Light trigger switch circuit
Source: InternetPublisher:偷熊计划 Keywords: switching circuit trigger operational amplifier phototransistor Updated: 2021/09/06
The circuit shown uses a Darlington phototransistor and an operational amplifier , so very weak light can cause the circuit to flip. When the positions of
Ri and the phototransistor are reversed, or the inverting and non-inverting input terminals of the operational amplifier are reversed, the circuit can be modified
into a dark trigger switch.
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