8051 microcontroller is a useful post for programs designed to try the circuit. As a Test circuit has rs232 serial port the display, compress, ISP, IC2 (AT24C02), eeporom, led, pushbutton, IR receiver parts. In addition to the RS232 serial... Electronics Projects, 8051 Development Test Circuit 8051 Example Code "development board projects, " Date 2019/08/02