If you are studying embed electronics or hobby at this, then this set of "STM32 Pet Doggy" is a challenge and fun.
You may see the finished one something like this:
https://www.youtube.com/watch?v=aZ13q9g28yg
I don't have time to finish this anymore, so I am selling it to who wants. $30, no bargain please.
The kit includes EVERTHING you need EXCEPT tools.
Refer the picture for details please.