Thanks for the comments! I'll probably do a little experimentation this
week. On using some sort of inverter to generate line voltage 60 Hz, it
doesn't seem cost effective. We already have a coil (in the pump), so why
add two more (a transformer). Just my opinion...

Again, THANKS for the comments. I'll experiment with one of the existing
pumps this week.

Harold

> Harold,
>
> I'm curious why you don't just try your idea.  It looks reasonably sound
> and a quick test with a 555 (or suitable substitute) where it's easy to
> alter the frequency and duty cycle would get you a good answer in under
> an hour.  It seems that if you can use the existing pumps "as is",
> that's the way to go.  Go with plan 3 if there's any reasonable way to
> make it work.
>
> Dave
>
>>Thanks for the comments! Since there's going to be a PIC in the product
>> to
>>handle other stuff, I'm planning on having it drive a transistor or two
>> to
>>drive the pump. The trick is, should I:
>>
>>1. Rewind the pump using a center tapped coil and pulse each end of the
>>coil to ground, or
>>
>>2. Rewind the pump with a single ended coil and pulse just one end to
>>ground (mechanical resonance possibly would take it back the other way).
>>
>>3. Don't rewind the pump, but make the coil resonant so I can get enough
>>current with low voltage drive (as mentioned in the article I posted
>>previously in this thread).
>>
>>Again, THANKS for the comments!
>>
>>Harold
>>
>>
>>
>>
>
>
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