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Old 11-01-2007, 07:56 AM   #1
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Article on DIY O2 A/F sensor LED Gauge

http://autospeed.com/cms/A_0217/arti...popularArticle
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Old 11-01-2007, 12:02 PM   #2
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Yup. Here's where you can get the kit for 10 bucks (cheaper than the Autospeed shop) :

Mixture Display Kit For Fuel Injected Cars
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

I was thinking that two of these could be made to make a cool pre-post cat 02 sensor setup.

Here's a fancier one :

Smart Fuel Mixture Display for Fuel injected Cars
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

Jaycar and Autospeed seem to have a synergistic relationship. Autospeed features alot of their kits.

CarloSW2
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Old 11-01-2007, 01:58 PM   #3
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Would this work on my VX to let me know when I'm in lean burn mode? If it does it'd be worth it to me to put one in, installation sounds easy enough.
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Old 11-01-2007, 01:59 PM   #4
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It might not be programmed for linear sensors...you could always just hook up a DMM or program your own circuit to set off one light,
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Old 11-01-2007, 02:15 PM   #5
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Would this work on my VX to let me know when I'm in lean burn mode? If it does it'd be worth it to me to put one in, installation sounds easy enough.
It's designed for 0-1 volt narrow-band sensors :

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The most commonly used sensor generates its own voltage output, which varies between 0-1 volt. In round terms, if the sensor output is about 0.2 volts or less the mixture is lean, and if the output voltage is over 0.8 volts it is rich. However, the precise value of the output voltage is less important than its relative value - whether it is "richer" or "leaner" than the mid-point voltage.
Your wide-band would be running 0-5 volts. I'll bet if you google around, you can find an LED wiring diagram for a wide-band sensor.

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Old 11-25-2007, 08:56 AM   #6
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I built an o2 sensor gauge for turning my motorcycle. It works ;-) Narrowband.. but it was enough to get the jetting down in 3-5 runs instead of a whole weekend.

The whole rig is nothing special. it's a 5v reg to power the display, which is a 200mv panel meter, and a voltage divider to take the 0-1v output of the heated o2 sensor and make it between 0-100mv.

http://video.google.com/videoplay?do...77991342&hl=en
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Old 11-25-2007, 09:25 PM   #7
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Do you think I could install a narrowband 02 and be able to use the home-made AF gauge to be a real-time signal as to when the car is in lean-burn? Problem is, I wonder how slow the delay would be between the car going in lean-burn and the sensor telling me it's running lean?
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