This circuit decodes a 1800 Hz tone used in communications. The circuit is from an American documentation for radio amateurs of the 80's. Equivalent component can be used.
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
The basic idea of this circuit is to indicate the tolerance of a capacitor by reference to a...
This simple multitester tests continuity, semiconductors, leaks, and other common component...