Atmel AT89C51-series microcontrollers for RB2 and AT89C5131A summer programs that try to experiment with a variety of cards for AT89C51-RB-2, which carries the same features as the circuit usb-aided circuit instead of just usb rs232 connection. All circuits prepared... Electronics Projects, Development, Experiment Circuits Atmel AT89C51RB2 AT89C5131A "development board projects, " Date 2019/08/02