 SOT: electrical gurus check in..., how to dim LEDs? |
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| dlo914 |
 Nov 30 2012, 12:45 AM
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Whatchu' lookin' at?!?!  Group: Members Posts: 3,432 Joined: 6-September 04 From: San Gabriel, CA Member No.: 2,697  |
So i've retrofitted some LED rings into my daily driver, but i'm only using the LEDs as the running lights and using the filament bulb when brakes are applied. how would i go about using the LEDs for both running and braking light usage? i know i'm suppose to add a resistor to each positive LED wire, but i'm so confused as to what OHM rating or % etc i'm suppose to use. The guys at two radioshacks were useless.
Here's how they look at the moment: (IMG:http://www.914world.com/bbs2/uploads_offsite/i62.photobucket.com-2697-1354257938.1.jpg) |
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| Tom |
Nov 30 2012, 04:49 AM
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#2
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
LED brilliance is controlled by current flow. Current flow is adjusted by the resistance in series with the LED. Add more resistance, dim the output of the LED.
Less resistance = brighter until you over power the LED and it burns out. Not surprised by the lack of knowledge at Radio Shack. I will give your problem some thought and draw a circuit for you later today. Tom |
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Posts in this topic
dlo914 SOT: electrical gurus check in... Nov 30 2012, 12:45 AM
Tom Are these rings a plug in to the regular socket wh... Nov 30 2012, 05:58 AM Spoke For the brake light with higher intensity, as Tom ... Nov 30 2012, 08:26 AM Bartlett 914 I am doubtful that adding resistance will give sat... Nov 30 2012, 08:33 AM Nine_14 http://en.wikipedia.org/wiki/LED Nov 30 2012, 09:12 AM Tom Here is a simple led circuit than will allow the r... Nov 30 2012, 02:24 PM mr914 Temporary, or could be permanent...
Buy a variabl... Nov 30 2012, 03:04 PM Dave_Darling All the automotive LED taillights I know of blink.... Nov 30 2012, 05:23 PM
Spoke
If it were as simple as putting a resistor in lin... Nov 30 2012, 05:52 PM Spoke Here's a switching converter to efficiently dr... Nov 30 2012, 06:07 PM stugray There are off the shelf drivers that can do this.
... Nov 30 2012, 07:34 PM Spoke
There are off the shelf drivers that can do this.... Nov 30 2012, 07:51 PM nukepipe
So i've retrofitted some LED rings into my da... Nov 30 2012, 08:42 PM aircooledtechguy I'm probably missing something here, but if yo... Dec 1 2012, 12:09 AM falconfp2001 I would say you need to check this site out
http:... Dec 1 2012, 02:58 AM bperry Here is a link to a DIY article on how to wire up ... Dec 1 2012, 12:29 PM |
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