This circuit was found in a 1975 documentation. Current general-purpose transistors can be used, and the power is supplied with relatively high voltage. The gain is 30 dB.
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...