Found in the CQ radio amateur magazine, this circuit generates a standard 100 kHz signal. The circuit is from 1965 and can be made with modern equivalent transistors.
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...
This interesting circuit, found in a 1997 documentation, allows you to view the characteristic curves of...
This circuit generates a tone whose frequency is set at VR1. The signal is reproduced in a...