DTMF DECODER AND PIC16F877A
DTMF DECODER + PIC16 FOR OUTPUT RELAY, WIRE SENSING
THIS TAKES AUDIO INPUT FROM CELL PHONE AND UTILIZES DTMF DECODER IC, WHICH SIGNALS BACK THE OUTPUT INTO THE MICROCONTROLLER ALONG WITH AN INTERRUPT. SOMETIMES INTERRUPTS ARE NOISY AND INTRODUCES GLITCHES, SO 500mS DELAY HAS BEEN INTRODUCED. INTERNAL LOGIC OF MICROCONTROLLER IMPLEMENTS SIMPLE LOGIC LIKE SENSOR WIRE INPUT AND OUTPUT LEDS, RELAYS