This circuit is an alternative to the previous circuit. We found it in the same article in the Radio Electronics magazine of March 1992. The integrated circuits are the LM3914.
This circuit is from 1970 documentation. The SCRs are types of the era that can be replaced with 106...
We found this circuit in Radio Electronics magazine from January 1962. The circuit requires a good...
The different aspect of this source is the use of a 12 V lamp as a current regulator together with a...