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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Logitech MX Master 4 Wireless Ergonomic Mouse (Graphite)
[Mouse] Logitech MX Master 4 Wireless Ergonomic Productivity Mouse - Graphite The gold standard in productivity. Features Quiet Clicks, 8,000 DPI Darkfield sensor that tracks anywhere (even on glass), MagSpeed electromagnetic scrolling up to 1,000 lines per second, and multi-device Logi Bolt + Bluetooth connectivity. ⭐ Key Features - MagSpeed Electromagnetic Scrolling: Ultra-fast, ultra-quiet, pixel-precise - 8,000 DPI Darkfield High Precision sensor tracks on any surface including glass - Quiet Click buttons reduce click noise by 90% - Cross-computer Flow control between up to 3 PCs or Macs - USB-C Quick Charging: Up to 70 days battery life on full charge; 3 hours from 1 minute charge 📋 Technical Specifications - Sensor: Darkfield high precision (200 - 8000 DPI) - Buttons: 7 buttons (Left/Right, Back/Forward, App-Switch, Wheel mode-shift, Middle click) - Wireless: Bluetooth Low Energy + Logi Bolt USB Receiver (10m range) - Battery: Rechargeable Li-Po (500 mAh) - Weight: 141 grams 📦 Package Includes - 1 x Logitech MX Master 4 Mouse (Graphite) - 1 x Logi Bolt USB Receiver - 1 x USB-C Charging Cable
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.
Out of stock2 inch 15 Watt 3-4 Ohm Speaker 53mm Diameter good Quality
[Speakers] Description This is a general-purpose 3-4 Ohm 15 Watt Speaker that can be used for a variety of audio projects. It has a balanced frequency response and is extremely efficient. Excellent high-frequency response. It is a type of transducer that converts electromagnetic energy into sound waves. It converts analog signal inputs from computers or audio players into sound waves. Because of its small size, it can be used in a variety of applications where space is limited. It can be used in Doorbells, Bluetooth speakers, music systems, Alarms and various other projects. Specifications Impedance 3-4 ohms Power 15 Watt Speaker Dimension 53mm*53mm Thickness 29.4mm Magnet Diameter 44.0mm Shape Top Round, Square Frame Material Metal, Magnet & Plastic Color Black & Silver Magnet Type External Quantity 1 Pieces Country of Origin China
Out of stockSmall Active Electromagnetic Buzzer B10
[Buzzer And Mic] This is a Small PCB Mountable 5V Active Electromagnetic Buzzer. It is great to add Audio Alert to your electronic designs. It operates on a 5V supply, uses a coil element to generate an audible tone. Beep Sound Voltage : 2 – 5VDC Maximum current : 30mA/5VDC Decibel : > 85db/10cm Resonant frequency : 2500Hz (+/- 300 HZ) Operating Temperature : -20 to 70 C
Out of stockMagnetic Reed Switch Sensor Module
[Magnetic Sensor] Magnetic Control Module Reed Switch Sensor This module can be applied in Program-controlled switches, copiers, washing machines, refrigerators, cameras, Disinfection cabinets, doors, window magnetic, electromagnetic relays, electronic weighing, level meters, gas meters, water meters, and so on. Specifications and Features: Clean, good waveform driving ability, more than 15mA. Working voltage 3.3V-5 Output format: digital switching output (0 and 1) A fixed bolt hole for easy installation PCB size: 3.2cm x 1.4cm Digital output using a voltage LM393 comparator IC Package Includes: 1 x Reed Switch Module
Out of stockDC 12V Cabinet Door Lock Electric Lock Assembly Solenoid
[Solenoids and Electromagnets] 12V Electronic Door Lock assembly Solenoid low power consumption This DC 12V Cabinet Door Lock Electric Lock Assembly Solenoid can be used for locking sell-machine, storage shelf, file cabinet and etc. The hidden way of unlocking can be used for an emergency. The lock works as the circuits disconnects, and it will unlock as the instant power-on. It is steady, durable, and energy-saving and had a long lifespan. In the anti-theft and shockproof design, the lock is better than other kinds of locks. After connecting the wires and when the current is available, the electric lock can control the door’s opening and closing. Note: Take care of polarity while making the connection without connector (i.e. Red wire should be connected to the positive and Black wire to negative.) Features: Iron Body Material High quality ultra-compact electric lock. Rustproof, durable, safe, convenient to use. Suction tightly sucks the iron, thus locking the door. Applicable for being installed in the escape door or fire door electronic controlled system. Adopts the principle of electric magnetism, when the current through the silicon, the electromagnetic lock will achieve a strong. Model DC 12V Cabinet Door Lock Rated Operating Voltage (VDC) 12 Rated Current (mA) 0.80A. Power Consumption (Watt) 9.6 Holding Force (N) 2.45 Unlocking Time 1 sec Body Material Iron Metal Energized forms Intermittent Cable Length (cm) 25 Weight (gm) 150 * Product Images are shown for illustrative purposes only and may differ from actual product.
