DIY led help needed
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Lighting


Reply
 
Thread Tools Display Modes
Old 03-27-2013, 11:30 PM   #1
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default

DIY led help needed


I need idiot proof help I don't want to solder anything and I only have access to the net via iPhone so I can't use that nifty google calculator to find how many LEDs I need to get the right spread for a 24x24. If anyone could get me numbers and links to drivers/power supplies that'd be great
shrimpNewbie is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-28-2013, 12:06 AM   #2
dtejeda.arias
Planted Tank Enthusiast
 
PTrader: (5/100%)
Join Date: Mar 2013
Location: Revere, MA
Posts: 749
Default

Rapidled.com
dtejeda.arias is offline   Reply With Quote
Old 03-28-2013, 12:35 AM   #3
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

I'm pretty sure I have some things covered biggest question is how does running the LEDs in series affect my choice in power supply? Say for instance I wish to run 24 Cree xte at 1000ma 14 are cool white 10 are warm white two rows seven two rows of 5. Do I simply purchase a driver and power supply that supplies say 1amp and the needed voltage to run the 24 LEDs? Completely lost right now
shrimpNewbie is offline   Reply With Quote
Old 03-28-2013, 02:00 AM   #4
dtejeda.arias
Planted Tank Enthusiast
 
PTrader: (5/100%)
Join Date: Mar 2013
Location: Revere, MA
Posts: 749
Default

You'd get a driver that can support the amount of voltage your trying to run. If I'm not mistaken you can run it with the 32.99 non dimable driver. I'm currently at work(don't tell the boss) but will get back to you later on when I get off
dtejeda.arias is offline   Reply With Quote
Old 03-28-2013, 02:43 AM   #5
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,733
Default

When the LEDs are in series, the voltage drops per LED add up, so if you have 10 of them in series, you need 10X the forward voltage drop of one LED. The same current goes through each LED in turn, so you only need 1X the current per LED. In parallel, it is the opposite, you would need 1X the voltage per LED, but 10X the current.
__________________
Hoppy
Hoppy is online now   Reply With Quote
Old 03-28-2013, 02:46 AM   #6
dtejeda.arias
Planted Tank Enthusiast
 
PTrader: (5/100%)
Join Date: Mar 2013
Location: Revere, MA
Posts: 749
Default

Really? I just learned something new. So a 3v output will power a series of how many LEDs I have connected?
dtejeda.arias is offline   Reply With Quote
Old 03-28-2013, 03:10 AM   #7
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

Okay then thank you so much hoppy I'll be running them in series already got custom drivers from o2surplus that I'll be picking up on Friday. Two strings of 6. Will a 6.5 amp 24v supply power all twelve on separate drivers?
shrimpNewbie is offline   Reply With Quote
Old 03-28-2013, 05:06 AM   #8
nokturnalkid
Wannabe Guru
 
nokturnalkid's Avatar
 
PTrader: (83/100%)
Join Date: Apr 2007
Location: HI, but Pueblo, CO for now
Posts: 1,240
Default

Quote:
Originally Posted by shrimpNewbie View Post
Okay then thank you so much hoppy I'll be running them in series already got custom drivers from o2surplus that I'll be picking up on Friday. Two strings of 6. Will a 6.5 amp 24v supply power all twelve on separate drivers?
That's where my driver came from.
__________________
Schuber Wright 6 gal
Mr. Aqua 11.4 g...coming soon
30gal Journal - RIP
nokturnalkid is offline   Reply With Quote
Old 03-28-2013, 04:42 PM   #9
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

He's extremely knowledgable and helpful!
shrimpNewbie is offline   Reply With Quote
Old 03-29-2013, 03:38 AM   #10
nokturnalkid
Wannabe Guru
 
nokturnalkid's Avatar
 
PTrader: (83/100%)
Join Date: Apr 2007
Location: HI, but Pueblo, CO for now
Posts: 1,240
Default

Quote:
Originally Posted by shrimpNewbie View Post
He's extremely knowledgable and helpful!
I will not argue with that point at all.
__________________
Schuber Wright 6 gal
Mr. Aqua 11.4 g...coming soon
30gal Journal - RIP
nokturnalkid is offline   Reply With Quote
Old 03-29-2013, 04:07 AM   #11
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

Ugh ledgroupbuy won't let me buy more than 6 XML cool white
shrimpNewbie is offline   Reply With Quote
Old 03-29-2013, 04:08 AM   #12
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

Anyone got recommendations for spacing on a 10x6" heatsink for 18 Cree XML run at 2a each over a 24x24 tank?
shrimpNewbie is offline   Reply With Quote
Old 03-29-2013, 04:58 AM   #13
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,733
Default

Quote:
Originally Posted by dtejeda.arias View Post
Really? I just learned something new. So a 3v output will power a series of how many LEDs I have connected?
Back up a bit: LEDs almost have to be powered by a constant current supply, which automatically adjusts the voltage as needed. They cannot be powered by a constant voltage supply, with the current uncontrolled. LED drivers can be made for 120 VAC input, or some smaller DC input. But, a driver that needs a DC input also needs a AC to DC converter that supplies the driver with the needed DC voltage that the driver is designed to use. Either typo of driver will have an output of constant current (adjustable to some extent, but constant at the adjusted value), at a voltage consistent with the maximum power rating of the driver.

A 3 volt maximum, LED driver which supplies a constant 1 amp DC output (a 3 watt driver) will power only one typical 1-3 watt LED. To drive 10 of those LEDs in series requires a driver that produces at least 30 volts maximum output at 1 amp DC, so it will be at least a 30 watt rated driver. LEDs are not resistors, or light bulbs, so they require a different kind of electric circuit.
__________________
Hoppy
Hoppy is online now   Reply With Quote
Old 03-29-2013, 01:38 PM   #14
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

LEDs are ordered will. Order heatsink and other parts I may need after I get off work. Still not sure how I'll be wiring from drivers to LEDs since the drivers will be about 8 feet from the light. Wish I knew how to wire a s-dub connector
shrimpNewbie is offline   Reply With Quote
Old 03-29-2013, 10:55 PM   #15
shrimpNewbie
Wannabe Guru
 
shrimpNewbie's Avatar
 
PTrader: (4/100%)
Join Date: May 2011
Location: california, orange county
Posts: 1,891
Default DIY led help needed

D-sub or plastic circuit connectors? Trying to make it look as clean as possible
shrimpNewbie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 05:38 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012