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INTERFACE_CIRCUITS_FOR_THE_REMOTE_CONTROL_TRANSMITTER

2016-04-04 15:54  
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INTERFACE_CIRCUITS_FOR_THE_REMOTE_CONTROL_TRANSMITTER
Shown here are several possible interface circuits that can be used with the remote-control transmitter. The one in A illustrates a typical FM stereo MUX decoder with a load connected directly to the open-collector output of a TA7343 PLL. The circuit in B illustrates an optoisolator-coupler out-put driving a 12-V relay coil via a general-purpose transistor. C shows the gate of an N-channel power MOSFET connected to the output of a 4N33. The final circuit, D, is a toggle flip-flop that allows push-on/push-off control.