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...)
I would have zero clue how to do that.
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