I/O control analog sampler plc system based on microchip pic16f877 circuit output serial rs232 pc connection is used the uln2003 in max232 IC with sag. pcb diagram 32-bit windows control program in other drawings, and is written in the... Electronics Projects, PIC16F877 Series I/O Circuit Analog Control System PLC Sampler "microchip projects, microcontroller projects, pic assembly example, pic16f877 projects, " Date 2019/08/02