Any idea on the power level / onductance / resistance of the coil?
RP

On 30/09/05, Rob Robson <rob@silk.net> wrote:
> I'd be inclined to hang the pump off a variac to see how little AC amplitude
> you could get away with.  Also, the pump's coil might not be too thrilled
> with square waves, so you might have to do what the cheaper commercial
> 12V-to-120VAC inverters do and simulate a sine wave with a two-step
> staircase.  Just some thoughts.
>
> RR
>
>
> ----- Original Message -----
> From: "Harold Hallikainen" <harold@hallikainen.com>
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Sent: Thursday, September 29, 2005 4:10 PM
> Subject: Re: [EE] DC drive to aquarium diaphragm pump ideas?
>
>
> >
> >> ....
> >>
> >>> 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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