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Circuit for automatic fuel pump engageing

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air.peter(at)googlemail.c
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Posted: Sun Jul 08, 2007 2:23 pm Post subject: Circuit for automatic fuel pump engageing

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.

Thanks in advance,  



Peter Lancair 360 (85%)

  [quote][b]

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