fading leds on a guage
Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=120410
Printed Date: October 31, 2025 at 1:04 PM
Topic: fading leds on a guage
Posted By: jgauthier
Subject: fading leds on a guage
Date Posted: February 28, 2010 at 12:24 PM
I want to put LEDs behind the instruments of my 97 dodge ram 1500, and I was wondering if there is a way to change the color of the of the LEDs with the guage, like on a tach, idling, the LEDs would be blue, and as the engine revved higher, all the LEDs would fade to red
Replies:
Posted By: oldspark
Date Posted: February 28, 2010 at 6:08 PM
Yep.
So what's your preference - a uPC or PIC or Fusion Brain etc, or discrete (IC) electronics...
The fading will be complicated for the electronic version (the color change isn't) unless perhaps multi-colored LEDs are used.
I suggest however the first step it to mount the LEDs and find the right combinations and brightnesses etc.
What you find there can have a big impact on the strategy.
For digital solutions, it's easy - just add LED drivers and program accordingly. The LED drivers might be PWM (Pulse-Width Modulated) circuits to vary brightness and fading.
There were also similar aftermarket gauges for cars and industrial applications (once upon a time?).
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