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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Out of stock0.96 Inch Blue SPI OLED Display Module 7-Pin 128×64 – SSD1306
[LED/LCD Display] 0.96 Inch Blue SPI OLED Display Module 7-Pin 128×64 – SSD1306 The 0.96-inch Blue OLED Display Module is a compact graphical display based on the SSD1306 driver IC, featuring a 128×64 pixel resolution and blue monochrome display. This version has a 7-pin interface with a dedicated CS (Chip Select) pin, making it suitable for 4-wire SPI communication. The module is factory-configured for SPI and can also be modified for I2C/IIC communication on compatible board versions. With its compact size, wide viewing angle and low-power OLED technology, it is suitable for Arduino, ESP32, ESP8266, STM32, Raspberry Pi and other microcontroller projects. ⭐ Key Features 0.96-inch blue OLED display 128 × 64 pixel resolution SSD1306 driver IC 7-pin interface Dedicated CS (Chip Select) pin Factory configured for 4-wire SPI Supports SPI and I2C/IIC with appropriate configuration 3.3V/5V compatible on supported module versions No backlight required Low power consumption Wide viewing angle of more than 160° Compact PCB design Pre-soldered 7-pin male header Compatible with Arduino, ESP32, ESP8266, STM32 and Raspberry Pi projects 📋 Technical Specifications Display Type: OLED (Organic Light-Emitting Diode) Display Colour: Blue Display Size: 0.96 inch Driver IC: SSD1306 Resolution: 128 × 64 pixels Interface: SPI / I2C Default Interface: 4-wire SPI Input Voltage: 3.3V–5V Viewing Angle: >160° Module Dimensions: Approximately 27 × 27 × 4mm Operating Temperature: Approximately -30°C to +70°C Header: 7-pin male header, pre-soldered Display Type: Monochrome blue OLED 🔌 7-Pin Interface The 7-pin version provides the following connections: GND – Ground VCC – Power supply D0 / SCK / CLK – SPI clock D1 / MOSI / SDA – SPI data RES / RST – Display reset DC / A0 – Data/Command selection CS – Chip Select 🛠️ SPI Connection The module is normally supplied in 4-wire SPI configuration. For an Arduino Uno, a typical connection is: VCC → 5V GND → GND D0 → SCK / D13 D1 → MOSI / D11 RES → Digital I/O DC → Digital I/O CS → Digital I/O The dedicated CS pin allows the OLED to share the SPI bus with other devices such as SD cards or additional SPI peripherals. 🔄 I2C / IIC Configuration On compatible versions, the module can be converted from SPI to I2C by changing the appropriate resistor configuration on the PCB. The supplied board configuration may require: Moving the resistor from R3 to R1 Shorting R8 with solder Using D0 as SCL Using D1 as SDA Configuring DC for the I2C address The exact resistor positions can vary between board revisions, so check the markings on your particular PCB before modification. 🎯 Applications Arduino projects ESP32 projects ESP8266 projects STM32 development Raspberry Pi projects IoT devices Sensor displays Voltage/current meters Battery monitors Temperature displays Digital clocks Data loggers Portable electronic devices Robotics DIY measuring instruments Embedded systems Menu and status displays 💡 Advantages of OLED OLED technology is self-emissive, meaning the pixels produce their own light and do not require a conventional backlight. This provides high contrast, compact construction and a wide viewing angle while keeping power consumption relatively low. ⚠️ Important Notes This is the 7-pin SPI version, not the 6-pin version. The module is normally configured for SPI communication. Check the PCB labels before connecting the module. Do not exceed the specified supply voltage. Although many versions support 5V operation, the exact voltage tolerance can vary between board revisions. I2C operation may require hardware resistor modification. The actual PCB layout and component markings may vary slightly between production batches. Display colour: Blue. Libraries such as Adafruit SSD1306 and U8g2 can be used with compatible microcontrollers. 📦 Package Includes 1 × 0.96 Inch Blue SPI OLED Display Module
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.
