Reverse polarity protection 2 (CB22140E)

This circuit has an improvement over the previous one as it also has an LED indicator for correct polarity.

2A Regulator (CB19505E)
This circuit, found in a publication from the 1980s, can have its output voltage determined by the...
Current and voltage source (CB8800E)
Found in an Electronic Design from the 90s, this circuit uses components from that time and can...
Unijunction Bistable (CB16912E)
This circuit, from ancient French documentation, produces a rectangular pulse from input pulses...