All products · 9 of 1440
Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
AC-DC 100-220V to 12V 1.3A 15.6W SMPS Power Supply Module Switching Power Board
[SMPS] The AC-DC 100-220V to 12V 1.3A 15.6W SMPS Power Supply Module is a compact switching power supply designed to provide a stable and regulated 12V DC output from standard AC mains input. With high conversion efficiency and built-in protection features, it is suitable for a wide range of electronic and industrial applications. In addition, the module accepts a broad 100V to 220V AC input range, making it compatible with various power systems. As a result, it can be used in DIY electronics, automation systems, LED lighting projects, CCTV installations, and embedded devices. Because of its efficient SMPS design, the module offers low power loss and reduced heat generation. Furthermore, the compact PCB layout allows easy integration into projects where space is limited. The power supply includes protection against overcurrent and short circuits, helping improve operational safety and reliability. Moreover, the regulated 12V output ensures stable performance for connected devices and electronic circuits. This power module is widely used in LED strips, surveillance systems, smart home devices, industrial control systems, communication equipment, and DIY electronics projects. 🔹 Key Features Wide AC input voltage range Stable regulated 12V DC output Maximum output current of 1.3A High-efficiency switching power supply design Compact and lightweight module Built-in overcurrent protection Built-in short-circuit protection Low heat generation Reliable and long-lasting performance Easy integration into electronic projects 🔹 Technical Specifications Product Type: AC-DC SMPS Power Supply Module Input Voltage Range: 100V – 220V AC Input Frequency: 50Hz – 60Hz Output Voltage: 12V DC Output Current: 1.3A Output Power: 15.6W Efficiency: Up to 86% Overcurrent Protection: Yes Short Circuit Protection: Yes Operating Temperature: -20°C to +80°C Dimensions: 96 × 32 × 16 mm Weight: Approximately 43g 🔹 Applications This SMPS module is suitable for: LED strip lighting CCTV camera systems Smart home devices Automation projects Industrial control systems Communication equipment Arduino projects ESP32 and IoT systems DIY electronics projects 🔹 Package Includes 1 × AC-DC 100-220V to 12V 1.3A 15.6W SMPS Power Supply Module
HLK-5M05 Hi-Link 5V 5W AC to DC Power Supply Module Isolated SMPS PCB Mount
[AC DC Power Supply Module] The HLK-5M05 Hi-Link 5V 5W AC to DC Power Supply Module is a compact isolated switching power supply designed for converting high-voltage AC input into a stable 5V DC output. It is widely used in embedded systems, automation projects, smart home devices, and industrial electronics. Unlike traditional transformer-based power supplies, this module integrates advanced switching power technology into a compact PCB-mount design. As a result, it offers high efficiency, low heat generation, and reliable long-term performance. In addition, the module supports a wide input voltage range from 90V AC to 264V AC, making it suitable for global power standards. Furthermore, the isolated design improves safety and helps protect connected electronic circuits. The HLK-5M05 includes built-in short-circuit, overload, and overcurrent protection, ensuring safe and stable operation. Moreover, its low ripple and low noise output make it suitable for sensitive electronic devices and microcontroller circuits. Because of its ultra-compact size and PCB mounting capability, the module is easy to integrate into custom electronic products and DIY projects. Therefore, it is commonly used in IoT systems, smart switches, automation controllers, industrial instruments, and communication equipment. 🔹 Key Features Stable 5V DC output 5W isolated switching power supply Wide AC input voltage support Compact PCB mount design Low ripple and low noise output Built-in overload and short-circuit protection High efficiency and reliability UL and CE compliant design Low no-load power consumption Suitable for industrial and DIY applications 🔹 Technical Specifications Model: HLK-5M05 Product Type: AC to DC Switching Power Supply Module Input Voltage: 90V – 264V AC Rated Input Voltage: 100V – 240V AC Output Voltage: 5V DC Output Power: 5W Maximum Output Current: 1000mA Short-Term Peak Current: ≥1200mA Input Frequency: 50/60Hz Maximum Input Current: ≤0.2A Efficiency at 220V AC: ≥70% Efficiency at 110V AC: ≥69% Ripple & Noise: ≤70mVp-p Voltage Regulation: ±0.2% Load Regulation: ±0.5% Isolation Type: High Isolation Cooling Method: Natural Air Cooling Working Temperature: -20°C to +60°C Storage Temperature: -40°C to +80°C Relative Humidity: 5% – 95% RH Mounting Type: PCB Mount Safety Protection: Overload & Short-Circuit Protection 🔹 Applications This AC to DC module is suitable for many electronic and industrial applications, including: Smart home systems IoT devices Automation controllers Industrial control systems Communication equipment DIY electronics projects Embedded systems Power supply circuits 🔹 Package Includes 1 × HLK-5M05 Hi-Link 5V 5W AC to DC Power Supply Module
