This 4 1/2 digit digital voltmeter circuit was published in the April 1993 Electronics Now magazine. The circuit uses the integrated component of the time and has 5 voltage ranges.
The project is from a 1992 publication, but totally current by the components it uses. The LEDs...
Other CMOS gates can be used in this sensor, which we found in the July 1995 Electronic Now...
In this circuit we show how to modulate the pulses produced by a 555 in frequency. The circuit can be...