We found this light relay circuit in year 2000 documentation. The relay is 6 V and the circuit includes a power supply. It can be used to control various devices from the incident light in the LDR.
With this circuit it is possible to excite direct current relays from an alternating signal,...
This circuit is from an old documentation. The integrated circuit can be replaced by a modern...
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...