Low Fuel Circuit Suggestions - Team Camaro Tech
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post #1 of 3 (permalink) Old Feb 8th, 06, 09:58 AM Thread Starter
Join Date: Aug 2005
Posts: 14
Question Low Fuel Circuit Suggestions

Please help. I am trying to put together a low fuel warning lamp circuit using a radio shack "led" with transitors and resitors ect.
What I would like to do is use the 0-90 ohm sending unit side of the autometer fuel gauge to signal the led to light up at about 20-25 ohms or
1/8" of a tank.
I tried a circuit I found here at Team Camaro posted by SOA Nova but I could not get it to work with the "led"
I know I can buy something at Classic Industries but what fun is that
Any suggestions would be great.
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post #2 of 3 (permalink) Old Feb 8th, 06, 04:28 PM
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Join Date: Dec 2002
Location: Saint Louis, Missouri
Posts: 1,096
Re: Low Fuel Circuit Suggestions

Did you get it to work with the 12V radio shack light ?.

1974 Spirit Of America Nova (being restored), 1973 Nova Custom, 1968 Chevy II (Garage Find 2012)

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post #3 of 3 (permalink) Old Feb 8th, 06, 08:44 PM
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Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Re: Low Fuel Circuit Suggestions

You need a window comparitor circuit. You can make one with a comparitor IC, or an op-amp and a hand full of resistors. RS should have all the parts you need. I estimate it will cost about $5 to build.

68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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