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connect 1-5 volt fuel level sender to legacy type fuel gage

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millner(at)me.com
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Posted: Fri May 11, 2012 12:48 pm Post subject: connect 1-5 volt fuel level sender to legacy type fuel gage

Hi Bob,



I'm toying with the idea of installing Electronics International's new 

magnetic fuel level senders, that output 1-5 volts from empty to full, 

to interface with a JPI 930 or similar.



However, I'd like to continue to make the legacy 12 volt Wheatstone 

bridge style needle gage work...



I've been puzzling over how to fool the legacy gage into thinking it's 

seeing a resistance, comparable to the stock potentiometer fuel level 

sender, via a conversion circuit that's looking at my new senders' 1-5 

volt output in parallel to the JPI monitor.



I'm filling the paper with voltage sources and current sources, but I'm 

not sure I'm getting much closer to a circuit design... seems like it 

shouldn't be hard for someone with at least a little insight, but so far 

I'm not bringing that insight to bear.



Thoughts?



Paul

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