Darlington phototransistor type light-triggered circuit diagram of a switching application

  
Darlington phototransistor type light-triggered switching circuit application As a result of the sub-type Darlington phototransistor and the op amp, so very faint light can fli
Darlington phototransistor type light-triggered circuit diagram of a switching application - schematic

p the circuit. When the position of R1 and photodiodes swap, or op amp inverting and non-inverting input reversed position, you can put this circuit modified to trigger the opening dark.




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