nuckollsr(at)cox.net
Guest
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 Posted: Fri Jul 13, 2007 1:54 pm Post subject: Circuit for automatic fuel pump engageing |
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At 12:20 AM 7/9/2007 +0200, you wrote:
| Quote: | Hello all,
I am looking for some hints / circuits for automatic switching of my fuel
transfer pumps. As it is standard with the Lancair 360, I have two wing
tanks and a header tank. As I do not want to switch on the transfer pumps
manually every 30 minutes, probably forgetting it at all, I want to build
in an "intelligent" circuit doing it for me.
My set up is, that I have a capacitive level sensor in the header tank,
providing 0 to 5 Volt depending on the fuel level. In addition, I have an
independent sensor at about 15 gallons which will give me a last warning
in case the circuit or transfer pumps isnot working.
Does someone already went through this experiment and is willing to share
his wiring drawings with me ? Even it is possible to develop something
like that by my one, one does not have to re-invent the wheel.
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The board that assembles the product described
in these documents . . .
http://www.aeroelectric.com/Catalog/AEC/9011/
Has up to 4 a/d inputs and up to 3 open collector,
moderate current pull-downs (1A) and good program
space. If you could send me a schematic of your
"manual" system and a brief Product Performance
Specification as to how you'd like the thing to
work, I'll have my software guy look at it.
Bob . . .
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( "Physics is like sex: sure, it may )
( give some practical results, but )
( that's not why we do it." )
( )
( Richard P. Feynman )
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