Telephone Line Powered LED Lamp

This small and bright LED lamp is telephone line powered, means it uses the power of our telephone line. There are about -40v to -50v at telephone line, LM317T is used to adjust them according to our demand.

Telephone Operated Remote Control v2 Using PIC16F876A

This is a newer version of previous device. This one can have up to 6 relays and 6 sensor-state inputs.
The task was to build a device that connects to the phone line and has a relay as an output switch. It should also sense if the connected «consumer» is turned-on or off and report to the administrator at the other end of the phone line. The administrator would then call-in the device, log in with the password, and check the state of «consumer», turn it on or off, change password or some other settings.


Download: Schematic, Program files And Documentation


Schematic:

Full Schematic

Telephone operated remote control

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.