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Originally Posted by ETodd
Before I even start... I've already searched all over the forums.
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Thank you!
Quote:
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Originally Posted by ETodd
So we hooked up an oscilloscope to it, and it's not registering any sort of pulse.
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On the First hand, the hook up: From left to right, you want Ground, (nothing), +12 volts, Ground, +5 volts, and the last one is the signal output. That's right on the board.
On the Second hand: The GTS will sense the passing of a ferrous (Iron-based) object. Make sure a magnet will stick to your "gear".
On the Third hand: The Ferrous Gear must be within about 3 mm to be sensed. 1 mm is better and more reliable.
There is also a frequency limit, but it is doubtful you have reached that. Make sure the 'scope settings are such that you will see the pulses: The voltage will be around whatever is at the 5 volt input pin. You will see normally 0 volts with a brief pulse for each 'tooth'.
On our test rig, we used a flat steel bar, about 1/4" wide and 1/32" thick, 1.5 inches long, spun with one of the small fast motors in the KOP. We took great care to ensure the GTS was not struck by the bar as it spun.
Let us know how it turns out please! Also, we still can't figure out the interrupt code, so if you get something I'd be grateful if you could explain it to our programmer...
Don