Found in a documentation from the 90's, this circuit uses only one integrated circuit. The resistors in series with the LEDs depend on the power that can be between 5 and 12 V.
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...