3D Christmas Tree Production Kit Colorful LED Flowing Water Flash Tree Light Electronic DIY Welding Circuit Training Parts

Small Christmas Tree DIY Kit Introduction:

The small Christmas tree kit is composed of three circuit boards and components. You need to solder and assemble it yourself, so that 36 LEDs flash alternately, showing the outline of the Christmas tree in the space (the viewing effect is better in the night environment).

parameter:

Working voltage: DC4.5-5V

Power supply mode: 3 AA batteries, mobile phone charger, computer, power bank.

Dimensions (including shell): length 72mm × width 72mm × height 140mm

Board Material: Double-sided 1.6mm RF-4 sheet.

Small Christmas tree lights welding precautions:

Colorful light version: It is composed of 32 identical white-haired transparent LED lights welded. After lighting, the color will change regularly. Some customers only light up when they test and see that it is red. It will be misunderstood. Look at the transformation of the lanterns in a few seconds, the welding position is not distinguished, the welding position is arbitrary, and the long leg is the positive electrode.

Three-color lamp version: It consists of three different colors of single-color lamps. The welding position should be distinguished. For details, please contact customer service to download the electronic data.

The schematic diagram is as follows:

Working principle: It can be seen from the schematic diagram that 18 LEDs are divided into 3 groups when connected to 3-5V power supply. A transistor is turned on first. Here, it is assumed that Q1 is turned on first, then the group of LED1 lights up. Since Q1 is turned on, its collector voltage drops, causing the left end of capacitor C2 to drop, close to 0V, because the voltage across the capacitor cannot be abruptly changed, so Q2 The base of Q2 is also connected to approximately 0V, and Q2 is turned off, so the group of LED2 connected to its collector is extinguished; at this time, the high voltage of Q2 increases the collector voltage of Q3 through capacitor C3, and Q3 will also be turned on quickly. The group of LED3 is lit, so for a period of time, the collectors of Q1 and Q3 are both low level, the two groups of LED1 and LED3 are on, and the group of LED2 is off, but as the power supply passes through the resistor R2 to C2 When charging, the base voltage of Q2 gradually increases. When it exceeds 0.7V, Q2 changes from the off state to the on state, the collector voltage drops, and the group of LED2 lights up. At the same time, the voltage of the collector of Q2 drops. Through C3, the base voltage of Q3 also decreases, Q3 changes from on to off, its collector voltage increases, and the group of LED3 goes out. Next, the circuit cycles according to the process described above, and three groups of 18 LEDs are It will be lit in turn, and two groups of LEDs will be lit at the same time. These LEDs are arranged in a heart-shaped pattern, and the LEDs will flash and emit light in a continuous cycle to achieve the effect of flow display.

The Christmas tree music version kit：

Introduction:
The Christmas tree music version kit is composed of three circuit boards and components.You need to weld and assemble it by yourself. 53 5mm LEDs flash with the rhythm of the music, showing the three-dimensional outline of the Christmas tree in the space (the viewing effect is better at night) ).

Features:
1. With MP3 music
2.Readable TF memory card
3.readable U disk
4. 2W power amplifier + 3W speakers on the bottom plate
5.Can output music outside
6.Volume can be adjusted

Points to note during welding:
The colorful light is composed of 53 identical white-haired transparent LED lights. After the light is turned on, the colorful color will change regularly. Individual customers only light it up when they see it. It will be misunderstood when they see red. The test should be lit for several seconds Look at the change of colored lights. There is no difference in welding position. Weld at any position. The long foot is positive.

Parameter:
Working voltage: DC4.5-5V
Power supply: 3 AA batteries, mobile phone charger, computer, power bank.
Circuit board material: double-sided 1.6mm RF-4 board.

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