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As you maybe know i bought an used wideband.
With red digits.
But i really dislike red light in my car - so i had to find a way to make it blue.
First problem:
Finding blue lighted 7 digit led displays.
I found them.





Hmmm, grey, but who cares...

But i had some very very very big problems!
- it was a pita to remove the old digits
- the new digits are 1mm bigger
- and so are also the contacts
- the circuit board from the new digits (pin assignment) is different - 3 pins are different - and to rearrange that was a very big problem. I had to cut some conducting paths and rewire the circuit board.
I can say that was the absolutely most complicated soldering job i ever made (and i soldered cellphones to blue light and many more freaking small things)!
I guess i will not do that again (but hmmm, i still have a set digits left...)
So i cannot give you a how-to, this project is top of PRO-league!

But here are some pictures of the modified circuit board with the rewiring and some light output pictures.

I worked in summary ~10 hours on it - and for just 3 digits thats dammit much!!! (I change the smd leds in a cellphone in ~30 minutes....)
I think you can understand how proud i am now!
I hope you like it also.
(And: Yes i know, now they sell that also with blue digits, but it was very cheap and used...)

Well done!

wow good job, thats more than i'd like to go through to change the color haha but i have to agree i like blue better

LOL jesus man, that's impressive! Great job I would have zero clue how to do that.

looks good man!
in for incar pics!!!

nice work.

Looks nice. But it's not worth all that PITA work. haha

looks good!!!!

oh it is worth! definitely!
if everything in the car is blue lighted - even the skin for the mp3-player in my tv - red digits would look totally misplaced!
I like to have it blue - and if you look at my older jobs you will see that i spend a lot of time and brain for that.

I lighted in blue cellphones (the old models with the green light), the switches in many radios, home hifi, different speedos whatever you can imagine were a light is in - and all that >10 years ago when blue LEDs were very rare and expensive!
And all that was complicated (example: green LEDs in cellphone work with 2.3V, the blue with 3.2 - how to raise the voltage now??)...
I modified LCD displays with EL-lighting - they were green lighted with black letters and i lighted them blue with white letters. Therefor i had to remove the polarisation film on the display!

So if I really wanna have that (or someone else is asking me) - I will do it...

The result is worth the stress.


And hmmm - i guess for the next wideband i will need less than half the time...

wow! very cool mod sir

This is the reason I have switched over to VEI gauges. LOL nice work though

i like it! i never seen this before, ive always wondered about doing that with the AEM.

nice

2 new pictures:






Dammit the old aem gauges are soooo stupid - the wires are directly installed to the gauge - so i cannot just plug them out to remove the dashboard cover.
But gladly i noticed that BEFORE it was to late...

Nice work

Now get your odometer to blue

I like how you made it say "P00."

Now that, THAT is some god damn fine work! I applaud you good sir, I applaud you!

FAC3L3SS wrote:I like how you made it say "P00."

i never thought about THAT!

wow.....im impressed

Looks good man

Awesome set up !! Well done Jenni.

I like it.. Great job.