Found in old American documentation, this receiver receives modulated infrared signals and converts them into sound. The audio amplifier circuit can be replaced by a modern equivalent.
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...