The purpose of this circuit is to detect the movement of a person by the changes in light that their presence causes. The circuit is sensitive and can use as sensor a LDR and a phototransistor. The circuit is from recent American documentation.
The purpose of this circuit is to detect the movement of a person by the changes in light that their presence causes. The circuit is sensitive and can use as sensor a LDR and a phototransistor. The circuit is from recent American documentation.
