DTMF 4 CH key switch
DTMF4CH
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This kit lends itself to countless applications where remote control (ON/OFF bistable or monostable) of any electric-electronic circuit is required. It has four independent channels that can be activated separately. It can be connected to the BF output of any UHF, VHF, HF receiver or transceiver or to any low frequency line. Its operation is very simple: by sending a series of 6 DTMF tones in the right sequence and in a given time interval it is able to close or open the contacts of a relay which in turn can drive any device. As confirmation of the command received, the circuit will generate a note lasting a few seconds, available on pin 1 of the SV2 connector,
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