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1. Description
1>. It is DIY kit. Customers need weld it by themselves.
2>. It displays with green and red LED.
3>. 18pcs LED automatic flashing alternately with music “Happy Birthday to you”.
2. Component listing.
Component | Number | Parameter | Quantity |
Electrolytic capacitor | C1,C2 | 100uf | 2 |
Resistance | R1,R4 | 10ohm | 2 |
Resistance | R2,R3 | 27Kohm | 2 |
9300 | IC | TO-92 | 1 |
S8050 | VT1,VT2,VT3 | TO-92 | 3 |
Buzzer | SPK | 1 | |
Red Green LED | L1-L18 | 18 | |
PCB | 1 |
3. Schematic