Note: The WBO2 project is defunct, and these pages are no longer being actively maintained.

A typical OEM switching type O2 sensor will not work with this project.  This project requires a 2 cell wide band O2 sensor that was used on some lean burn Honda Civic's, more info can be found below under Sensor Info.

• Usage conditions
• Sensor Info - information on the sensors to use with the DIY-WB controller
• Parts list w/Digikey part numbers -- HTML
• Parts list w/Digikey part numbers -- Excel
• Chip selection notes - preferred chips to use with the DIY-WB controller
• Schematic -- heater control  - .gif format.   .jpg format (.jpg will print on 8.5x11 page)
• Schematic -- O2 sensor interface part 1 - .gif format  .jpg format (.jpg will print on 8.5x11 page)
• Schematic -- O2 sensor interface part 2 - .gif format  .jpg format (.jpg will print on 8.5x11 page)
• Construction notes - tips on building a DIY-WB controller
• Enhanced DIY-WB Assembly Guide (local cache) for the DIY-WB controller (with pictures)
• DIY-WB Controller Troubleshooting & Checkout (new 3/13/02)
• DIY-WB controller output voltage to AFR reference
• Displays for the DIY-WB controller (updated 7/20/02)
• picture of assembled circuit
• picture of the Honda/NTK sensor
• data sheet for O2 sensor (PDF)

Interested in a one-stop parts kit?  Get all the parts in one kit, no sensor or PC Board:

Want a display for your DIY-WB?

All contents Copyright (C) 2001, 2002. Permission granted for non-profit non-commercial use only, all other rights reserved.