Wide Band Oxygen Sensor, request for comments.

[cbrooks1]

Hi Paul, thanks for the info and link. You mentioned sim software...

Check out http://www.electronicsworkbench.com/html/demo.html it's a demo version of the software formerly known as Electronic Workbench. The demo version doesn't allow you to save circuits and is limited to only a handfull of components in the circuit but it's a good resource for hobbyists. 

Charles Brooks
Mid-Atlantic Speed Shop
http://www.massmotorsports.com  

---------- Original Message ----------------------------------
From: "Paul" <paul at vb.co.za>
Reply-To: diy_efi at diy-efi.org
Date: Tue, 13 Jun 2000 15:46:12 +0200

>Hi Guys
>
>I been gathering info from numerous sources, too many to mention.
>
>I've put together a web page with the information I've gathered so
>far.
>
>http://www.vb.co.za
>
>
>Please could those who are interested, take a look, and comment.
>
>PLEASE PLEASE REPORT ANY ERRORS(Theres bound to be some).
>
>I'll be sourcing some components, OP amps, etc and I hope to put a bread
>board
>prototype within the next week or 2. If anyone's got any circuit simulation
>software that we
>could use to prove any of these CONCEPT designs, without actually
>prototyping, then please get in touch.
>
>I'm going to concentrate on the design of the circuitry to produce a
>voltage(0 - 5V), that
>will be a linear representation of Air/Fuel ratio. But I have an exisiting
>circuit design
>that will enable you to take the output from this circuit, and produce a
>signal that
>simulates the expected output of STANDARD oxygen sensors(Bicycle crank). I
>will be prepared to help
>those that need this feature. BUT I will not be producing any designs on a
>SOLO basis to
>support this feature. If enough are interested(in helping) we could produce
>a version with a switch
>on the case(Wide Band / Standard).
>
>Also the design requirements, are strictly for a linear output
>voltage(0-5v), NO FANCY LED
>DISPLAY,NO METER etc. Literally a small box with 2 connectors.
>
>1.	8 Pin connector to Honda Sensor
>2.	4 Pin connector to ECU etc. (+12V,GND,A/F Signal,A/F Ground)
>
>I encourage those of you that have a sensor to attempt to build the concept
>circuit.
>To avoid damage to your sensor try to remember the following.
>
>1.	Make sure heater is operational before trying ANYTHING.(apply 12V wait 3
>minutes)
>2.	Make sure you have some sort of protection to prevent Ip from exceeding
>20mA.
>
>PLEASE NO .... "I TRIED IT BUT IT DIDN'T WORK", or "IT WORKS GREAT". What we
>need is a minimum
>of Ip current VS Air/Fuel Ratio, as on the web page.
>
>PLEASE UNDERSTAND THAT THIS IS A NON PROFIT PROJECT, IF YOU INTEND TO TAKE
>ANY OF THE ABOVE
>INFO FOR COMMERCIAL GAIN, YOU ARE GOING TO END UP STEPPING ON A LOT OF
>PEOPLE'S TOES.
>
>ALSO THE AIM OF THIS PROJECT IS TO PRODUCE A WORKING CIRCUIT THAT IN REAL
>LIFE GETS THE JOB DONE,
>IF YOUR LOOKING FOR WORKS OF ART, OR SHOW PIECES OF CIRCUIT DESIGN. THEN
>THIS PROJECT IS NOT FOR
>YOU. THIS IS A HOBBYISTS PROJECT WERE WE CAN ADAPT AND CHANGE THE CIRCUITRY
>AFTER WE HAVE PRODUCED
>THEM.
>
>
>
>Paul
>
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