Dimming /w LM317 regulator
Printed From: Utah Reefs
Category: Specialized Discussion
Forum Name: DIY
Forum Description: Do it Yourself
URL: http://www.utahreefs.com/forum/forum_posts.asp?TID=63593
Printed Date: July 17 2025 at 3:55am
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com
Topic: Dimming /w LM317 regulator
Posted By: Krazie4Acans
Subject: Dimming /w LM317 regulator
Date Posted: April 10 2013 at 12:54pm
I have a board that is driving 5 strings of 5 - 3 watt LED's. The board has individual circuits for each string and each circuit is current controlled by an LM317 and a resistor.
Does anyone have any quick designs that would allow me to make this LM317 circuit dimmable? resistive dimming would be the easiest as the driver board is already mounted in a hood and space is not overwhelmingly available. A 555 PWM might be an option if i can control them all with a single dimmer circuit.
Any thoughts and ideas would be very helpful. Thanks Krazie
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My ocean.
90g (yup, won it!), 40g, 28g, & 10g Systems
PADI Advanced Open Water
http://utahreefs.com/forum/forum_posts.asp?TID=63568&title=krazies-nano-paradise" rel="nofollow - Tank Thread:
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Replies:
Posted By: Erikts
Date Posted: April 10 2013 at 1:55pm
http://www.utahreefs.com/forum/forum_posts.asp?TID=47456&KW=LM317&PN=1&title=super-cheap-dimmable-led-driver-cost-under-3" rel="nofollow - http://www.utahreefs.com/forum/forum_posts.asp?TID=47456&KW=LM317&PN=1&title=super-cheap-dimmable-led-driver-cost-under-3
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34G solana
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Posted By: Krazie4Acans
Date Posted: April 11 2013 at 12:25pm
Thanks Erik!
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My ocean.
90g (yup, won it!), 40g, 28g, & 10g Systems
PADI Advanced Open Water
http://utahreefs.com/forum/forum_posts.asp?TID=63568&title=krazies-nano-paradise" rel="nofollow - Tank Thread:
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