This TTL counter was found in the March 1991 issue of Radio Electronics magazine. The circuit is part of a larger project and must be powered by a 5V voltage.
This filter, which rejects frequencies around 1 kHz, was found in the August 1993 Electronics Now...
Found in a 90s Popular Electronics, this circuit is based on a common CMOS component. The circuit...
This circuit appears elsewhere in this section. This version is from General Electric from the...