This circuit with different colored indicator LEDs has an expanded scale. We found it in the March 1992 Radio Electronics magazine. For an adjustable range of 0 to 10.5 V.
Activating a relay from pulses (from a monostable, for example) can be useful in many types of...
This project uses an unusual integrated circuit that consists of a programmed timer. The circuit was...
I found this circuit in a Popular Electronics from 1992. The circuit shows how we can receive...