Millivolts meter circuit PIC16F88 based on 2 × 16 LCD display there mV, DBV, dBm signal levels can show audio signal input section ad623 and ad8307 used 12-15volt DC adapter operated on supply input LM317 regulated with built pic... Electronics Projects, Audio Signal Measurement Digital Millivolts Meter Circuit PIC16F88 "microchip projects, microcontroller projects, pic16f88 projects, " Date 2019/08/02