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Homemade wireless remote control intermediate frequency swit

2016-11-07 12:10  
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Homemade wireless remote control intermediate frequency switcher circuit
Operating principle: the principle diagram of the wireless medium frequency switcher is as shown in figure 1. A1 is the wireless remote control dedicated transmitter module, when you press the switch S to connect the power, the built-in transmitting antenna sends the 280MHz ~ 300MHz ultra-high frequency modulation electromagnetic wave to the surrounding space, it is received by the built-in receiving antenna of the dedicated receiver module A2 in the effective distance, then it is modulated, amplified, detected, transformed by the A2 module, the output port outputs the high level pulse to conduct VT5 and control the operating of IC.