> ....
>
>> Any ideas?
>
> a small DC motor that you run at 60*60 RPM that moves a piston rod back
> and
> forth that physically toggles a switch between positive and negative
> voltage.
>
> - Marcel


Pretty elegant! Actually, if I had the DC motor, a crank on it could run
the diaphragm directly. Turns out this pump is incredibly cheap (cheaper
than a motor), so I'm trying to figure out a cleaver way to drive it..

Thanks for the ideas... Any more?

THANKS!

Harold


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