Found in American documentation from the 90s, this circuit has the signal frequency determined by capacitors from C4, C3, C2 and C5 selected by digital switches.
We found this configuration in a Radio Electronics from 1989. The circuit can be designed with...
This interesting configuration was found in a 1965s Electronic Design. It makes use of components of...
This circuit is from old American documentation intended to trigger the flash of a camera flash with...