This circuit was found in a Popular Electronics from the 90s. The components admit equivalents and the phototransistor can be of any type.
This circuit was obtained in an English publication of 1975. It is a regulator circuit for...
In this circuit the relay triggers on when light falls onto the sensor, a common LDR. Power supply...
January 2017 - Mouser Electronics already has the new Ultra Low Drop controllers from Toshiba...