This simple three-LED sensor uses an NTC at the input. The circuit is based on an uncommon integrated component today. We found it in documentation from the 80s.
This circuit was obtained in an old American manual. The circuit is valid for any operational. The...
This circuit converts a positive CMOS supply voltage to a negative one. We found it in a 90s...
The TL431 integrated circuit consists of a programmable shunt regulator with an internal...