0.28 inch Digital Voltmeter Ammeter DC 100V 50A LED Amp Volt Meter With Shunt
[Ammeter and Voltmeter] The 0.28 Inch Digital DC Voltmeter Ammeter 100V 50A with Shunt is a compact and high-accuracy dual LED panel meter designed to measure DC voltage and current simultaneously on a single display. With a measurement range of up to 100V DC and 50A, this meter is ideal for monitoring battery systems, power supplies, solar setups, chargers, and DIY electronics projects. This panel meter features a bright dual LED display that clearly shows voltage and current values at the same time, making real-time monitoring easy and convenient. Its small size and lightweight design allow easy installation in panels, enclosures, and control boxes. The module comes with two wiring harnesses — one for powering the meter (red and black pair) and another for measurement and shunt connection. The meter operates from an independent 5V power supply (recommended) for best accuracy. While it can be powered from 6–30V DC, using the same supply as the measured source may slightly affect current readings. A 50A external shunt is included for accurate current measurement. Different wiring variants may be shipped, but functionality remains the same. This meter is an excellent choice for battery packs, solar systems, DC power supplies, electric vehicles, inverters, and lab projects. ⭐ KEY FEATURES ✔ Measures DC Voltage up to 100V✔ Measures DC Current up to 50A (with included shunt)✔ Dual LED Display – Shows volts & amps simultaneously✔ 0.28 Inch Compact Panel Size✔ High resolution 0.1V measurement✔ Small, lightweight & easy to install✔ Separate power input harness for stable readings✔ Ideal for battery & DC system monitoring✔ Brand new, high-quality module 🔧 TECHNICAL SPECIFICATIONS Display Size: 0.28 inch LED Voltage Measurement Range: 0 – 100V DC Current Measurement Range: 0 – 50A DC Voltage Resolution: 0.1V Meter Power Supply: 5V DC (recommended) Supply Range: 6V – 30V DC (separate supply preferred) Display Type: Dual LED (Volt + Amp) Shunt: External 50A shunt included Mounting Type: Panel mount Wiring: Dual harness (power + measurement) ⚠️ IMPORTANT NOTES Use a separate 5V supply for best accuracy If input voltage is above 5V, use a buck converter Wiring color/order variants may differ but function is same Incorrect wiring can damage the module 🎯 APPLICATIONS Battery monitoring systems Solar power setups DC power supplies EV & e-bike systems Inverter projects DIY electronics labs Charging stations 📦 PACKAGE INCLUDES 1 × 0.28″ Dual LED DC Volt Ammeter Panel Meter 1 × 50A Current Shunt
Out of stock0.28 inch DC 100V 100A LED Digital Ammeter-Voltmeter With Shunt
[Ammeter and Voltmeter] This is 0.28 inch DC 100V 100A LED Digital Ammeter–Voltmeter With Shunt. This meter will measure up to 100 VDC with a 0.1-volt resolution. One thing to note is, this meter has 2 wiring harnesses. One harness is to provide power for the meters, that’s the 2 poles with a RED and a BLACK lead. Small size, portable, the magnitudes of voltage, and current are displayed on the same screen at the same time. This can be supplied anywhere from 6 volts DC up to 30 VDC. This is a separate power supply that is isolated from the source, it is possible to use the same supply but it seems to affect the amp meter reading. The 3 wire harness is used for a ground that connects directly to the battery or supply ground of the load. Note: There are different wiring variants with the same working functionality is available which will be shipped randomly. If the input voltage is more than 5V then please use the buck converter. Features : It measures up to 100V and 100A DC. Very handy and small in size. It requires a power supply of 5V. 100% Brand new and high quality. Package Includes: 1 x Dual LED Panel Ampere Voltage Meter. 1 x Current Shunt.
