Infrared sensor high voltage dangerous voice warning circuit diagram

  
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Pyroelectric infrared sensor head is same with the figure. When it detects the human body infrared signal in guarding zone, the sensor head will output a positive jump pulse signal, this signal is added to input terminal P point. IC1 adopts 555 time base circuit, the monostable trigger circuit is composed of 555 and R3, C2. P`s jump signal is phased and amp..
Infrared sensor high voltage dangerous voice warning circuit diagram - schematic




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