5 Pin Mini SPDT Relay 12V 10A 250V PCB Mount Electromagnetic Relay
[Relay Module, Relays] 12V PCB Mount Sugar Cube SPDT Relay – 5 Pin 10A The 12V PCB Mount Sugar Cube SPDT Relay is a compact Single Pole Double Throw (SPDT) electromagnetic relay designed for switching AC and DC electrical loads using a microcontroller, sensor, automation circuit, or other low-power control system. Its compact PCB-mount design makes it suitable for DIY electronics, home automation, security systems, switching circuits, motor control, lighting control, and embedded applications. The relay features a 12V DC coil and a 5-pin SPDT configuration consisting of two coil terminals, COM (Common), NO (Normally Open), and NC (Normally Closed) contacts. When the coil is energized, the internal contact switches between the NC and NO terminals. With contact ratings of up to 10A at 250V AC, 10A at 125V AC, 12A at 120V DC, and 10A at 28V DC, this relay is suitable for a wide range of electrical switching applications. ⭐ Key Features SPDT (Single Pole Double Throw) relay 12V DC coil Compact Sugar Cube design 5-pin configuration PCB mounting type 10A @ 250V AC contact rating 10A @ 125V AC contact rating 12A @ 120V DC contact rating 10A @ 28V DC contact rating Coil resistance: approximately 270Ω Approximately 45mA nominal coil current 50/60Hz frequency specification Fast switching response Suitable for microcontroller and sensor-controlled switching Ideal for automation and control applications 📋 Technical Specifications Product Type: PCB Mount Relay Relay Type: SPDT (Single Pole Double Throw) Contact Configuration: 1 Form C Number of Pins: 5 Coil Voltage: 12V DC Trigger Voltage: 12V DC Coil Resistance: 270Ω Nominal Coil Current: Approximately 45mA Frequency: 50/60Hz Maximum AC Load: 10A @ 250V AC Maximum AC Load: 10A @ 125V AC Maximum DC Load: 12A @ 120V DC Maximum DC Load: 10A @ 28V DC Operating Time: 10ms Release Time: 5ms Mounting Type: PCB Mount Contact Terminals: COM / NO / NC Coil Terminals: Coil End 1 / Coil End 2 🔌 Pin Configuration Coil End 1: One terminal of the 12V DC relay coil Coil End 2: Other terminal of the 12V DC relay coil COM: Common switching contact NO: Normally Open contact NC: Normally Closed contact When the relay coil is not energized, COM is connected to NC. When the 12V DC coil is energized, COM switches from NC to NO. 🛠️ How It Works The relay uses an electromagnetic coil to mechanically switch an electrical circuit. Applying 12V DC to the coil energizes the relay and changes the contact position. A load connected between COM and NC remains connected when the relay is inactive. A load connected between COM and NO remains disconnected until the relay coil is energized. This allows a low-power control circuit such as an Arduino, microcontroller, sensor, timer, or automation controller to control a higher-current AC or DC load. 🔧 Applications Arduino Projects Microcontroller Projects Sensor-Controlled Switching Home Automation Security Systems Lighting Control Fan Control Motor Control Pump Control Power Supply Switching Industrial Control Systems Embedded Electronics DIY Electronics Projects 📦 Package Includes 1 × 12V PCB Mount Sugar Cube SPDT Relay – 5 Pin 10A ⚠️ Precautions Use a suitable 12V DC supply for the relay coil. Do not exceed the specified contact voltage and current ratings. Check the COM, NO, NC, and coil terminals before wiring. Use suitable flyback protection when driving the relay coil from sensitive electronic circuits. Use appropriate suppression/protection components for inductive loads such as motors, solenoids, and coils. Provide sufficient PCB insulation and clearance when switching mains voltage. Disconnect power before changing or modifying wiring. Do not touch exposed mains-voltage terminals during operation.
