> On Thu, 2005-09-29 at 15:23 -0700, Harold Hallikainen wrote:
>> I have an application where I need to drive a diaphragm pump (like those
>> used in aquariums) from low voltage DC (battery). Here in the US, these
>> pumps are mechanically tuned to run directly off the 60 Hz line. A
>> single
>> coil on a core moves an armature that has a couple magnets on it. The
>> armature moves back and forth at 60 Hz, vibrating the diaphragm.
>
> This may be too simple, but why not just purchase an inverter? It sounds
> like this device doesn't use that much power, and inverters of smaller
> wattages are very cheap these days.
>


We're going to be shipping several thousand units a month. The pump is
about $5.00 I'm trying to keep costs down.

Thanks for the idea, though! Keep 'em coming!

Harold



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