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Oh the roll of mains cables was be to used for all connections also the output from the drivers to the chips, if they where external that is.

Yes the soldering is strange why not use the pads, and a transformer these days, it's properly to make the light heavy, so a customer think, I'm getting the real deal here. The driver from one of my 10W white flood lights.

The DIY MODDING mania continues and today I'll introduce the RL10 Cryogenic Lightning Propulsion System :mrgreen: The fixture for the halogen bulb has been removed and the cone end is made flat and even. Top view: Side view: - sometimes luck is a factor| I made M3 threads in the...

I'm happy to see that my new EPS 550W PSU's are not drawing 14 watts like the one a bit older, but only 8W, so I've updated the image above, for it change the situation a bit now it would make sense to only draw 70-100W from a single PSU vs. 160-200W when considering the energy efficiency of...

I think the next on your wish list should be a roll of cheap mains cable, so the cables are long enough to go up with the hanging wires and down all together to the "Driver" box -ballast is for old HPS/MH lights. And I would recommend using cable joins like these, where you cut two out from...

Along with the heatsinks I also bought 10 red and 10 blue Osram LED's since they cost about 2$ and seams to be able handle 2W, to play with, and see if i can 1. avoid re-flow soldering and 2. compare the output to the no-name LED's PAR value for watts used. Incredible efficiency 44% at 100mA...

Hi Impressive plant :cool: looks very sticky and frosty, incredible with that low power consumption, and I see the results is archived by doing what I have been pushing for, cough, minimal distance and enhanced reflection. :bigjoint:

Dont know about glue, but the 3x1W PCB star-heatsink from a emergency sign i got, is fitted with a square double side thermo conducting tape patch, the size of the pcb star that is very sticky, and can be reused if the LED needs replacing. The best way to test the driver is when using a...

Hi I've made the circuit from your link in this free Circuit Simulator and scaled it up to 30W and using a 36V DC power supply, to power 24-28 pcs of 3W red LED's and I have designed it around the fact that resistors come in fixed values so it's either 0.33 ohm making the LED's draw 810mA or...

Don't know what a transmission cooler is, sounds like something from a car's gear box or something, but looking at the picture I can't see anywhere to mount anything ? it's maybe a good cheap radiator for water cooling thou.

I think I've just done a great deal on heat sinks(don't know if that is the case for you guys), I spend half an hour searching for a large cheap sink, but every time it had to do with LED's the cost was double or worse, but then I just spend time scroll browsing the site, and found this...

Hi, This site's LED section and it's many DIY thread would be a good place to start, I recollect Jubiare's thread has some LED composition and driver calculation, MajorCoco and Gastankers threads focus on big ass chips, and make it very easy with two wires and four screws basically. But it's...

Damm that's cheap, even if tax and vat will double the price, 10 of those with 30-50 watts chips would make a relative cheap, easy and very flexible DIY light, only thing missing is reflective barn doors. :-)

Thank you , yes water cooling is not something you fit to a UFO or an Apollo I think, if you start from scratch and plan accordingly then maybe one can justified spending that much on cooling. All modern CPU have overheat protection, can't see why a bi-metal cutoff switch at 50-60°C won't...

You don't say if you planning to have a fan blowing on that thing but it looks to small either way, and I think a normal CPU cooler would be better[based on my test in the thread 'Led under the microscope'] or a very large passive sink(noise less). I think there is a relationship between active...

We are using Model-T versions of LED grow lights, and I'm sure in 10 years it will be different, and the HPS bulb is from the 60's or something.

The circuit I've designed is drawing way to much current 1.7A so if this had not been a simulation then the 3W LED's would be toast. :idea: If someone wants a challenge we could say that the 12 volt are fixed, so we have to fit a resistor in series with the right value, so the current is...

DOH3SHA > "is anyone gettign a restrict access when posting and have to fill out the number letter box to verify? " Yes, I have, pain in the but reading these letters.

Thanks your self, I did not know the program could exchange circuit like this, and has all these functions. In order to simulate a LED right the program has to know it's IV curve(The charts I've been making) so it properly just have one default. so changing the voltage value is really not...

When connecting LED's with different voltage in series, it's a bit like connecting resistors in series with different value, the more current that flows through, the larger the voltage drop over them becomes. I recommend this Circuit Simulator : It don't look at much but has a tons of build in...