This circuit makes use of a constant current source to control the temperature of a direct current heating element. The integrated circuit must be mounted on a heat sink.
This window comparator circuit was found in a Popular Electronics from the 90s. The circuit has a...
Found in Radio Electronics from the 90s, this siren finds many variations on this site. The...
This circuit with automatic gain control was found in the July 1988 issue of Radio Electronics magazine....