Thread: Hall Effect Latch as an encoder/counter?
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Unread 11-02-2012, 08:14
Gdeaver Gdeaver is offline
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Re: Hall Effect Latch as an encoder/counter?
We have gone to an analog solution. We took a wire coil, some metal and a 12 pole magnet to make an alternator. We get a AC sine wave voltage output proportional to RPM. Next the AC is passed through a full wave bridge and then filtered by a cap and resistor. We then have a nice clean DC voltage that is proportional to the shooter RPM. One of our mentors brought in a scope to check the ripple and we have a nice clean responsive output. Also, the C-rio AD Is -10 to +10 volts. At full speed we are above 5 volts and are taking advantage for the first time of the high resolution that is available. So far it seems to work well. We originally used a small DC brushed motor until we got shot down by the GDC in a Q and A. Hint have you ever taken a stepper apart? There are many advantages to this kind of Tach.
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