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.
This SCS counter circuit was found in a 1964 General Electric documentation. The circuit has a...
This simple 1-transistor reflex receiver was published in Radio Electronics magazine in September 1959....
Operational amplifiers used in this 80's circuit is not very common today, but the setting can be...