Any Schematics for a LCD Air Fuel Ratio Meter out there?

Discussion in 'The Projects Forum' started by Josh Young, Jan 16, 2009.

  1. Josh Young

    Thread Starter New Member

    Jan 16, 2009
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    0
    Wanted to see if there were any LCD based AFR meters out there. I have seen the LED based AFR meters out there, and wanted something with a little more pizazz. A programmable unit would be nice, so I can set a given input voltage to read a corresponding ARF Ratio. Thanks in advance for the help,


    Josh
     
  2. Externet

    AAC Fanatic!

    Nov 29, 2005
    762
    57
    Pizzawhat ?
    Any LCD digital voltmeter can tell you ~450mV for good 14.7:1 ratio, less for lean and more for rich when connected to an oxygen sensor.
     
  3. Josh Young

    Thread Starter New Member

    Jan 16, 2009
    6
    0
    Externet,

    Thanks for the reply. I had read about the .450 VDC being 14.7:1, but wanted a circuit to give a nice Air Fuel Ratio readout instead of converting voltage to AFR. I may just have to go the DVM route with it, and make a little voltage / AFR conversion chart.
     
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