DIY AFR meter

Easy to make and very few components are needed.
CHAPTERS
00:00 - Intro
00:05 - Parts
00:11 - Schematic
00:14 - Testing
00:23 - In car

[@neyney5469]

Can you please give tha schematic diagram & where i can buy this materials? Its a very big help rhank you

[@jusubbidiy]

Schematic diagram czcams.com/video/vSpAhKavnjc/video.html materials you can buy from online on local store. beware of fake lm3914 chips.