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 memory flip-flop must be powered by 5V voltage. The circuit stores 1 bit. ...
Originally designed for use in an FM receiver, this 1990 circuit can be adapted for other types of...
This circuit, found in ancient US documentation, allows you to switch the antenna from the...