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.
National Semiconductor suggests the figure circuit for stabilizing the peak value of an...
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
The circuit presented was obtained from a 1976 Italian Radio Elettronica but can be easily...