1. Introduction
This manual provides detailed instructions for the assembly, setup, operation, and maintenance of your FICEMETOI DIY Sound Control LED Music Electronic Kit. This kit is designed for enthusiasts to practice soldering skills while building a functional audio frequency display with LED lights that react to sound.
2. Safety Information
Please read and understand all safety warnings before beginning assembly or operation. Failure to follow these instructions may result in injury or damage to the product.
- Electrical Safety: This kit involves working with electronic components. Ensure your soldering iron is in good condition and properly grounded. Avoid touching live circuits.
- Heat Hazard: Soldering irons operate at high temperatures. Use caution to prevent burns. Always place the soldering iron in a safe stand when not in use.
- Ventilation: Solder fumes can be harmful. Work in a well-ventilated area or use a fume extractor.
- Eye Protection: Always wear safety glasses to protect your eyes from solder splashes or flying component leads.
- Component Handling: Some electronic components are sensitive to static electricity. Handle them by their edges and avoid touching pins directly.
- Power Source: Only use the specified USB power source for this device. Using an incorrect power supply may damage the circuit.
3. Package Contents
Verify that all components listed below are present in your kit before starting assembly. If any parts are missing or damaged, please contact customer support.

Image: Various electronic components included in the kit, such as resistors, capacitors, LEDs, and integrated circuits.
- Printed Circuit Board (PCB)
- LEDs (various colors)
- Resistors (various values)
- Capacitors (electrolytic and ceramic)
- Integrated Circuits (ICs) and IC sockets
- Diodes
- Transistors
- Potentiometer (for sensitivity adjustment)
- Microphone module
- USB power input connector
- Audio input jack (3.5mm)
- Acrylic casing components (top, bottom, sides)
- Screws and standoffs for casing assembly
4. Assembly Instructions
Follow these steps carefully to assemble your LED Music Electronic Kit. It is recommended to work on a clean, well-lit surface.
- Component Identification: Before soldering, identify all components. Match them with the markings on the PCB. Resistors have color codes, capacitors have values, and ICs have part numbers. Pay close attention to polarity for diodes, electrolytic capacitors, and ICs.
- Solder Smallest Components First: Begin by soldering the smallest components, such as resistors and diodes. Insert them into their designated holes on the PCB, bend the leads slightly to hold them in place, and then solder. Trim excess leads after soldering.
- Install IC Sockets: If your kit includes IC sockets, solder these onto the PCB before inserting the actual ICs. This protects the ICs from heat during soldering. Ensure the notch on the socket aligns with the notch on the PCB silkscreen.
- Solder Capacitors and Transistors: Proceed with ceramic capacitors, then electrolytic capacitors (observing polarity: the longer lead is usually positive, and a stripe on the capacitor indicates the negative lead). Solder transistors, ensuring correct orientation.
- Solder LEDs: LEDs are polarized. The longer lead is typically the anode (+) and the shorter lead is the cathode (-). The PCB silkscreen usually indicates polarity. Solder each LED carefully.
- Solder Connectors and Potentiometer: Solder the USB power connector, audio input jack, and the potentiometer. Ensure these are flush with the PCB.
- Insert ICs: Once all other components are soldered and the PCB has cooled, carefully insert the ICs into their respective sockets. Ensure the notch on the IC aligns with the notch on the socket and PCB.
- Visual Inspection: After all components are soldered, perform a thorough visual inspection of the PCB. Check for cold solder joints, solder bridges (short circuits between pads), and incorrectly oriented components.
- Casing Assembly: Assemble the acrylic casing using the provided screws and standoffs. Ensure the PCB fits securely within the casing and all ports are accessible.

Image: The fully assembled FICEMETOI DIY Sound Control LED Music Electronic Kit, showcasing the LED array and input ports.
5. Setup
Once assembly is complete, follow these steps to set up your kit for operation.
- Power Connection: Connect a standard USB power cable (not included) to the USB input port on the kit. Plug the other end into a 5V USB power adapter or a computer USB port.
- Audio Input: Connect an audio source (e.g., smartphone, MP3 player, computer) to the 3.5mm audio input jack on the kit using an audio cable (not included).
- Power On: The device should power on automatically once connected to a power source. The LEDs may light up or show a default pattern.
6. Operating Instructions
Your Sound Control LED Music Electronic Kit is designed to visually represent audio frequencies.
- Audio Playback: Start playing music or any audio from your connected source.
- LED Response: The LEDs on the display will react to the incoming audio, typically showing patterns that correspond to different frequency bands or overall sound intensity.
- Sensitivity Adjustment: Use the potentiometer knob (if present) to adjust the sensitivity of the LED display to the audio input. Turning the knob clockwise usually increases sensitivity, making the LEDs react to quieter sounds. Adjust until the desired visual effect is achieved without overdriving the display.
- Microphone Mode (if applicable): If your kit includes a microphone, it may automatically switch to sound detection via the microphone when no audio cable is plugged into the 3.5mm jack. The LEDs will then react to ambient sounds.
7. Maintenance
Proper care will ensure the longevity and optimal performance of your kit.
- Cleaning: Use a soft, dry cloth to clean the acrylic casing. For the PCB, use a soft brush or compressed air to remove dust. Avoid using liquid cleaners directly on electronic components.
- Storage: Store the kit in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the assembled kit with care to avoid damaging the soldered connections or components.
8. Troubleshooting
If you encounter issues with your kit, refer to the following troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| No LEDs light up | No power, incorrect power connection, faulty USB cable, short circuit. | Check USB power connection. Ensure the power adapter is working. Inspect PCB for solder bridges or incorrect component placement. |
| Some LEDs not lighting | Faulty LED, incorrect LED polarity, cold solder joint, broken trace. | Verify LED polarity. Re-solder LED connections. Test individual LEDs if possible. |
| LEDs not reacting to sound | No audio input, low audio volume, incorrect audio connection, faulty microphone/audio input circuit. | Ensure audio source is playing and volume is up. Check audio cable connection. Adjust sensitivity potentiometer. Inspect microphone/audio input components. |
| Erratic LED behavior | Loose connections, interference, faulty IC. | Inspect all solder joints. Ensure ICs are seated correctly in their sockets. Try in a different environment to rule out interference. |
If these steps do not resolve the issue, please contact customer support for further assistance.
9. Specifications
- Product Type: DIY Sound Control LED Music Electronic Kit
- Function: Audio Frequency Display, Soldering Practice
- Power Input: 5V DC via USB
- Audio Input: 3.5mm Audio Jack or Integrated Microphone
- Display: Multi-color LED Array
- Adjustments: Sensitivity Potentiometer
- Assembly Required: Yes (Soldering)
10. Warranty and Support
For warranty information and customer support, please refer to the seller or retailer from whom you purchased this product. Keep your proof of purchase for any warranty claims.
If you have questions regarding assembly or operation that are not covered in this manual, please reach out to the manufacturer's or seller's support channels.