The time delay circuit diagram composed of transistor

  
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It can set delay time according to the voltage Us and resistor R. In the circuit, S1 is the the discharge switch of capacitor C. When the switch S1 is closed, the stored charge on C will be released through S1 to ensure the accuracy of the delay time the next time. VD1 and VD2 are used to eliminate the impa..
The time delay circuit diagram composed of transistor - schematic




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