LOCK h MR HPQ.S
Easy Berardi Building
You can count on this simple frequency counter from Arizona,
foseph Berardi 14213 N, 38th St Phoenix AZ 85032
made counter uses the very popular Intersil ICM-7216-D counter chip and the Fair-child 11C90 prescaier. Just add a feu discrete components, some LED displays, another three ICs and we have a very professional-looking frequency counter, I built this counter on a 3"x6" printed circuit board and installed it ¡in a small lightweight enclosure. The counter design is essentially lifted right out of the appli-
f/g. 1 Operating range of the 11C90L
This is a construction article for building a very simple, high-quality frequency counter My home-
PC board, foil-side viewi Table 7. Wiring guide.
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