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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Elgato Stream Deck Mk.2
15 customisable LCD keys for OBS / Stream Software. Plugin ecosystem covers most apps.
TP-Link Deco X20 (WiFi 6 Mesh, 3-pack)
Whole-home WiFi 6 mesh. AX1800 each unit, covers ~5800 sq ft. Easy phone-app setup.
Logitech G840 XL Cloth Mouse Pad
900 × 400 × 3 mm. Smooth fabric surface, rubber base. Covers keyboard + mouse area.
Out of stockPCI Slot Cover Bracket (3 pc)
Black perforated rear slot covers, EMI-shielded.
Out of stockGold AP-55 TPA3116D2 2×50W Bluetooth Stereo Digital Amplifier Board with USB, TF Card, FM & Remote
[Amplifier Board] Gold AP-55 TPA3116D2 2×50W Bluetooth Stereo Digital Amplifier Board with USB, TF Card, FM & Remote The Gold AP-55 is a compact Class-D stereo digital audio amplifier board based on the TPA3116D2 amplifier IC, designed for DIY Bluetooth speakers, home audio systems, portable speakers, bookshelf speakers, multimedia systems, and custom audio projects. Available product listings consistently identify the AP-55 as a dual-channel 50W + 50W amplifier, with a DC input range around 8–24V or 12–24V depending on the listing/version. The AP-55 combines the power amplifier with a multimedia player supporting Bluetooth 5.0, USB, TF/SD card, FM radio and AUX input. The Bluetooth device name is reported as GD-82EM, while the FM tuner covers 87.5–108.0MHz. It also includes an infrared remote control and a digital display for convenient operation. The TPA3116D2 Class-D amplifier provides efficient stereo amplification, making the board suitable for building compact but powerful audio systems. One detailed listing specifies support for 4Ω–8Ω speakers, with the commonly advertised maximum output of 50W per channel. ⭐ Key Features Gold AP-55 amplifier module TPA3116D2 Class-D amplifier IC 50W + 50W dual-channel stereo output Supports 4Ω–8Ω speakers Bluetooth 5.0 wireless audio Bluetooth device name: GD-82EM Built-in USB music player Built-in TF / SD card player Built-in FM radio FM frequency range 87.5–108.0MHz 3.5mm AUX input Infrared remote control Digital display Supports MP3 / WMA / WAV Power-off memory function Remembers the previous song and volume Compact design for DIY speaker projects High-efficiency Class-D amplification 📋 Technical Specifications Product Type: Stereo Class-D Digital Amplifier Board Model: Gold AP-55 Amplifier IC: TPA3116D2 Amplifier Class: Class-D Number of Channels: 2 / Stereo Output Power: 50W + 50W Maximum Total Output: 100W Speaker Impedance: 4Ω–8Ω Input Voltage: DC 8–24V (some listings specify 12–24V; verify the exact board version before use) Bluetooth Version: 5.0 Bluetooth Name: GD-82EM Bluetooth Range: Up to approximately 10–15m under suitable conditions Audio Formats: MP3 / WMA / WAV USB Support: Yes TF/SD Card Support: Yes FM Radio: Yes FM Frequency: 87.5–108.0MHz AUX Input: 3.5mm / Wired Audio Input Remote Control: IR Remote Remote Range: Approximately 4–7m Display: Digital Display Power-Off Memory: Yes Memory Function: Last song and volume Audio Input Modes: Bluetooth / USB / TF Card / FM / AUX Output: Dual-Channel Stereo Efficiency: Greater than 90% according to one detailed listing SNR: Approximately 102dB according to one detailed listing Distortion: Below 0.1% at normal listening levels according to one detailed listing Board Size: Approximately 70 × 50 × 20mm with shell, according to one listing 🎵 Audio & Playback Functions The AP-55 can switch between Bluetooth, USB, TF/SD Card, FM Radio and AUX sources. When Bluetooth mode is selected, users can pair a phone or other compatible device with GD-82EM. USB and TF/SD cards can be used for local music playback, while AUX provides a wired audio input. 📻 FM Radio The built-in FM tuner supports the 87.5–108.0MHz broadcast band. FM stations can be searched and selected using the onboard controls or remote control. 🎛️ Controls & Remote The module provides controls for functions such as previous track, next track, volume up, volume down, play/pause, mode selection and FM station selection. The infrared remote provides additional wireless control of playback, volume, mode and other supported functions. 🔧 Applications DIY Bluetooth Speakers High-Power Bluetooth Speaker Projects Portable Speaker Systems Bookshelf Speaker Systems Home Audio Projects Multimedia Speaker Systems USB MP3 Speaker Systems TF/SD Card Music Players FM Radio Speaker Projects Car Audio Projects Custom Wooden Speaker Cabinets Desktop Audio Systems Electronics DIY Projects 🛠️ Installation Connect a suitable DC power supply within the specified voltage range and observe the correct polarity. Connect the left and right speaker outputs to compatible 4Ω–8Ω speakers. Select Bluetooth, USB, TF/SD, FM or AUX according to the desired audio source. For maximum advertised output, a suitable 24V high-current power supply is recommended by one vendor; at lower supply voltages, available output power will be lower. 📦 Package Includes 1 × Gold AP-55 TPA3116D2 2×50W Bluetooth Amplifier Board 1 × IR Remote Control 1 × Required Connecting Wires/Cables (package contents may vary by seller/version) ⚠️ Precautions Verify the exact input voltage requirement of your AP-55 version before powering it. Do not exceed 24V DC where the board specification limits input to 24V. Check power polarity carefully before connection. Use speakers with a compatible 4Ω–8Ω impedance. Do not short-circuit the speaker output terminals. Ensure adequate ventilation during high-power operation. Use a suitable high-current power supply for high-output operation. Do not connect the speaker outputs together or directly to ground. Keep the board away from moisture and conductive materials. Incorrect wiring or excessive voltage can permanently damage the amplifier IC.
