-contact distance sensing capabilities, Ranging accuracy up to 3mm. Wiring +5V(positive) Trig(control) Echo(receive) GND(negative) Features : Measures the distance within a wide range of 2cm to 400cm Stable performance Accurate distance measurement High-density Small blind distance Package Includes: 1 x HC-SR04-Ultrasonic Range Finder