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Telephone operated remote control using PIC16F84A microcontroller
Telephone operated remote control using PIC16F84A microcontroller
Circuit Diagram
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.
Instructions for the telephone operated remote switch:
A) While constructing the main circuit, make sure you use 18pin sockets (base) for the PIC16F84A. Do not solder the IC directly to the board since you may have to remove it for programming. Before you use the PIC on the main circuit, you have to first program it.
B) To program the PIC16F84A microcontroller:
There are lots of programmers on the Internet available to program PIC microncontrollers. Given below are links to some free PIC programmer hardware/software:
- Parts List
- C source code complied using HT-Soft PIC C compiler
- Compiler Hex code file to be directly programmed into the PIC
Instructions for the telephone operated remote switch:
A) While constructing the main circuit, make sure you use 18pin sockets (base) for the PIC16F84A. Do not solder the IC directly to the board since you may have to remove it for programming. Before you use the PIC on the main circuit, you have to first program it.
B) To program the PIC16F84A microcontroller:
There are lots of programmers on the Internet available to program PIC microncontrollers. Given below are links to some free PIC programmer hardware/software:
- http://www.covingtoninnovations.com/noppp/
- http://www.picallw.com/
- http://www.lpilsley.uklinux.net/software.htm
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