Digital Voltmeter (0-100V) and Ammeter (10 A) Dual Led Voltage Current Measurement Module
Specifications:- Input Voltage – 4.5V to 30V DC Input Current – <= 20mA Display Color – Red (Voltage) , Blue (Current) Measuring Voltage Range – 0V to 100V DC Measuring Currrent Range – 0A to 10A Measurement Accuracy – 1% Minimum Voltage Resolution – 0.1V Minimum Current Resolution – 0.01A Size – 48x29x21mm Note:- Maximum Input Voltage should not exceed 30V otherwise there is a danger of burning Wiring:- Black line (thin): vacant or buck circuit (module) Negative Red line (thin): power supply Positive Black line (thick): COM, common measuring Red line (thick): PW+, measuring terminal voltage input positive Yellow line (thick): IN+, current input Positive Package Contains:- 1 x Digital Voltmeter & Ammeter Module 1 x Two wire thin connector 1 x Three wire thin connector
0.28inch 0-100V Three Wire DC Voltmeter
[Ammeter and Voltmeter] This is tiny and compact digital voltmeter with a yellow LED Display. The DC 0-100V 3 Wire Yellow LED Display Digital Voltage Voltmeter Panel requires only a few minutes of configuration and is as simple as directly connecting wires to the source you want to measure and seeing the LED blink!!!! The red wire is to connect to the positive pole, the black wire is to connect to negative pole and the yellow/white wire is to connect to the positive pole of that source or another source across which we meant to measure the voltage. While measuring the supply voltage of another source make sure that negative pole is joined common. No need to worry even if there is any connection mismatch of the wires, the electric circuit won’t be a boom because it features reverse polarity protection. To reach the best measurement accuracy, this voltmeter will automatically move the decimal point’s position according to the different measuring voltage. When it measures the voltage below 10V, it will display two places after the decimal point. When it measures the voltage above 10V, it will display one place after the decimal point. This voltmeter can be used to measure the storage battery’s voltage in motorcycles and cars and also can grasp the storage battery’s status. It also can be used to measure other voltage. 100V is the voltmeter’s maximum operating limited voltage, please leave enough margin when working, to avoid voltmeter’s permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. Very bight and decent LED Display is ready to measure the dc voltages in the range of 0V to 100V. Connections : Red Wire: Positive of the Power supply Black Wire: Negative of the Power supply and also used as the negative of the measurement voltage source Yellow/White/Blue: Positive of the measurement voltage source CASE 1: If you have only one power source to give Power as well as to measure the voltage CASE 2: If you have to measure the voltage of another source then Note: The display weight and Dimensions may have ±2% error. Features : Very small and lightweight voltmeter module. Very handy and easy to use. Red/Green/Blue/Yellow LED display. Best operates in the working voltage range of 5V to 24V 100% Brand new and high quality. Package Includes : 1 x Red/Green/Blue/Yellow LED Display 3 Wire Digital Voltage Voltmeter Panel
Out of stockIRF540N (TO-220-3) MOSFET
[Mosfet] The IRF540N (TO-220-3) MOSFET from International Rectifier is 100V single N channel HEXFET power MOSFET in TO-220AB package. This MOSFET features extremely low on-resistance per silicon area, dynamic dv/dt rating, rugged, fast switching and fully avalanche rated as a result, power MOSFET is well known to provide extremely efficiency and reliability which can be used in wide variety of applications. Features: Drain to source voltage Vds is 100V Gate to source voltage is ±20V On Resistance Rds(on) of 44mohm at Vgs of 10V Power dissipation Pd of 130W at 25°C Continuous drain current Id of 33A at Vgs 10V and 25°C Operating junction temperature range from -55°C to 175°C Applications: Power Management, Industrial, Portable Devices, Consumer Electronics. Package Includes: 1 x IRF540N (TO-220-3) MOSFET
