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 powerful amplifier with output in complementary symmetry is from an old documentation....
This transistorized oscillator, a modification of the Colpitts oscillator, was found in the...
Found in Popular Electronics from the 90s, this generator uses integrated circuits from that time....