TP4056 1A Li-Ion Lithium Battery Charging Module with Micro USB 3.7V Charger Board
[Li-ion Rechargeable Battery Charger, Lithium Battery Protection Board] The TP4056 1A Li-Ion Lithium Battery Charging Module – Micro USB is a compact and efficient charging board designed for charging single-cell 3.7V lithium-ion and lithium polymer batteries. It features an onboard Micro USB connector, allowing direct charging from USB power sources such as computers, adapters, and power banks. In addition, the module supports external power input through the IN+ and IN- pads, making it suitable for custom battery charging applications and DIY electronics projects. As a result, users can easily integrate the module into portable devices and battery-powered systems. Because of its compact size and lightweight design, the TP4056 module is ideal for space-limited applications. Furthermore, the onboard charging management IC provides stable charging performance with high accuracy and reliable battery protection. The charging current is set to 1A by default, but it can also be adjusted by changing the onboard programming resistor. Moreover, the module includes dual LED indicators for charging status and full-charge indication. This charging module is widely used in power banks, DIY battery chargers, portable electronics, IoT devices, robotics systems, and rechargeable battery projects. 🔹 Key Features TP4056 lithium battery charging IC Onboard Micro USB input interface Suitable for 3.7V Li-Ion and LiPo batteries Default 1A charging current Adjustable charging current support Dual LED charging status indicators Compact and lightweight design High charging accuracy and stable performance Easy integration into DIY projects 🔹 Technical Specifications Product Type: Lithium Battery Charging Module Charging IC: TP4056 Input Interface: Micro USB Input Voltage: 5V DC Battery Type: 3.7V Li-Ion / LiPo Battery Default Charging Current: 1A Adjustable Current Range: 100mA – 1000mA Charging Method: Constant Current / Constant Voltage Charging Indicators: Charging LED & Full Charge LED Mounting Type: PCB Module Body Material: FR4 PCB 🔹 Applications This TP4056 charging module is suitable for many electronic applications, including: DIY power banks Rechargeable battery projects Portable electronics Robotics systems IoT devices Battery charging circuits Arduino projects DIY electronics projects 🔹 Package Includes 1 × TP4056 1A Li-Ion Lithium Battery Charging Module – Micro USB
Out of stockDC 12V Mini 370 Diaphragm Pump Self-Priming Suction Pressure Water Pump
[DC Water Pump] DC 12V mini 370 Self-Priming Water pump Introducing DC 12V Mini 370 Self-Priming Water Pump at best price in India with . Designed for durability and this DC 12V Mini 370 Diaphragm Pump offers consistent performance with self-priming capability & ensure smooth operation even at varying pressure. Compact and lightweight, this 12V 370 mini water pump is perfect for application like aquariums, small fountain, and portable water system. With its robust suction capabilities, this DC 12V Self-Priming Suction Pressure Water Pump ensure effective water flow in diverse setting. Its low power consumption and quiet operation make it perfect for both indoor and outdoor use. Built with high quality material, this pump is resistant to wear & ensure reliable performance over time. Feature Self-Priming Mechanism: This DC 12V mini 370 Self-Priming Water pump pump feature a self priming design for efficient water transfer. It ensure stable performance even with changing water level. Compact and Lightweight: Its small size and low weight make it easy to use in small space. Perfect for portable application need minimal space usage. High Suction Power: This water pump deliver strong suction power for quick and effective water movement. It can handle low pressure condition without loosing output efficiency. Durable Build Quality: This DC 12V Mini 370 Diaphragm Pump made from high quality material, this pump offer long lasting durability and performance. It resists wear and tear & ensure reliable operation over time. Versatile Application: It is also perfect for aquarium, small garden, and DIY water circulation project. The pump works effectively for a variety of home and industrial uses. Specification Specification Details Operating Voltage 12V DC Current Consumption 0.5A – 1A (depending on load) Flow Rate 1.5-2.5 liters per minute Maximum Pressure Up to 2.5 bar (36 PSI) Suction Lift Up to 2 meters Discharge Head Up to 3 meters Motor Type 370 brushed motor Self-Priming Yes, capable of dry priming Body Material High-quality plastic with corrosion resistance Port Diameter Inlet and outlet: 4mm Noise Level Low noise operation (<65 dB) Lifespan Over 1000 hours of continuous operation Applications Water transfer, small irrigation systems, DIY project Dimensions 24x61x24mm Weight 60g Package Includes: 1 x DC 12V Mini 370 Diaphragm Pump Self-Priming Suction Pressure Water Pump
