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 was found in a Radio Electronics from May 1965. The transistor is a power transistor and in...
Found in an American paper from the 90's, this circuit can be adjusted to pass frequencies above 30 to 300...
This circuit is from a 1990s publication by William Sheets. The circuit consists of a stage whose...