Sensitive light control switch circuit

Posted on Mar 28, 2007

As a result of the circuit shown in Darlington type phototransistor as the sensing element, the more sensitive to low light, suitable for the reflected light detection signal.

Sensitive light control switch circuit
Click here to download the full size of the above Circuit.

Circuit, when Darling Introvert phototransistor exposed to light, its resistance decreases, so that the potential of pin fall, when reduced to U [ c/3. feet high output, then the relay releases.

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