1. Introduction
This manual provides detailed instructions for assembling and operating your PEMENOL 3D RGB LED Rotating Christmas Tree Soldering Kit. This kit is designed as an educational electronic project, suitable for beginners and students interested in soldering and electronics. Upon completion, it functions as a decorative item featuring colorful LED lights, rotation, and musical output.

Image 1.1: Fully assembled 3D RGB LED Rotating Christmas Tree.
2. Safety Information
Please read and understand all safety precautions before beginning assembly. This kit involves soldering, which requires heat and can produce fumes. Adult supervision is recommended for younger users.
- Ventilation: Work in a well-ventilated area to avoid inhaling solder fumes.
- Eye Protection: Always wear safety glasses to protect your eyes from solder splashes or flying component leads.
- Hot Surfaces: The soldering iron tip and recently soldered components will be hot. Avoid touching them directly.
- Electrical Safety: Ensure the power supply is disconnected before making any adjustments or repairs. Use only the specified power input (DC 4-5.5V).
- Component Handling: Some electronic components can be sensitive to static electricity. Handle them carefully.
3. Package Contents
Verify that all components listed below are present in your kit before starting assembly. Refer to the component layout image for identification.

Image 3.1: Overview of the kit components.
- Printed Circuit Boards (PCBs) for tree structure and base
- Various Resistors
- Capacitors (Electrolytic and Ceramic)
- Transistors
- Diodes
- LEDs (3mm colorful, 5mm blue)
- Motor
- Buzzer/Speaker
- USB Power Cable
- Hardware (screws, nuts, copper pillars)
- DC Power Jack
4. Setup and Assembly Instructions
Follow these steps carefully to assemble your Christmas tree kit. Pay close attention to component polarity and placement as indicated on the PCB silkscreen.
4.1 Soldering Surface Mount Device (SMD) LEDs (if applicable)
Some versions of the kit may include SMD LEDs on the rotating base. If so, follow these steps for soldering:
Video 4.1: Demonstration of SMD LED soldering technique. This video illustrates how to melt solder onto a pad, place the LED with tweezers, and then solder the remaining pins.
4.2 Assembling the Tree Structure
- Prepare PCBs: Identify the main tree-shaped PCBs and the circular base PCBs.
- Solder Components to Tree PCBs: Solder the 3mm colorful LEDs, resistors, and capacitors onto the tree-shaped PCBs according to the silkscreen markings. Ensure correct polarity for LEDs and electrolytic capacitors.
- Assemble Tree Layers: Carefully interlock the tree-shaped PCBs to form the 3D structure.
- Solder Components to Base PCBs: Solder the 5mm blue LEDs, transistors, and other components onto the circular base PCBs. Pay attention to polarity.
- Install Motor and Buzzer: Mount the motor and buzzer onto the designated spots on the base PCB. The buzzer is responsible for the musical output.
- Connect Tree to Base: Secure the assembled tree structure to the rotating mechanism on the base.
- Final Connections: Connect the power jack and any remaining wires as indicated in the detailed instructions (if provided separately).

Image 4.2: Example of soldering components onto a circuit board.
5. Operating Instructions
Once assembled, your PEMENOL 3D RGB LED Rotating Christmas Tree is ready for operation.
5.1 Powering On
- Connect the provided USB power cable to the DC power jack on the base of the Christmas tree.
- Plug the USB end of the cable into a compatible power source (e.g., USB charger, power bank, computer USB port). The working voltage is DC 4-5.5V.
- The tree should automatically light up, rotate, and play music upon receiving power.

Image 5.1: The DC power jack for connecting the USB power cable.
5.2 Features
- Colorful LED Lights: The tree features 37pcs 3mm colorful LEDs that create a running water light effect. The base has 18pcs 5mm white-haired blue LED lights for a breathing light effect.
- Rotation: The base is equipped with a motor that allows the tree to rotate automatically.
- Musical Output: A built-in speaker plays music when the device is powered on.
Video 5.2: Demonstration of the 3D RGB Rotating Christmas Tree in operation, showcasing its lights and rotation.

Image 5.3: Key features including the swivel base, buzzer, and copper column base.
6. Maintenance
To ensure the longevity and proper functioning of your Christmas tree kit, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to gently wipe dust from the PCBs and LEDs. Avoid using liquids or abrasive cleaners.
- Storage: When not in use, store the assembled tree in a dry, cool place away from direct sunlight and extreme temperatures.
- Handling: Handle the tree carefully to avoid bending or breaking component leads or the PCB itself.
- Power Disconnection: Always disconnect the power cable when cleaning or moving the tree.
7. Troubleshooting
If you encounter any issues with your kit, refer to the following troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn on. | No power, incorrect LED polarity, cold solder joint, faulty component. | Check power connection and source. Verify LED polarity during assembly. Inspect solder joints for continuity. Test individual components if possible. |
| Tree does not rotate. | Motor not connected, faulty motor, power issue to motor. | Ensure motor is correctly wired. Check for any obstructions preventing rotation. Verify power supply is adequate. |
| Music is too loud or distorted. | Buzzer issue, no volume control. | This kit does not feature volume control. If the music is undesirable, the buzzer can be carefully desoldered and removed. |
| Some LEDs are not lighting up. | Incorrect polarity, cold solder joint, faulty LED. | Check the polarity of the specific LED. Re-solder the connections. Replace the LED if it is confirmed faulty. |
8. Specifications
- Brand: PEMENOL
- Model: 3D RGB LED Rotating Christmas Tree Soldering Kit
- Material: Copper, Fiberglass, Plastic
- Item Weight: 0.15 Kilograms (approximately 5.3 ounces)
- Power Input: DC 4-5.5V (via USB cable)
- Light Type: 3mm Colorful LEDs (tree), 5mm Blue LEDs (base)
- Features: Rotating base, musical output, breathing light effect (base), running water light effect (tree).
- Dimensions: Approximately 7.48 inches (height) x 2.44 inches (width) x 2.44 inches (depth).

Image 8.1: Diagram illustrating the product dimensions.
9. Warranty and Support
For any questions, technical assistance, or support regarding your PEMENOL 3D RGB LED Rotating Christmas Tree Soldering Kit, please contact PEMENOL customer service through the retailer's platform where the product was purchased. Please refer to the product listing for specific warranty details and contact information.





