This 3 and-a-half digit circuit was found in a Teledyne documentation from the 90s. The circuit uses a thermocouple as a sensor. The integrated circuit used is uncommon today.
This circuit is from a Hands-On Electronics from 1987, but it can still be easily assembled, as...
This circuit can control a heating element with a current of up to 5 A. The integrated circuit must...
The transformer of this oscillating circuit is obtained from old transistor radios and E1 is a...