A relay will never be fast enough. A transistor would be though. If this is a
points type system that will be off the negitive side of the coil then the
flyback from the coil will be more than enough to trigger it. Have you tried
hooking up the tach to 6 volts and seeing if it works yet? I doubt if it would
hurt it in any way. It will just be a 12 volt system with a low battery.
Dave
todd wrote:
>
> First.. Yes I will eventually be changing to a 12v system all together.
> With that said.. is there a good way to trigger a 12v tach in a 6v system?
> Was thinking about running a 12v battery seperate for power and seeing if the
> 6v fromt he coil would still trigger it? Also had the idea mentioned of
> running the 6v trigger to a relay that pulled 12v to the tach when triggered?
> Thoughts? Ideas? Known facts?
> Todd Dross
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