This circuit was obtained from an 80's EDN. The components used are still common. The circuit can be used as a shield and the frequency is approximately 775 Hz.
Using one unijunction transistor and two bipolar transistors, this circuit generates a signal from...
This circuit was found in an American 80s circuit manual. The components used are unusual. The...
We found this circuit in 1969 American documentation. FETs admit equivalents, as do transistors. The...