Out of stock1 Meter DC 12 Volt 54 Led Multicolour Changing Auto Running LED Light Strip Interior Light Motorbike, Car LED (12 V, 1.5 W)
[RGB LED Strip] Description •Lamp Type: LED •Suitable For: Universal •Power Supply: 12 V •Color: Multicolor •Operating Wattage: 1.5 W •Brightness: 20 lm •Color Temperature: 4000 K •Operating Wattage: 1.5 W •Waterproof Dimensions Power Features Battery Type DC No Of Batteries 1 Battery Size 12V Power Source DC Other Power Features N/A Package includes: 1 x 1 Meter DC 12 Volt 54 Led Multicolour Changing Auto Running LED Light Strip Interior Light Motorbike, Car LED (12 V, 1.5 W)
7 IN 1 MULTICOLOR DOB COLOR CHANGING 220V
[COB LED] The 7-in-1 Multicolor DOB Color Changing 220V LED Light is a premium AC-powered LED module designed for decorative lighting, room ambience, DIY lamp projects, and home lighting upgrades. This high-brightness Direct-On-Board (DOB) LED can produce 7 different vibrant colors with smooth transitions, offering stunning visual effects without the need for any external driver. Simply connect it directly to 220V AC, making it ideal for homes, shops, studios, showcases, festivals, and creative lighting installations. The color-changing mode cycles through multiple colors including Red, Green, Blue, Pink, Yellow, Cyan, and White, giving you a complete multicolor experience. With long life, low heat, and high efficiency, this DOB LED module is perfect for replacing old bulbs or creating your own custom lighting solutions. ⭐ Key Features 7-in-1 Multicolor DOB LED Module Produces 7 vibrant colors with automatic color-changing mode 220V AC Direct Input – No external driver required High brightness & wide beam for strong illumination Perfect for DIY lamp projects, decorative lights, and ambience lighting Low power consumption with high efficiency Stable performance with long operating life Compact and easy to install on metal heatsinks or lamp housings 🔧 Typical Specifications Input Voltage: 220V AC Type: DOB (Direct On Board) LED Colors: Red, Green, Blue, Yellow, Cyan, Pink, White Mode: Automatic color changing Power: (Specify wattage if you want — e.g., 3W/5W/7W/9W) Use With: Heat sink / aluminum base for long life 🎯 Applications Decorative room lighting RGB ambience lamps DIY lighting projects Showcase lighting Event & festival decorations Night lamps & wall lighting Creative custom lights Package Includes: 1X 7 IN 1 MULTICOLOR DOB COLOR CHANGING 220V
DC 24V 16mm Super Ultrasonic Mist Maker Humidifier Atomizer 12LED Alloy
[Ultrasonic Sensor] 24V Color Changing Humidifier Ultrasonic Mist Maker Water Pond Atomizer Air Humidifiers 12 LED Buy this powerful DC 24V Ultrasonic Humidifier device suitable for atomization with a plate diameter of 20 mm. It is mostly in demand for fish pot and decoration purposes in households. It’s a simple plug-and-play module in which you just have to deep down the module in water and Supply 24 volt DC supply directly from the battery or power supply Adapter and it will start working. Additionally, this 24v 12 Colourful LED Ultrasonic Humidifier 12 LED Mist Maker Fogger comes with 12 Waterproof LED with 3 different colours glowing alternately which adds the colourful mist to your decoration The fully waterproof module has a 5mm DC female jack to connect the 24V input power supply with a 1-meter long cable. Instruction to use: Deep the module in the water keeping 4 to 5 cm water level above the device Connect the power supply of 24V DC 1AMP and enjoy the fog. Use power supply at least with 1AMP output for best performance Do not deep it in water more than 5cm for maximum fog output. How does it work? Ultrasonic Humidifier Piezoelectric Transmitter module works on the principle of cavitation produced by sound waves. Just provide the power supply it will turn into an ultimate ultrasonic atomizer. Features: Huge amount of humidification High-frequency vibration produces 350ml of mist per minute, humidifying all-day Wide Application Supporting use bonsai crafts, fish tank water tanks, DIY crafts and ect. Self-contained water level sensor Automatically power off with water shortage to prevent burning of the atomizer Package Includes: 1 x DC24V 16MM 12LED Alloy Air Humidifier Mist Maker Nebulizer
