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Radio control

2015-03-01 21:33  
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Radio control (often abbreviated to R/C or simply RC) is the use of radio signals to remotely control a device.  The term is used frequently to refer to the control of model vehicles from a hand-held radio transmitter.A simple and effective receiver for actuating garage doors, alarms, warning systems, etc. The SCR, which has a very low trigger current 30 ?μ is typicala€”.It requires an input power of only 30 juW to activate the relay. A high Q tuned antenna circuit assures rejection of spurious signals. A whip or wire antenna is adequate up to 100 feet from a low power transistor transmitter.A momentary-off switch resets the circuit.
 

Radio control