The purpose of this heat detector is to find hot spots on a board or other locations. The sensor is an integrated circuit from the period. The circuit is from Radio Electronics from May 1985.
This circuit limits (clip) the intensity of a signal, according to the setting of P. The circuit is...
We found this circuit in an American brochure from the 90s. In it we have the way to implement a 4-input...
This tone generator for CW was found in a publication by Gernsback from 1960. The circuit makes use...