Remote control using telephone by KT3170


Remote control using telephone by KT3170

Here is a teleremote circuit which enables switching on and off of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote controls. The circuit described here can be used to switch up to nine appliances (corresponding to the digits 1 through 9 of the telephone key-pad). The DTMF signals on telephone instrument are used as control signals.

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remotecontrols/circuit-diagrams/remotecontrolsckt2.html
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