Metal Alligator Prong Clips Electrical Clamp 50 mm
[Power Connector] The 50mm Metal Alligator Clip (Crocodile Clip) Set is a durable electrical test accessory designed for temporary electrical connections in testing, measurement, and prototyping applications. Manufactured from high-quality conductive metal with insulated protective sleeves, these clips provide excellent electrical conductivity and secure clamping performance. The spring-loaded wide-opening jaws firmly grip wires, terminals, battery posts, PCB test points, and other electrical contacts, making them ideal for use with multimeters, power supplies, battery chargers, laboratory equipment, and DIY electronic projects. The insulated red and black protective covers help identify positive and negative connections while providing additional safety during operation. Their compact size and lightweight design make them suitable for hobbyists, technicians, students, and professionals. 🔹 Key Features High-quality metal alligator clips Strong spring-loaded jaws Wide opening for secure grip Insulated protective covers Excellent electrical conductivity Durable corrosion-resistant construction Easy wire attachment by soldering or crimping Lightweight and compact Suitable for low-voltage electrical testing Reusable and long service life 🔹 Technical Specifications Product Type: Alligator Clip / Crocodile Clip Material: Nickel-Plated Steel Insulation Material: PVC Clip Length: 50mm Available Sizes: 40mm (Short) / 50mm (Long) Jaw Type: Spring Loaded Color: Red & Black Weight: Approx. 8g (Pair) Connection Type: Crimp / Solder Application: Electrical Testing & Temporary Connections 🔹 Applications Suitable for: Digital multimeters Power supplies Battery testing Arduino projects Raspberry Pi projects Electronics prototyping Laboratory experiments School science projects DIY electronics Automotive electrical testing PCB testing Temporary electrical connections 🔹 Package Includes 1 × Red 50mm Alligator Clip 1 × Black 50mm Alligator Clip
Waterproof Case Switch Covers Caps Protector for Boat Rocker Switch
[Mechanical Switches] Clear Silicone Waterproof Rocker Switch Protector Cover Cap Transparent Rocker Switch Cover • Waterproof & Dustproof • Flexible Silicone Protection • Durable Switch Guard The Clear Silicone Waterproof Rocker Switch Protector Cover Cap is a flexible protective cover designed to shield rocker switches from water, dust, moisture, dirt, and accidental contact. Made from high-quality transparent silicone, this cover provides reliable protection while allowing the switch position to remain clearly visible. Its soft and flexible construction makes installation quick and easy, and it fits a wide range of standard-size rocker switches used in automotive, marine, industrial, household, and DIY electronic applications. The cover helps extend switch life by preventing contamination and reducing wear caused by environmental exposure. Ideal for cars, motorcycles, boats, electrical control panels, industrial equipment, power supplies, DIY projects, and outdoor electronic devices, this protector cap offers a simple and effective way to improve switch durability and reliability. ⭐ Key Features Transparent clear silicone design Waterproof and dustproof protection Protects rocker switches from moisture and dirt Flexible and durable silicone construction Easy installation and removal Allows clear visibility of switch position Helps extend switch lifespan Suitable for indoor and outdoor use Lightweight and compact Compatible with various standard-size rocker switches 📋 Technical Specifications Product Type: Rocker Switch Protector Cover Cap Color: Clear / Transparent Material: Silicone and Plastic Protection Type: Waterproof and Dustproof Compatibility: Standard-Size Rocker Switches Installation: Push-Fit Operating Temperature: Suitable for General Electronic Applications Reusable: Yes 🔧 Applications Rocker Switch Protection Automotive Switch Panels Marine and Boat Switches Motorcycle Electrical Systems Industrial Control Panels Power Supply Units Household Electrical Equipment DIY Electronics Projects Outdoor Electrical Installations Dust and Moisture Protection Applications 📦 Package Includes 1 × Clear Silicone Waterproof Rocker Switch Protector Cover Cap ⚠️ Note Ensure the cover size matches your rocker switch dimensions before installation. Designed for water and dust protection, not for complete submersion. Product appearance may vary slightly depending on the manufacturing batch.