We found this circuit in an old documentation for radio amateurs. The circuit uses an analog indicator. The characteristics of the coils are given next to the diagram.
Found in a 1993 Electronics Experimenter Handbook, this circuit uses a multimeter to measure...
This circuit makes use of components from the 80s. However, the configuration used can be used as a...
This circuit drives two-color LEDs at a speed that is set in the 100k pot. The circuit can be...