This circuit for a digital module was found in the September 1989 Radio Electronics magazine. The source must be symmetrical to the operational amplifier.
This is the project was found in a 1982 publication. As shown in the figure, these are two...
We found this circuit in a 1977 Radio Shack manual. The light bands are given by the operating gain...
This counter from 0 to 9999 was found in English documentation. The power source must be 5V with...