This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational equivalents can be used. The FET is a general-purpose type.
We found this conventional circuit with the 555 in a documentation from the 70s. Several similar or...
This circuit is one of many that we have in our section. It was taken from the Electronics...
This circuit controls a relay from the light incident on a sensor. The sensor is an LDR and the...