My DIY 10watts LED

[jcardona1]

UPDATE:

I just ran the LED's today for 2.5 hours and they get very very very hot, even the power supply gets very very very HOT....

I WOULD NOT RECOMMEND THIS.... it is way too risky.. Im going to cut those power supply and order some LED drivers that will run cooler, I can't risk getting fire.

Yeah that is a tiny heatsink for a 10w LED driven at 850ma. You could try hooking up a fan on top of the heatsink

 

[outlaws]

could it be the heat trapped inside the bowl and the glass? doesn't seem like there is much circulation going on there.

 

[epond83]

I beleive most LED's put off their heat out the back, the heat sink is atached the the circit board (more or less). The Light put off has little heat to it unlike most light sources.

 

[lmt6600]

I prefer the chinese 10w like the grey one you have. why do all the extra work. you can get them on ebay for $25!

Yes, i could get two more of those but that would be 50 bucks atleast.. im at 28 for the two 10watts, but I think peace of mind will be an issue with DIY.

 

[Penthrox]

I hope you have waterproofed the ends of those wires, otherwise a fire will not be your only problem.

 

[O2surplus]

UUUUUUHHHHH......... I don't see a current limiting resistor anywhere in your setup. You're essentially maxing out your power supply and relying on it's protection circuitry to stop any thermal runaway, I.E........ FIRE! Without a resistor the led is almost a dead short as "seen" by the power supply. That explains why your power supply is running so hot. You need to go back and review the led's specs to determine the appropriate ohm value of the resistor to limit current to the desired value or use a commercial led driver.

 

[lmt6600]

UUUUUUHHHHH......... I don't see a current limiting resistor anywhere in your setup. You're essentially maxing out your power supply and relying on it's protection circuitry to stop any thermal runaway, I.E........ FIRE! Without a resistor the led is almost a dead short as "seen" by the power supply. That explains why your power supply is running so hot. You need to go back and review the led's specs to determine the appropriate ohm value of the resistor to limit current to the desired value or use a commercial led driver.

You are absolutely right, I did make this mistake. MY LED's are still OK, i just cut off the power supply and ordered LED driver.

 

[B_IN_SD]

Have you seen the heat sinks with a brushless fan attached ? They are pretty cheap on ebay.

 

[lmt6600]

Update: I added a resistor on my 1000mA power supply while waiting for my LED driver, Its working great, doesn't get hot , just warm.. not as bright but plenty bright for me.

So if your planning of doing what I did using a regular power supply, MAKE SURE you add resistor.