The Shop > Electronics & IC Programing

hacking a tacho module?

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hopefuldave:
Kanga products here in the UK have 'em too, a whole pound-fifty plus post. In the same package style too! I've fired off an enquiry re fundamental vs overtone and suitability, waiting with bated breath... Got to be worth a try, its about the only leaded part on the board!  :D

Dave H. (the other one)

andyf:
In the distant past,  I've bought xtals from QuartSlab http://www.quartslab.com/ . They seem to have been away since I last dealt with them. I mention it only because they will make one for  almost any frequency you fancy.  Kanga will be a lot cheaper.

Andy

John Rudd:
How about a second 70 tooth gear driven by the orig, hang a 60 hole disc from the idler?  :scratch:

Ok, I'll get me coat....  :loco:

hopefuldave:

--- Quote from: John Rudd ---How about a second 70 tooth gear driven by the orig, hang a 60 hole disc from the idler?  :scratch:

Ok, I'll get me coat....  :loco:

--- End quote ---

Or even a 14 tooth with a 12 hole disc, 21 tooth with 18....
Could even add a Gray-code disc to give spindle position and direction...


No, don't get me started, no room for that, either!

Dave H. (the other one)

andyf:
You mentioned using a reflective sensor. Can't you just use a disc of something shiny, paint 60 black spokes on it, stick it to your 70T gear and aim your transmitter/sensor at it?

Andy

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