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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Snap Circuit Kit
Circuit modules with snap connectors. Power: 2×AA / 3×AA / 9V (kit dependent). Components: switches, LEDs, buzzer, motor, resistors, capacitors. No soldering. Safe low-voltage learning.
Breadboard Kit
Breadboard: 400/830 tie-points. Jumpers: M-M, M-F. Common parts: resistors (¼W), LEDs, push buttons, potentiometer. Modules: LDR, buzzer, IR, PIR, relay. Power module: 3.3V/5V rails (optional).
Only 2 leftOtto
Biped robot kit. Servos: 4 micro servos (legs/feet). MCU: Arduino Nano compatible. Sensors: ultrasonic + buzzer. Power: 5V (battery pack). Programming: Arduino IDE / block coding. Functions: walk/dance/avoid.
MAS830L Digital LCD Multimeter with Backlight | AC/DC Voltage Current Resistance Tester
[Measuring Instruments] The MAS830L Digital LCD Pocket Multimeter with Backlight is a compact, accurate, and reliable electrical measuring instrument designed for everyday testing and troubleshooting. Built for technicians, students, hobbyists, and DIY electronics users, this multimeter supports measurement of AC voltage, DC voltage, DC current, resistance, continuity, and diode testing in a convenient handheld format. Equipped with a clear LCD display and built-in backlight, the MAS830L allows easy reading of measurements even in low-light working conditions. Its manual range selector dial provides simple and precise control over measurement ranges, while automatic polarity indication helps prevent reading errors. Designed with durability and portability in mind, this pocket-size multimeter features a strong impact-resistant body and lightweight construction, making it ideal for both field work and bench testing. The included test leads allow immediate use for checking batteries, circuits, wiring, power supplies, and electronic components. With stable performance, essential protection features, and user-friendly operation, the MAS830L is an excellent choice for electrical maintenance, electronics repair, lab experiments, educational training, and home diagnostics. Whether you are testing voltage, checking continuity, or measuring resistance, this multimeter delivers dependable results at an affordable price. ⭐ Key Features ✔ Measures AC & DC Voltage ✔ Measures DC Current ✔ Resistance Measurement ✔ Continuity Test with Buzzer ✔ Diode Test Function ✔ LCD Display with Backlight for low-light use ✔ Compact pocket-size design ✔ Manual range selection for accuracy ✔ Automatic polarity indication ✔ Lightweight and portable ✔ Ideal for beginners and professionals 🔧 Technical Specifications Model: MAS830L Display: LCD Digital with Backlight Display Count: 3½ digit (1999 count) Range Selection: Manual Polarity: Automatic indication Low Battery Indicator: Yes Measurement Ranges DC Voltage: 200mV / 2V / 20V / 200V / 600V AC Voltage: 200V / 600V DC Current: 200µA / 2mA / 20mA / 200mA / 10A Resistance: 200Ω / 2kΩ / 20kΩ / 200kΩ / 2MΩ Test Functions Continuity with buzzer Diode test Transistor hFE test (model variant dependent) Power Supply: 9V Battery (6F22) Operating Temperature: 0°C to 40°C (typical) Form Factor: Handheld / Pocket Body Material: Impact-resistant plastic 🎯 Applications Electrical troubleshooting Electronics repair & assembly Battery testing Circuit diagnostics DIY electronics projects Educational laboratories Home & industrial maintenance 📦 Package Includes 1 × Unity MAS830L Digital Multimeter 1 × Test Lead Pair 1 × User Manual (if included by batch)
Out of stockDigital Multimeter Small Yellow Color LCD AC DC Measuring Voltage Current
[Measuring Instruments] A multimeter or a multitester, also known as a VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter would include basic features such as the ability to measure voltage, current, and resistance. Analog multimeters use a microammeter whose pointer moves over a scale calibrated for all the different measurements that can be made. Digital multimeters (DMM, DVOM) display the measured value in numerals, and may also display a bar of a length proportional to the quantity being measured. Digital multimeters are now far more common than analog ones, but analog multimeters are still preferable in some cases, for example when monitoring a rapidly-varying As the name suggests it is the multifunction device for all your testing need for daily work. When testing DC voltage, AC voltage, DC current, resistance, diode, buzzer, and battery, connect the red test lead to “VΩmA” jack and black test lead to “COM” jack, whereas When you need to test the current more than 200mA, connect the red test lead to “‘ 10A≡” jack and black test lead to “COM” jack. And When while testing the temperature, connect the temperature probe to “VΩmA” jack or “COM” jack. When testing the magnifying ratio of the transistor, turn the switch to hFE position and connect the transistor to the eight hole jack available in blue color. For the Square wave output, the frequency is 50Hz, the voltage is approximately 3Vp-p. The output jack is “VΩmA” and “COM” Description Table: Features : Small size makes it comfortable in many areas Brand new product. Good for newbies with basic knowledge of VI. No warranty on this product. No replacement or refund on this product Package Include: 1 x Digital Multimeter Small Yellow color and LCD display 2 x Measuring Probes(Red and Black)
MQ-5 Methane LPG Liquid Propane Gas Sensor Module
[Gas and Dust Sensor] The Simple MQ-5 Methane LPG Liquid Propane Gas Sensor Module is a great way to add basic gas sensing to your project at a reasonable price. TheMQ-5 Methane LPG Liquid Propane Gas Sensor Module particulate sensor uses a Buzzer to sense any detected material that is even present in the air! This MQ-5 Methane LPG Liquid Propane Gas Sensor Module is widely used in gas leakage detecting pieces of equipment in family and industry, are suitable for detecting LPG, natural gas, town gas, avoid the noise of alcohol and cooking fumes and cigarette smoke The MQ5 ( MQ-5 ) is used in gas leakage detecting equipment in consumer and industry applications, this sensor is suitable for detecting LPG, natural gas, coal gas. Avoid the noise of alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer. The sensitive material of the MQ-5 gas sensor is tin Oxide (SnO2), which with lower conductivity in clean air. When the target combustible gas exists, The sensor’s conductivity is higher along with the gas concentration rising. Please use a simple electro circuit, Convert the change of conductivity to the corresponding output signal of gas concentration. MQ-5 gas sensor has a high sensitivity to Methane, Propane, and Butane, and could be used to detect both Methane and Propane. The sensor could be used to detect different combustible gas especially Methane, it is with low cost and suitable for different application Connections VCC ↔ 2.5V ~ 5.0V GND ↔ ground Aout ↔ MCU.IO (analog output) Dout ↔ MCU.IO (digital output) Note: Buzzer is not included in this package, you have to buy it separately. Features : High sensitivity to LPG, natural gas, town gas. Small sensitivity to alcohol, smoke. Stable and long life. Simple drive circuit. Fast response. Package Includes : 1 x MQ-5 Methane LPG Liquid Propane Gas Sensor Module
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.
