i came across this site, http://www.geocities.com/motorcity/g.../theswap2.html. im pretty sure some of u have seen it. at the top are tow links that show the schematics to an led a/f gauge. only the 30 led link works but not the 10 led. anyone knows where to find the diagram for the 10 led a/f gauge? i know i can just go and buy one to save me any headaches. but every now and then i like to take on a project to keep me busy. those of u that are technically inclined with electronics, what do u guys think? should i even bother? id rather see how the 10 led diagram is so i can finish it in a matter of weeks not months.

 

Hey y'all!!!!!!!!!!

a electronics shop over here sells A/F monitor kits with 10 LEDs

i can get you one if you want to make one, around 30 bucks i guess?

HTH,

t..

 

I sort of like electronics , so I'll try and help you out.

The LM3914 is what most companies use when building these meters. The chip is from National Semiconductor and is quite cheap [I believe you can get them from Radio Shack].

The only difference between the 10 & 30 LED models, is the fact that the 30 daisy chains 3 of these chips together. Hell, you could string 10 together and have 100 LEDs if you wished.

Its a very simple chip to use, just take a look at the .pdf on there website....it gives you a schematic for hooking it up and also shows you how to daisy chain them together.

You could probably bread board one of these in less than 1/2 hour. Obviously soldering it up and making it permanent will take longer.

But, just to give you the heads up....stock O2's are NOT linear in there operation. Please go to Hondata's website for there write-up on Wide Band O2 tuning to clue you in.

 

hey thanx for your reply. i just saw this yesterday so im still thinking about taking up this project. i made my own custom led tach a year ago. took me about 3 months to finish it. but people seem to dig it when they see it. they trip out when i tell them i made it.

anyhow, thanx for that info on the o2 sensor being linear. ill see if this would be something i wanna do.


[Modified by sirminder, 8:48 PM 6/18/2002]

 

Very cool and done by yourself, I'm impressed

 

that is very trick. Ever decide on marketing that ?? Im sure that alot of people would be interested.

 

i have thought of it. but i wouldnt want a company like apc to try and market the hell out of it and end up being ricey. dont get me wrong, i dont hate apc. i just dont want it to be something everyone goes out and gets and then realizes its horrible, ie. altezzas lol

 

i wanted to do it until SIRMINDER messed it all up by saying that.lol

 

sorry bout that allmotorb18, just pretend i didnt say a word, lol

 

thats ok

 

Thats cool, just like Knight Rider