Printed circuit board drilling machine on the Atmel AT89C2051 microcontroller L297 L298 motor drivers.. software does not open hex ​​code provided free computer control program, but other parts of the circuit (motor drives, serial communications, etc..) Print circuit drawing... Electronics Projects, CNC Drilling Machine Control Dirve Board Atmel AT89C2051 L297 L298 "avr project, microcontroller projects, " Date 2019/08/02