PIC16F628 microcontroller and DTMF CM8870 integrated circuits based on the 1, 2, 4 relay has versions with PCB printed circuit drawings ares proteus software prepared by the Picbasic. Source code, the PCB according to the drawings, as well as... Electronics Projects, CM8870 Remote device control via telephone DTMF pic16f628 "microchip projects, microcontroller projects, pic16f628 projects, picbasic pro examples, " Date 2019/08/04