Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR admits equivalents and the lamp must be incandescent.
We found this circuit in the 1994 Linear Applications Handbook by National Semiconductor. The...
This circuit is from an English publication from 1981. It can still be assembled with transistors BC548...
This bargraph circuit has already been explored in other versions in articles on this site. This is...