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jackbauer · 11-17-2009, 02:32 PM

I built a cheap little circuit using an infrared opto sensor to drive the tach. If the shaft is shiny you can just mark it with a permanent black marker. I'll have a few videos and pics at the weekend.

11-17-2009, 02:32 PM	#277 (permalink)
jackbauer Master EcoModder Join Date: Sep 2009 Location: Ireland Posts: 734 Thanks: 26 Thanked 304 Times in 171 Posts	I built a cheap little circuit using an infrared opto sensor to drive the tach. If the shaft is shiny you can just mark it with a permanent black marker. I'll have a few videos and pics at the weekend.