Out of stockLipo Voltage Checker 1S-8S with Buzzer Alarm
[Li-Ion Capacity Indicator] The LiPo Battery Voltage Checker 1S-8S with Buzzer is a quality product available and a special design to measure and display the voltage of LiPo battery packs. This voltage checker can measure the voltage of the battery pack as well as the voltage of every single cell of the battery pack. This unit also features a handy built-in LED display that will show the voltage of each cell followed by the overall voltage of the pack. Don’t risk your model by flying on depleted batteries, at this price piece of mind flying can’t be any cheaper! Simply connect the battery balance plug to the leads of this voltage checker, it will show the instant voltage of each cell one by one ending with displaying the voltage of the total pack. The Li-PO Voltage Checker 1S-8S with Buzzer Alarm is equipped with loud twin piezo alarms which will notify you once your cells reach a low voltage or user defined voltage. You can customize the alarm to sound at a voltage between 2.7v-3.8v per cell in 0.10v increments. It has a mode button at the top for setting the desired voltage value. Features : Input: 1S-8S Battery Battery type: Lipo/LiFe/Li-ion/LiMn It has a Buzzer Alarm for low voltage indication. Useful for measuring each cell voltage. It has a mode button at the top for setting the desired voltage value. Package Includes : 1 x LiPo Battery Voltage Checker 1S-8S with Buzzer
Out of stockMetal detector non-contact metal induction detection module
[Induction Module] You can use this LC Metal detector non-contact metal induction detection module as a metal detector. When it approaches any metal, it makes a sound. This is a module specifically designed to detect metal. The module operates by inducing currents in metal objects and responding when it occurs. A nice onboard buzzer signals when it detects something and an onboard potentiometer allow adjustment of sensitivity. The power cables of the Metal detector non-contact metal induction detection module will need soldering on for the module to function, positive to the outside of the module and negative between the potentiometer and an electrolytic capacitor. Features : “V+” ↔ Connect to power positive “V-” ↔ connect to power negative Adjust the potentiometer, let the modules work normally. Small and easy to use module. It comes with a Buzzer for metal detection indication. Operating voltage: 5V DC. Detector distance: 1CM. Package Includes : 1 x Metal detector non contact metal induction detection module.
Out of stock9mm x 7mm Through Hole MIC Electret Microphone Condenser Pickup
[Buzzer And Mic] Electret Microphone Condenser Mic Sensitivity 9 x 7mm SMD SMT PCB Surface mount, cylinder-shaped It is a converted the voice signal to electrical signals energy conversion device Widely used in the cassette recorder, wireless microphone and voice control circuits With high resistance to vibration, high signal to noise ratio 100% Brand New and High Quality. It is back electret type
Out of stockPiezo Electric Active Big Buzzer B27
[Buzzer And Mic] 5-24V Buzzer Continues Beep – Big 27 A buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices, timers, and confirmation of user input such as a mouse click or keystroke. A piezoelectric element may be driven by an oscillating electronic circuit or other audio signal sources, driven with a piezoelectric audio amplifier. Sounds commonly used to indicate that a button has been pressed are a click, a ring, or a beep. Voltage: 5 V Sound : 90dB Housing Material: ABS Plastic. Perfect for motorcycle stand alarm, alarm clock, or any project which you need an alarm buzzer for getting immediate attention. Note: This product comes in different design patterns. We ship randomly.
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 stockHigh Current Active Alarm Buzzer Driver Module
[Current Sensor] A High Current Active Alarm Buzzer Driver Module is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric. Just like what you are viewing now, it is 5V DC Electronic Part Active Buzzer Module. Using top quality material, it is durable in use. What’s more? This active buzzer rings out as long as it is electrified. Compared with a passive buzzer, it is a bit expensive but easier to control. Typical uses of buzzers include alarm devices, timers, and confirmation of user input such as a mouse click or keystroke. A good choice for you all! Features: An active buzzer with a concussion internal source- so long as it will be called an energized. The program easy to control- SCM can let a high-low sound- while passive buzzer did not. Operating voltage 3.3V-5V PCB Dimension: 3.1cm*1.3cm. Color: Blue Easy to use Package Includes : 1 x High Current Active Alarm Buzzer Driver Module