The presented circuit was found in the National Semiconductor FET Databook. The setting applies to other operational amplifiers and other FETs. The power supply must be symmetrical.
This circuit was found in a Popular Electronics of June 1978. The circuit is interleaved between the...
To protect your home, vehicles or even objects, what we present is a sensitive alarm circuit that...
This circuit was obtained from an English magazine from 1979, but can be easily assembled...