DIY 51 MCU 4 Heart-shaped LED Flash Electronic Kit With Music and Case

Kit parameters:

Supply voltage: DC 4.5V-5.5V;
PCB board size: 103.6MM*87MM
Acrylic shell size: 117MM*100mm*21MM
it have 30 kinds of pattern LED rotation effect
Note 1: Please solder it refer to the PCB mark. Most of the triodes are 8550, one of which is 8050. Please pick this out when soldering. (There are 2 devices on the PCB board, one writes 8050 and one writes MUSIC. This is because the current music IC has 2 kinds of packages, one is COB, and the other is T0-92, so it is compatible with 2 kinds of music ICs. If the music IC is COB package, the transistor 8050 is soldered on the music IC. if the music IC is packaged in T0-92, the transistor 8050 is soldered on the PCB.)
Note 2: Music IC song is For Alice.

Package included:

1 x PCB board
35 x 5MM red hair red LED
26 x 5MM green hair green LED
18 x 5MM yellow hair yellow LED
10 x 5MM blue hair blue LED
1 x STC89C52 QFP44 Package
1 x 4P array
2 x 22P ceramic capacitor
1 x 12M crystal oscillator
1 x DC005 seat
1 x USB to DC005 line
1 x 8*8 self-locking switch
50 x 510 ohm resistance
10 x 4.7K resistor
8 x 8550 Transistor
1 x 8050 triode
1 x 10UF capacitor
1 x 1N4007 diode
1 x 104 ceramic capacitor
1 x Music IC
1 x Passive buzzer
1 x case