IRF3205 MOSFET
[Mosfet] The IRF3205 MOSFET from International Rectifier is 100V single N channel HEXFET power MOSFET in the TO-220AB package. This MOSFET features extremely low on-resistance per silicon area, dynamic dv/dt rating, rugged, fast switching and fully avalanche rated as a result, power MOSFET is well known to provide extremely efficiency and reliability which can be used in a wide variety of applications. Features: Gate to source voltage is ±20V On-Resistance Rds(on) of 8mohm at Vgs of 10V Power dissipation (Pd) of 130W at 25°C Continuous drain current (Id) of 110A at Vgs 10V and 25°C Operating junction temperature range from -55°C to 175°C Applications: Power Management, Industrial, Portable Devices, Consumer Electronics. Package Includes: 1 x IRF3205 MOSFET
Out of stockZP4510 P45 Water Level Sensor Float Control Switch
[Water Level Sensor] A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or another device. A float switch is a device used to sense the level of liquid within a tank. The switch may actuate a pump, an indicator, an alarm, or another device. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds, basement alarms, boats, air condition drain pans, pressure washers, carpet cleaning machine, reef aquarium, fluid control, ice machines, coffee pots, marine, automotive, automobiles, tropical fish tanks, evaporator coils, condensation line, in relays, or whatever your project may be. It can be easily converted from normally open to normally close by inverting the float. Note: because the current that the switch can carry is much little(0.5A), you must use a relay or contactor when it is connected by a load, relay and contactor are not included here. Specifications:- Cable Length: 30.5(cm) Maximum Load: 50 W Max Switching Voltage: 100V DC Minimum Voltage: 250V DC Maximum Switching Current: 0.5 A Max Load Current: 1.0 A Max Contact Resistance: 0.4 ΩTemp Rating: -20~ 80 degree Applications:- Household Equipment such as overhead water tanks, Water purifiers. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or whatever your project may be. Up float switch Contains no mercury Product. How Magnetic Reed Liquid Level Sensors Work:- The purpose of a float switch is to open or close a circuit as the level of a liquid rises or falls. Most float switches are "normally closed," meaning the two wires coming from the top of the switch complete a circuit when the float is at its low point, resting on its bottom clip or stop (for example, when a tank is dry). Most float switches utilize a magnetic reed switch to open or close the circuit. The reed is encased in a glass tube, which is cemented into a plastic or stainless steel stem with epoxy. The illustration to the left demonstrates how a magnet can be used to open or close a circuit by moving it closer to or farther away from a reed switch. When the magnet comes close to the two contacts, they draw together and touch, allowing the current to pass through. When the magnet is moved away, the contacts demagnetize and separate, breaking the circuit. In a float switch, the magnetic reed switch is hermetically sealed in a stem, most often made from plastic or stainless steel. The float encases a sealed magnet, which moves up and down the length of the stem as a fluid level rises and falls. As the magnet passes by the contacts in the encased reed switch, they draw together and complete a circuit between the two lead wires. The operation shown can usually be reversed by removing the bottom clip from the switch, inverting the float, and replacing the clip. When this change is made, the switch circuit will be open when the float is resting on the bottom clip and closed when the float rises. Properly used, float switches can deliver millions of on/off cycles, for years of dependable operation. Failures are normally due to overloading, frequently caused by spiking voltage. Before designing a circuit that uses a float switch, be sure to read our Technical Page on Spiking Voltage & Float Switches. * Product Images are shown for illustrative purposes only and may differ from the actual products.