Found in Radio Electronics from the 90s, this thermometer uses an integrated circuit that is unusual today. The sensor is a thermistor or NTC.
The circuit shown is an AND gate with three inputs using a comparator of the four existing in an...
This circuit, which can only be used with incandescent lamps, is adapted to the common wall...
This passive circuit was found in the March 1995 issue of Elexctonics Now magazine. The circuit is for...