Forum Mulder_den: https://www.rcgroups.com/forums/showthread.php?2372161-RC-Sound-module-for-20 To the engine start put the pin "Diesel" on gnd. To stop open the pin ...
It's based on the ATmega 328 version: https://github.com/TheDIYGuy999/Rc_Engine_Sound and on bitlunis Halloween example: https://github.com/bitluni/MotionPumpkin ...