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Circuit electronic Christmas tree DIY with LED, LED flash using astable oscillator with transistor, PCB in the shape of a Christmas tree to assemble, which will blink according to the oscillation frequency of the circuit.
About circuit transistor Astable Multivibrator
The transistor astable multivibrator is an electronic circuit that is capable of generating a continuous square wave signal without the need for any external input. It is composed of two transistors, resistors, capacitors, and a power supply. The circuit functions by continuously switching the states of the two transistors, causing them to alternatively turn on and off. This switching action charges and discharges the capacitors, resulting in the generation of a square wave output. The frequency of the output signal can be adjusted by changing the values of the resistors and capacitors in the circuit. The transistor astable multivibrator is commonly used in various applications such as timing circuits, frequency generators, and pulse width modulation. It is a versatile and widely used circuit in the field of electronics.
About the Christmas tree DIY with LED
The sound unit cannot use a buzzer. Otherwise, it will be very noisy. A speaker must be used, as shown in the picture:
Welding LEDs needs to be welded in order, with the silk screen facing up, the two boards are in the same order. As shown in the picture:
The LED on the top of the tower is optional. If you have extra RGB and can change the LED color according to your preferences.
The music chip, 16 seconds Jingle Bells Music Chip Christmas Music with LED Flashing Light SOP8 Package, It is a special function ci with recorded music and can be found on Alibaba or Taobao. The music chip can be changed by yourself.
Buy in Taobao – I recommend Taobao Superbuy agent.
Schematic Circuit electronic Christmas tree DIY with LED
Bom Circuit electronic Christmas tree DIY with LED
| Name | Designator | Footprint | Quantity |
| Resistors | |||
| 100 (101) | R2,R4,R6,R7,R8,R19 | 0805 | 6 |
| 4.7k (472) | R3,R5,R9 | 0805 | 3 |
| Capacitors | |||
| 47uF | C1,C2,C3, C5, C6, C7, C8 | Electrolytic SMD capacitor | 3 |
| 0.1uF | C4 | 0805 | 1 |
| Semiconductors | |||
| SOP8 | U1 | Special IC | 1 |
| Led 3 mm | B, D1,D2,D3,D4,D5,D6 | Led 3 mm red | 7 |
| Led 3 mm | D7,D8,D9,D10,D11,D12 | Led 3 mm yellow | 7 |
| Led 3 mm | R,D13,D14,D15,D16,D17,D18 | Led 3 mm green | 6 |
| 2N3904 | Q1,Q2,Q3 | SOT-23 – SMD NPN transistor | 3 |
| Miscellaneous | |||
| K2-1102DP-Z4SW-04 | RESET1 | Tactile Switches | 1 |
| HDR-F-2.54_1×2 | H1 | Pin header 2 pin | 1 |
| D21121000302-BEEP | BUZ1 | Small speaker | 1 |
| USB-TYPE-C6P | U2 | USB connector type C 6 pin | 1 |
Download files, links, and notes for Circuit electronic Christmas tree DIY with LED
Download PCB in Gerber, PDF, PNG and SVG
- Buy 16 seconds Jingle Bells Music Chip Christmas Music in Alibaba
- Buy 16 seconds Jingle Bells Music Chip Christmas Music in Taobao via Superbuy agent
- Buy electronic Christmas tree DIY
Source: https://oshwhub.com/linjia/dian-zi-sheng-dan-shu
