This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational equivalents can be used. The FET is a general-purpose type.
In the figure we have a third fast adder that we found in an 80's Electronic Engineering. The circuit can...
This circuit for TTL probes uses a 7400 as the main element. The circuit memorizes the signal...
This circuit triggers an oscillator when any of the sensors is opened. The circuit can be powered by...