[Piano bracelet DIY+682572A]

Last year, a classmate who likes to play the piano suddenly came up with the idea of ​​a piano bracelet that would light up as the music changed. The requirements were: the louder the piano was played, the brighter it would light up; the faster the hand speed, the faster it would flash. So I found it. I

After optimization, I finally made the piano bracelet, which can now be worn portablely on the hand to achieve the desired effect. It can also be charged through TYPE-C.

The circuit diagram is quite simple and suitable for beginners to draw. The 0402 chip resistors used in it can also allow students to get advanced welding practice. The total cost is about 20 yuan.

Because we cannot post an introduction of more than 50M here, we only uploaded a few pictures for a detailed introduction. You can check out the video posted by Station B before: https://www.bilibili.com/video/BV1bV411H712 The student party has limited ability and energy. Please also bear with me, bosses ^-^