> > You can buy them for $5 off eBay anyway.  Clock, odometer, trip distance
&
> > time, current, max & average speed, RPM, wheel size etc.
> >
> >
> Yes he could but he wouldn't learn near as much.
> Jim


True, (and there's plenty of applications where you need to count spinning
things), but the main impetus was the store-brought devices were expensive.
He's looking in the wrong spot.  And they're not that simple a device,
they're getting quite (often pointless) feature packed these days.  I've got
one that measures distance to 4 decimals places, that's a bit of overkill.
I could use it on a scale model I suppose.

He should pull a VFD out of a microwave & use that for a display.  Now
that'd be cool.  I've got the perfect one kicking around here somewhere.

Tony

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