DIY LED Multicoloured Christmas Tree Kit DC5V LED Flashing Light Circuit Kit Electronic Fun Soldering Practice Kit

Product Features:

1. Crafted from premium materials, ensuring quality assurance

2. This kit is ideal for training welding skills while also being perfect for DIY enthusiasts, significantly enhancing practical abilities

3. Features a flashing effect created by multicoloured LEDs, making it an excellent choice for gifts or decorative purposes

4. Product shipped as loose components requiring customer assembly; includes USB power cable.

5. Lightweight design enables versatile applications for convenient use anytime, anywhere.

Product Specifications:

Name: Multicoloured Christmas Tree Electronics Construction Kit

Operating Voltage: DC5V (compatible with mobile chargers, dry batteries, etc.)

Specifications: Kit with housing components or loose components without housing (requires self-assembly)

Operating Principle:

When connected to a 3-5V power source, the 37 LEDs are divided into 4 groups. Upon powering up, all 4 transistors attempt to conduct simultaneously. However, due to component variations, only one transistor conducts first. Assuming Q1 conducts first, the LED1 group illuminates. As Q1 conducts, its collector voltage drops, lowering the voltage across capacitor C2's left terminal to near 0V. Since capacitor voltage cannot change abruptly, Q2's base is also pulled to approximately 0V, causing Q2 to cut off. Consequently, the LED2 group connected to its collector extinguishes. At this point, the high voltage from Q2 raises the collector voltage of Q3 via capacitor C3, causing Q3 to conduct rapidly. The LED3 group illuminates. Consequently, for a brief period, both Q1 and Q3 have low-level collectors, illuminating the LED1 and LED3 groups. while the LED2 group extinguishes. However, as the power supply charges capacitor C2 through resistor R2, the base voltage of Q2 gradually increases. When it exceeds 0.7V, Q2 transitions from cutoff to conduction state, causing its collector voltage to drop and illuminating the LED2 group. Simultaneously, the voltage drop across Q2's collector through C3 reduces the base voltage of Q3, causing Q3 to transition from conduction to cutoff. Its collector voltage then rises, causing the LED3 group to extinguish. Subsequently, the circuit cycles through the aforementioned process, causing the three groups of 18 LEDs to illuminate sequentially. At any given moment, two groups are lit simultaneously. These LEDs are arranged in a criss-cross pattern forming a heart shape, continuously cycling through flashing illumination to achieve a flowing display effect.

Delivery List:

Christmas Tree DIY Components x1