We found this circuit in an Electronics Now from the 1990s. The circuit crashes when light strikes the sensor. Instead of the alarm a relay can be used to drive higher power devices.
To protect your home, vehicles or even objects, what we present is a sensitive alarm circuit that...
With this circuit, found in an English publication in 1983, it is possible to control an...
The FET admits equivalents like the BF245 in this circuit that we find in a documentation from the...