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 a 1966 General Electric documentation. The circuit makes use of PUTs...
This circuit uses na Unijunction Transistor (UJT) to produce a modulation tone for several...
This circuit causes one LED to light up if the voltage falls below the value set in R3 and the...