石榴姐

Radio button three-button ch552 hot-swappable improved version

 
Overview
The first position is not enough for two Kaihua axis seats,
and a positioning plate is added with an LED. It can be powered through a copper pillar.
I directly replace it with copper wire.
It has been verified
that I use keil5 to write
the knob volume adjustment and pause
key123 to open the player's previous song and next song. song
参考设计图片
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