Found in the documentation on PCs, this circuit excites LEDs whose current is determined by R3.
The purpose of this circuit is to add millivolt scales to a common multimeter. Used transistors are...
We find this circuit in the 80's own component manual. The power supply should be from 4 to 30 V...
This interesting circuit was obtained from a 90's EDN. What it does is generate negative voltages...