Out of stock220V AC Red,Blue,Pink DOB Switch ON/OFF Color Changing LED Bulb Light Electronic Hobby Kit
[COB LED] Name : 220V AC Red,Blue,Pink DOB Material : Aluminium Type : LED Bulbs Assembly : Self Assembly Color : Multicolour Bulb Used : Led No. Of Lights : 10 & Above 220V AC Red,Blue,Pink DOB Switch ON/OFF Color Changing LED Bulb Raw Material Direct On Board MCPCB Light Electronic Hobby Kit Package Includes: 1 x 220V AC Red,Blue,Pink DOB Switch ON/OFF Color Changing LED Bulb Light Electronic Hobby Kit
Dimmable LED Light Dimmer switch brightness manual adjustable controller
[LED Controller] Description Dimmers are devices connected to a light fixture and used to lower the brightness of the light. By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output. Modern dimmers are built from semiconductors instead of variable resistors because they have higher efficiency. A variable resistor would dissipate power as heat and acts as a voltage divider. Since semiconductor or solid-state dimmers switch quickly between a low resistance “on” state and a high resistance “off” state, they dissipate very little power compared with the controlled load. Increases energy efficiency Control the lighting system Provides effective mood lighting system Ensures the longevity of your lighting devices Easy installation.
Out of stock40 Pin ZIF Socket Base
[IC Base] ZIF socket stands for Zero Insertion Force. This socket works as a test Board for IC. The device is incorporated with a lever actuator, which reduces the damage of IC leads during insertion and withdrawal, perfect test, burn-in, and programming of a dual-in-line package (DIP). It is perfect for use with ICs that require frequent changing and it comes with an armature that can be used to lock and unlock the IC to the base. Features: Ideal for programming and testing. Suitable for ICs up to 40 pins. Low contact resistance when the IC is in place. Lever action for easy insertion and removal. Package Includes: 1 x 40 Pin ZIF Socket Base.
Out of stock20 Pin ZIF Socket Base
[IC Base] ZIF socket stands for Zero Insertion Force. This socket works as a test Board for IC. The device is incorporated with a lever actuator, which reduces the damage of IC leads during insertion and withdrawal, perfect test, burn-in, and programming of a dual-in-line package (DIP). It is perfect for use with ICs that require frequent changing and it comes with an armature that can be used to lock and unlock the IC to the base. Features: Ideal for programming and testing. Suitable for ICs up to 20 pins. Easy to Remove and Program IC's Nickel-Tin Plated Contacts Low contact resistance when the IC is in place. Lever action for easy insertion and removal. Package Includes: 1 x 20 Pin ZIF Socket Base.
Out of stock4 Way/Pole Speaker Terminals Long Socket/Block/Connector With Push Release
[Terminal Connector] Description Generally designed for speakers, amplifiers, and music players, these terminals have multiple uses in applications requiring quick equipment interconnection as they come with push release and an Insert mechanism to easily interconnect two devices with the wires. The spring-loaded mechanism is very easy to use, when you want to connect the device, accomplish it just by pushing the lever down and insert the wire and when you want to release the existing wire then just bring that lever down again and now you can take out your wire and disconnect your device. This Terminal block or connector comes with easy to mount two through holes which allow the user to easily screw-mount it to any application area. It's mostly used where the devices are not in a fixed place or always in changing its place like in DJ shows or music events where the location of events keep on changing and thus the equipment/devices used also have to be mobile and need to be connected with such connectors which are easy to plug in and plug out whenever needed. Feature Used where easy accessibility and fast connection are a priority. Generally designed for speakers, amplifiers and music players, and other quick-connect devices. Easy to Mount with two mounting holes Specification Size: 64x18mm Weight: 10gm per piece. Mounting Hole Pitch: 3mm Package 1x 5 (4 Way/Pole Speaker Terminals Block/Connector With Push Release/Insert Spring Loaded Mechanism.) OR 1 x 10 (4 Way/Pole Speaker Terminals Block/Connector With Push Release/Insert Spring Loaded Mechanism.)
