ESC for brushless motors.
Driven by impulse 1-2ms. Powered by li-ion 2S batteries. Gives the time of passage of 2 magnets in UART. If you have 12/14 then 60/({you time} * 7) prm. You can set the direction of rotation.
I did not debug work from 3S. May be necessary to change the voltage divider.
This board is one sided for DIY PCB home print !!!