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.
The CA3020 integrated circuit was one of the first commercial types, sold in the 1960s. The...
This circuit generates a linear sawtooth signal with frequency that depends on the capacitor next...
This circuit has a maximum frequency of 10 kHz and a linearity better than 0.01%. The circuit is...