Use a strip of black tape on the axis then a led + photodetector to count
revolutions...

On 4/3/07, Dumitru Stama <spanac@gmail.com> wrote:
>
> Hi Guys,
> Is there a way to measure the RPMs of the folowing motor ?
>
> http://www.sierra.ro/import/motoare/motoare_cu_metanol/pentru_automodele/112000.html
> It is a model engine, it has no sparks because it runs on diesel-like
> fuel and uses a glow plug.
> I bought a small car which has this motor and i was wondering if i can
> see its revs in realtime
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