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#1
04-04-2011, 06:58 PM
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What size wire are you using there to connect the LEDs? Looks a tad too large to me, which makes soldering difficult since you need a lot more heat with larger guage wire. Solder joints don't look too good in the last pic. My guess is you had a cold solder joint and all it takes is one to prevent current flow through your series of LEDs. You may end up frying all your LEDs or the small wire runs on the starboard by needing too much heat with large jumper wires to get a good solder joint. Also, not sure the way you've secured them with screws is the best way to go.
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build  http://www.canreef.com/vbulletin/showthread.php?t=82206
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#2
04-04-2011, 07:58 PM
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Thanks for the help Mike. Originally I had used smaller gauge wire but I tore all of that out to troubleshoot the LEDs individually or in shorter series. I guess I can pick up smaller wire and re-solder all of the LEDs to see if that solves the problem as its 16 G wire that I had used for the last pic.
At the time I purchased the LEDs, I didn't know that there was thermal adhesive available to glue the LEDs to the heatsink so I drilled and tapped the heatsink to mount the LEDs instead. It was a painstaking process and I will not be doing that again if i build another LED light.
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Do or do not....there is no try. Last edited by Stones; 04-04-2011 at 08:01 PM.
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#3
04-04-2011, 08:40 PM
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just looking at some of the solder in the pictures they do look cold. did you pre tin all the pads? you want to pre tin the pads and the wires then solder them togeather that way will give you a much sounder conection.
also with the meanwells you want to adjust the max curent down to 1000mA befor you hook it up to your aray to prevent over current. Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive.
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#4
04-04-2011, 09:29 PM
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Interested to see if you get this working because I ended up giving up on mine after I couldn't get it working. I had major problems with soldering and wiring. Apparently you need flux core solder... I didnt know that and not really sure if I have it or not still haha.
Good luck! p.s. you can get thermal glue at Rona!
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#5
04-04-2011, 11:08 PM
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Thanks for all the pointers guys! I was using rosin core solder and did pre-tin all of the terminals on the LED pcb's but I didn't pre-tin the tips of the wire. I'm going out to pick up a better soldering iron and some thinner wire here tonight so I'll let you know how i make out.
I've done a few small soldering jobs in the past (LED moonlights) and have never had any issues but I guess there is a first for everything...
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Do or do not....there is no try.
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#6
04-04-2011, 11:26 PM
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like most said keep you screws and soldering job is clean no loose wires or solder touching the star. And it is better for agonizing drilling and tapping into the heat-sink for if any problem arises later with individual led.
check some of the work i done on my arrays.  here is another  Last edited by eli@fijireefrock.com; 04-04-2011 at 11:33 PM.
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#7
04-06-2011, 01:34 AM
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Well my prayers have been answered. This might help you too:
http://www.rapidled.com/servlet/the-...or-CREE/Detail
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Hybrid Mode
