DIY Air/Fuel Ration Meter

[MagTech]

Title: DIY AIR/FUEL RATIO Meter


What: This is a poor man's narrow band A/F Ratio Meter. It cost me less than $10 and 3 hrs of my time.
I'm expecting that this little box will provide me also a little information about air and fuel mixture of my engine.


You'll need: Vehicle Voltage Monitor (from Dick Smith) Special Price $7.49
Zippy Box (from Dick Smith) $2.50

This kit can also be used as Battery voltage monitor, Air Flow Meter or Air/Fuel Ratio Meter. But at this point I intend to use it a AFR Meter


Difficulty: If you have a little background in soldering, this kit will be very easy to build. The kit comes with an instruction and parts references.


ETA: How long does it take for a novice? 1-3 hrs
Instructions: I will not include the instructions anymore on how I build this project since the kit comes with it.
So what I will just show you are some photos during the construction and the finished project.

Kit and zippy box


All parts layed up for checking if complete before starting.


In-process of soldering the parts.


All soldering were done, just needed to sit the IC.

[MagTech]

This is how I soldered and connected all the parts.


This is how I fitted the pcb inside the box, little mod in the box and the pcb.


Box with $0.20


Now ready for installation



Reference: Autospeed also made article on how to build a similar gauge. https://autospeed.drive.com.au/cms/A_0217/article.html

Sorry for typo error: Ration=Ratio
Can somebody correct the title please. Thanks

[Shawn]

thats cool, i like those dick smith kits. i made an electronic dice once.

anyway, will there be a follow up on this, how and where to wire it to the car...

[Mr_Roberto]

dig much?

[Shawn]

oh yeah, sorry bout digging up old posts...

[Ers]

dig much?

Yeah why not just start 30 threads on the same topic.......

Oh wait.....