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 circuit was found in the Optoelctronics Sourcebook from Texas Instruments. The circuit has a...
We found this circuit with duty cycle adjustment in the May 1988 Radio Electronics magazine. The...
This 2.5 A power supply was found in a 90's QST magazine. The power transistor must be mounted on a...