The circuit shown in the figure is a three-digit tachometer that lets you measure low-frequency events recurring at intervals of 0.235 to 15 seconds--that is, from 4 to 255 rpm. Thus, it's suitable ...
You Can Buy Rev Counters on the Cheap, but Are They Accurate? We Find Out. Every Hot Rod should have a tachometer, and if yours didn't come with one you've got a ton of options. With a Benjamin as the ...
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