two stage led footwell lighting
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=102575
Printed Date: May 14, 2024 at 11:43 AM
Topic: two stage led footwell lighting
Posted By: j5ive
Subject: two stage led footwell lighting
Date Posted: February 26, 2008 at 3:12 PM
Hi all,
This is the idea I have. I want to add footwell lighting to my car. But I want it to be on, but not full brightness when the lights are switched on (dash lights on), and go to full brightness when a door is opened.
I've read before of people using PWM for the two-stage effect for LED taillights where there was only a single dual-filment bulb. But my knowledge is very limited, and I've never worked with timers, ICs, anything like that. So unless there are cheap, ready-made PWM controllers, I'm probably not going to be able to do that. Another idea is to use a relay and resistors to supply different amounts of power to the LEDs. Or maybe I should just wire up LEDs in different circuits so that maybe only two lights up with the interior lights, and three others will turn on when the doors are open?
I welcome your insights and suggestions.
Replies:
Posted By: ShaunD912
Date Posted: March 11, 2008 at 10:54 PM
You could wire a relay as follows:
Pin 85 = ground
Pin 86 = door trigger (+)
Pin 87 = 12v from parking lights (full brightness)
Pin 87a = 12v from parking lights with resistor in series (resistor value determines how much the light is dimmed)
Pin 30 = lights
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