This circuit is part of an integrated circuit tester published in an article in Radio Electronics magazine in September 1985. The circuit is powered by a 9 to 12 V source.
This circuit is given in two versions, having been found in a publication from the 90s. The second...
This circuit was found in an ancient American documentation. Used integrated circuits are uncommon...
This Texas Instruments circuit uses a phototransistor to fire a TTL trigger port. Other...