The integrated circuits used in this thermometer are not very common today. The indicator is a microammeter for a scale from 0 to 100o C. The supply must be made with a voltage of 1 to 12 V.
This circuit was found in Radio Electronics from the 90s. The components used are common, and the...
This circuit was found in an American publication called Ham Radio. The circuit uses still current...
This circuit was obtained from a 1997 publication. It is an alarm that has a lock and a bistable...