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 operational amplifier used in this circuit is a low voltage type from Texas Instruments, being...
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
The presented circuit consists of a double phase shift oscillator capable of generating two sine...