In the figure we have a simple way to have a peak bargraph indicator. The amplifier is of the audio type, but operational ones can be used. The circuit is from Radio Electronics from March 1980.
This circuit was found in an old publication and can be adapted for use with modern...
The circuit presented generates pulses at regular intervals with the duration controlled by a...
The LS150 is an uncommon high-performance operational amplifier today. The circuit is from old...