A Bluetooth speaker kit from Aliexpress, with an animated LED board.
I had an oscillation problem and needed to troubleshoot.

Thanks for the more than 3000 subscriptions to my channel!

Kit link:
https://www.aliexpress.com/item/10050...
https://www.aliexpress.com/item/10050...

4017 datasheet:
https://www.ti.com/lit/ds/symlink/cd4...

Music from magic cow:
Horsell Common
Ojos Azules
  / magiccow