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Pretty cool! IIRC, our cars use a light tube for the needle? I wonder if anything like this would be possible with some LEDs...
The one video was blue to red.... :huh:That's not very colorblind friendly..
If it were me I'd have it fade from blue to red... which seems to make more sense.
Stick a color changing LED clump in the one for the needle there... when a threshold is reached via a controller that monitors RPM have it modify the LED's being illuminated.... pretty much the same way my blackberry can change its LED colors...The needles are lit up by the 5 bulbs lighting up the whole cluster. Not sure how you could make just the needle change color.