12V PCB Mount Sugar Cube SPDT Relay – 5 Pin 7A
[Relays] 12V PCB Mount Sugar Cube SPDT Relay – 5 Pin 7A The 12V PCB Mount Sugar Cube SPDT Relay is a compact Single Pole Double Throw (SPDT) electromagnetic relay designed for switching AC or DC loads using a microcontroller, sensor, control circuit, or other low-power trigger source. Despite its small size, this relay can be used to control loads up to 7A at 250V AC according to the provided specifications. The relay operates with a 12V DC coil and has a coil resistance of approximately 270Ω, with a nominal coil current of around 45mA. Its compact PCB-mount design makes it suitable for use in automation systems, switching circuits, security systems, control panels, DIY electronics, and embedded projects. The relay features 5 pins: two coil terminals, COM (Common), NO (Normally Open), and NC (Normally Closed). The COM terminal is switched between NO and NC when the relay coil is energized or de-energized. ⭐ Key Features SPDT (Single Pole Double Throw) relay 12V DC coil Compact Sugar Cube design PCB mounting type 5-pin configuration Coil resistance: approximately 270Ω Nominal coil current: approximately 45mA Suitable for switching AC and DC loads Maximum AC load: 7A @ 250/125V AC Compact and easy to install Suitable for microcontroller and sensor-controlled switching Useful for automation and control applications 📋 Technical Specifications Product Type: PCB Mount Relay Relay Type: SPDT Contact Configuration: 1 Form C Number of Pins: 5 Coil Voltage: 12V DC Trigger Voltage: 12V DC Coil Resistance: 270Ω Trigger / Nominal Coil Current: Approximately 45mA Maximum AC Load Current: 7A @ 250/125V AC Maximum DC Load Current: 10A @ 24/120V DC as specified Operating Time: 10ms Release Time: 5ms Mounting Type: PCB Mount Contact Terminals: COM / NO / NC Coil Terminals: Coil End 1 / Coil End 2 🔌 Pin Configuration Coil End 1: One terminal of the 12V DC relay coil Coil End 2: Other terminal of the 12V DC relay coil COM: Common contact connected to the load circuit NO: Normally Open contact NC: Normally Closed contact When the relay coil is not energized, COM is connected to NC. When the 12V DC coil is energized, the internal contact switches from NC to NO. 🛠️ How It Works Connect the relay coil terminals to a suitable 12V DC control supply. When the coil is energized, the internal contact changes state and switches the connected load between the NC and NO terminals. For an NC connection, the load can remain connected before the relay is triggered. For an NO connection, the load remains disconnected until the relay coil is energized. The relay allows a low-power control circuit such as a microcontroller, sensor, timer, or automation controller to control a higher-current electrical load. 🔧 Applications Microcontroller Projects Arduino Projects Sensor-Controlled Switching Home Automation Security Systems Switching Circuits Motor Control Lighting Control Fan Control PCB Control Boards Embedded Electronics Industrial Control Systems DIY Electronics Projects 📦 Package Includes 1 × 12V PCB Mount Sugar Cube SPDT Relay – 5 Pin ⚠️ Precautions Use a 12V DC supply for the relay coil. Do not exceed the specified contact voltage and current ratings. Ensure correct identification of COM, NO, NC, and coil terminals before wiring. Use suitable protection circuitry when driving the relay coil from sensitive electronic circuits. For inductive loads such as motors and solenoids, use appropriate suppression/protection components. Ensure proper PCB insulation and clearance when switching mains voltage. Disconnect power before changing or modifying wiring. Do not touch exposed mains-voltage terminals during operation. ally Open) then the load remains OFF before trigger. These relays are usually used in home automation, switching circuits, securi