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.
Using the LM3909 this circuit was found in the January 1992 issue of Radio Electronics magazine....
Found in the April 1995 issue of Electronics Now, this circuit operates at a lower frequency than...
This circuit is from a Radio Electronics magazine from May 1989. The source must be symmetrical, and other...