This kit is a DIY kit. User needs to solder themselvers.
This Christmas tree kit is composed of three circuit boards(A board\B board\C board). The user assembles them by soldering, allowing 36 LEDS to flash alternately. This presents a three-dimensional outline of the Christmas tree in space(better viewing at night).
Input voltage: DC 4.5-5V
List of originals:
Note: The music version adds more components(1 buzzer, 1 transistor, 1 music transistor, 2P pins+1 jump cap)
Transistor and music IC are the same, pay attention to distinguish when soldering, in order to avoid soldering wrong.