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Old 05-20-2010, 06:26 PM   #11 (permalink)
dcb
needs more cowbell
 
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I think this device looks promising
1GT101DC Honeywell / Microswitch Industrial Hall Effect / Magnetic Sensors

Tell you what, I need some more chips. I will order one and see how it goes. But in theory you should be able to point it at any rotating lump of metal (i.e. bolt head on cv joint)

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