This circuit appears at various points on this site and in this section and can be designed with almost any operational amplifier. This version is from an American documentation from 1975.
Based on the well-known LM3914, this circuit has a transistorized and inverters stage, triggering...
We found this circuit in the April 1996 issue of Electronics Now magazine. The circuit uses a...
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...