> inaccurate and changes value with vibration. What I am really > interested > in is the RPM sensing circuit. > Rich Blake
Actually, the rpm sensing capability is overrated... when I was building my module, there was a whole discussion of that circuit on the vortex, and, just like Math says, no-one could get the rpm sensing to work. So I built my circuit without it; instead, I wired up an extra LED in the cluster to light up at WOT. Believe me, when you have the visual feedback from a LED, your right foot learns the "almost-but-not-quite-WOT" position very quickly. Hence, I've never felt any need for rpm sensing. Cheers, Oleg
