Telephone Operated Remote Control Using PIC16F84A
This design controls up to 8 devices using a PIC microcontroller (PIC16F84A) connected to the phone line. The unique feature here is that unlike other telephone line based remote control, this device does not need the call to be answered at the remote end so the call will not be charged. This device depends on number of rings given on the telephone line to activate/deactivate devices. Set the DIP SWITCH as follows: Switch RA4 Switch RA3 No. of initial rings to Switch ON(activate half of the board) OFF OFF 2 ON OFF 4 OFF ON 3 ON ON 5 T...