This circuit can function as both a light alarm and a shadow alarm. The components are common. The circuit includes the power supply. Output transistors must be mounted on heatsinks.
The circuit shown in the figure is suggested by Intersil (www.intersil.com) and makes use of the...
This circuit was obtained from an English magazine from 1979, but can be easily assembled...
This differentiating circuit applies to any operational amplifier. It operates with the negative...