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From: (no name) (no email)
Date: Fri Apr 15 2005 - 04:18:34 EDT
Let me guess. The only component other than the 2 float switches is a
SCR transister, right? This is a very common circuit that has been in
use for many decades. I even use it on my boat for a Hi-Low bilge pump
controller.
Chris
On Apr 14, 2005, at 9:33 PM, KenJames wrote:
> I have designed and tested a neat circut that is a bilge pump
> controler. It
> uses the existing two wires
> that already go to the existing bilge pump/float switch on most
> boats, and
> adds only a second switch mounted at a higher water level (conneted
> to the
> same voltage supply as the original single switch)
> and this controler. The result is that when the low switch turns on
> nothing
> happens, then when the high switch turns on the pump operates until
> the low
> switch turns off.
> The much larger difference in water level that can be acheived by
> using two
> switches totaly elimantes 'backwash' and pump cycling.
> The circuit design includes an optional over-ride function that is
> actuated
> by simply turning the pump breaker off then on, at which point the
> pump will
> operate until the pump is turned off and left off for a few seconds
> then
> turned back on again, at which time the controler re-sets.
> I am willing to send the schematic and wiring diagrams, with all the
> (cheap
> Radio Shack) parts listed on the schematic to anybody who wants it.
> Anybody
> who is even a bit proficient with a soldering iron and multimeter
> could
> build it in short order.-Ken
>
>
>
>
>
>
>
>
>
>
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