Radio remote control circuit

  
The receiver circuit shown in FIG. Insert the plug XP radio headphone jack xs, when the radio receiver to the hair after the transmitter signal, the audio
Radio remote control circuit - schematic

signal output from xs by VD1, VD2, c2 rectifier filter, the resulting DC signal is applied by the VT1, VT2 constituting the composite tube base, turning it on, so the relay KD pull. KD pull, can use its normally open and normally closed contacts connected to any load circuit, realize the wireless remote control to turn on or off.




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