1 Channel 12V Relay Module without Optocoupler
[Relay Module] 🔌 12V 1 Channel 7A Relay Module for Arduino, Raspberry Pi & Microcontrollers 12V Trigger • 7A Relay • Compact Design • Ideal for Automation & DIY Projects The 12V 1 Channel 7A Relay Module is a compact and reliable relay board designed to control AC and DC loads using low-voltage control signals from microcontrollers and development boards. Operating on a 12V DC trigger voltage, it can be directly interfaced with Arduino, Raspberry Pi, ESP32, ESP8266, AVR, PIC, 8051, ARM, and other embedded systems. The module is equipped with a high-quality 7A electromagnetic relay capable of switching 250V AC or 30V DC loads. It features LED indicators for power and relay status, making debugging and operation simple. Standard header pins allow easy connection to development boards, while screw terminals provide secure wiring for external loads. This relay module is ideal for home automation, industrial control, IoT projects, robotics, lighting control, motor switching, and various DIY electronics applications. ⭐ Features Single-channel 12V relay module High-quality 7A electromagnetic relay Compatible with Arduino, Raspberry Pi, ESP32, AVR, PIC, ARM and more 12V DC trigger input LED power and relay status indicators Standard header pin interface Screw terminal output connections Compact PCB design Reliable and stable operation Easy installation 📋 Technical Specifications Product Type: Relay Module Relay Channels: 1 Operating Voltage: 12V DC Trigger Voltage: 12V DC Trigger Current: Approx. 20mA Maximum Switching Voltage (AC): 250V AC Maximum Switching Current (AC): 7A Maximum Switching Voltage (DC): 30V DC Maximum Switching Current (DC): 7A Relay Contact Type: SPDT (NO / NC / COM) Connection Type: Screw Terminal + Header Pins Operating Temperature: -40°C to +85°C Board Dimensions: Approx. 48 × 29 × 17 mm (May vary slightly by manufacturer) Weight: Approx. 15g 🔧 Applications Suitable for: Arduino Projects Raspberry Pi Projects ESP32 & ESP8266 Projects Home Automation Industrial Automation Smart Switches Lighting Control Fan Control Pump Control Small Motor Switching Security Systems Robotics IoT Projects DIY Electronics 📦 Package Includes 1 × 12V 1 Channel 7A Relay Module ⚠️ Note This module is intended for switching high-voltage AC/DC loads. Always disconnect power before wiring. Product images are for illustrative purposes only. The actual product may vary slightly depending on the manufacturing batch.
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
5V 10A PCB Mount Relay SPDT 5 Pin Electromechanical Relay for DIY Electronics
[Relays] Description: The 5V DC Relay Coil 10A SPDT Relay is a high-quality electromagnetic relay designed for reliable AC and DC load switching applications. It operates using a 5V DC coil voltage, making it suitable for Arduino boards, microcontrollers, IoT devices, and automation circuits. In addition, the relay supports switching loads up to 10A, allowing users to control high-power devices safely using low-voltage control signals. As a result, it is widely used in home automation systems, robotics projects, smart switching circuits, and industrial electronics. Because of its SPDT (Single Pole Double Throw) contact configuration, the relay can switch between Normally Open (NO) and Normally Closed (NC) outputs. Furthermore, the through-hole PCB mounting design allows easy installation on circuit boards and custom electronic projects. The relay supports both AC and DC load switching, including 250V AC at 10A and 30V DC at 10A. Moreover, the sealed plastic housing provides high isolation between the coil and contacts, improving safety and durability. This relay is commonly used for controlling lights, fans, motors, pumps, appliances, and power control systems in DIY as well as industrial applications. 🔹 Key Features 5V DC electromagnetic relay SPDT contact configuration (COM, NO, NC) Supports AC and DC load switching High current handling up to 10A Through-hole PCB mounting design High isolation between coil and contacts Long mechanical and electrical life Suitable for Arduino and automation projects 🔹 Technical Specifications Product Type: Electromagnetic Relay Coil Voltage: 5V DC Contact Rating: 10A Rated Load: 250V AC @ 10A (50/60Hz) Rated Load: 30V DC @ 10A Contact Type: SPDT (COM, NO, NC) Frequency: 50 / 60 Hz Coil Resistance: Approx. 70–100Ω Mounting Type: Through-Hole PCB Mount Isolation: High Isolation Between Coil & Contacts Switching Life: Long Mechanical & Electrical Life 🔹 Applications This relay is suitable for many electronic and electrical applications, including: Arduino projects Home automation systems Industrial automation Robotics projects Smart switching systems Motor and pump control Power supply circuits DIY electronics projects 🔹 Package Includes 1 × 5V 10A PCB Mount Relay 5 Pin