Meanwell LDD driver: for those who want to dim to 0 using Arduino

[Promazine]

Pro, see you have 350 700 & 1000's what are you running? Nice pics, keep em coming please.

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I have cool and warm Cree xte's, royal blue Cree xte's, blue Cree xpe's, luxeon rebel cyans and some led group buy 430nm uv's, 405nm uv's, 660nm reds and 495nm turquoise.
Really wanted some LDD500H's, but mouser were out of stock - so gonna run the uv's and turquoise well under max on the 350s
Fingers crossed it should all come together and pack a colourfull punch :beer:

 

[007Bond]

Ya I hope not. I ordered I think monday. The guy has left me two voice mails, wanting to know if I still wanted them. I haven't called him back yet, but I'm going to ask what happened to the 1000 coming in for February. At least they are good in their follow up.

 

[sfsuphysics]

Wow what happened with these? Holy grail realized and everyone jumped on buying them? I'd think they'd be plunked out of a Chinese factory and on a slow boat to the US, but expecting more in April? Yikes!

 

[Kawi9_cf]

Hey guys I am currently in the process of designing my led build. I am wanting to use the LDD-H drivers. I just need a little help. Its a 36 LED build plus four moonlights. I am was thinking I would go with a 48v 5A power supply and have 3-4 700ma drivers running the main LEDs and have a 350 ma driver for the four moonlights. My main question is will it be okay to have 48v going to the 350ma driver with only 4 LEDs in the string. If not what do you reccomend ? Any advice at all on this build would be very helpful this is my first LED build.

Thanks!
-Nick

 

[Eud]

Hey guys I am currently in the process of designing my led build. I am wanting to use the LDD-H drivers. I just need a little help. Its a 36 LED build plus four moonlights. I am was thinking I would go with a 48v 5A power supply and have 3-4 700ma drivers running the main LEDs and have a 350 ma driver for the four moonlights. My main question is will it be okay to have 48v going to the 350ma driver with only 4 LEDs in the string. If not what do you reccomend ? Any advice at all on this build would be very helpful this is my first LED build.

Thanks!
-Nick

The datasheet addresses just this issue. The answer is they're less efficient, but they run fine. Check out the graphs on the last page of

http://www.meanwell.com/search/LDD-H/LDD-H-spec.pdf

You can subtract the efficiency from 1 and multiply that by the voltage and current to get a guess at how much heat they will be dropping.

Looks like 350mA and four 3v LEDs for a total of 12v is 90% efficient when driven by a 48v supply, so 0.1*12v*0.350mA = 0.42 Watts wasted which isn't too bad.

 

[hifters1]

I had placed an order on Tuesday and they called back stating it would be at least March. I may bite the bullet and order from Mouser.

 

[nemosworld]

That sucks! I'm still waiting for mine, as my invoice says that they'll be shipped January 30th. I really hope I don't get the same phone call that you did.

mine was the same, but they did not bill me yet.

 

[Kawi9_cf]

The datasheet addresses just this issue. The answer is they're less efficient, but they run fine. Check out the graphs on the last page of

http://www.meanwell.com/search/LDD-H/LDD-H-spec.pdf

You can subtract the efficiency from 1 and multiply that by the voltage and current to get a guess at how much heat they will be dropping.

Looks like 350mA and four 3v LEDs for a total of 12v is 90% efficient when driven by a 48v supply, so 0.1*12v*0.350mA = 0.42 Watts wasted which isn't too bad.

Thanks for the link Eud I don't know how I overlooked that. I have looked at the data sheet 3 times and I never noticed the 3rd page I'm not sure how I missed it lol.

 

[Kawi9_cf]

Hey guys does anyone have an ldd-h 5-up board I could get. I only need one or two.

 

[tjalfe]

You are using 5 LDD-1000H or 5 LEDs? 5 LDD-1000H is 5A, so for that, I would shoot for about 7-8A power supply. If you are only going to use one LDD-1000H, then the 1.5A would suffice.

Thanks. 1 ldd-1000h and 5 led.

Is there a place in the eu they sell the ldd-1000h other than mouser??

 

[Eud]

Ordered my LDD-1000H and 700H from Mouser today since from the recent posts on this thread it is sounding like they're rapidly turning into unobtainium if PowerGate is now talking about April deliveries, and I can't seem to see them in stock anywhere else.

Only 36 of the 1000H left at Mouser, and they say that they have 90 more on order with a 12 week factory lead time. 12 weeks from what, I don't know, but they're estimating shipping on 2/18.

 

[O2Surplus]

I received my latest batch of Pcb's from ITeadStudio last night. Funny thing was- UPS sent me an email to confirm delivery before ITead even bothered to notify me that they'd shipped LOL.

Here's the 3up Pcb for my RGB leds-

Here it is fully assembled-

Here's my 4up LDD sub Pcb for my "Typhon LED controller"

Here's the same Pcb fully assembled-

And finally, a few shots of the 4up LDD bolted up and connected to my "Typhon"

All in all it works great. I found a few instances where components interfere with each other, "fit wise", but they're no big deal to work around. I'm going to revise the design of the two Pcb's a bit to correct the problems, and post them on this forum for everybody who may want to build one.

 

[rrasco]

Thanks. 1 ldd-1000h and 5 led.

Is there a place in the eu they sell the ldd-1000h other than mouser??

Only EU place I know of it Newark. Not sure if they carry these drivers.

 

[rrasco]

O2! Where did you get those tactile switches with the long buttons? I have been looking for some forever.

 

[O2Surplus]

O2! Where did you get those tactile switches with the long buttons? I have been looking for some forever.

Bought a Bazillion of em' from a seller on Fleabay last year. Had I known you where looking for them, I could have sent them with that shield I gave ya, :headwalls:

 

[nemosworld]

I received my latest batch of Pcb's from ITeadStudio last night. Funny thing was- UPS sent me an email to confirm delivery before ITead even bothered to notify me that they'd shipped LOL.

Here's the 3up Pcb for my RGB leds-

Here it is fully assembled-

Here's my 4up LDD sub Pcb for my "Typhon LED controller"

Here's the same Pcb fully assembled-

And finally, a few shots of the 4up LDD bolted up and connected to my "Typhon"

All in all it works great. I found a few instances where components interfere with each other, "fit wise", but they're no big deal to work around. I'm going to revise the design of the two Pcb's a bit to correct the problems, and post them on this forum for everybody who may want to build one.

Patiently waiting.

 

[Eud]

I received my latest batch of Pcb's from ITeadStudio last night. Funny thing was- UPS sent me an email to confirm delivery before ITead even bothered to notify me that they'd shipped LOL.

Here's the 3up Pcb for my RGB leds-

Here it is fully assembled-

Nice. I'm waiting for my order of 3up boards to arrive from iteadstudio. Sunny emailed to say that they would ship before the holidays coming up, but I didn't pay the extra for UPS, so I think they'll come on the slow boat.

 

[Eud]

BTW, O2Surplus, did you use the 24 pin IC socket adapters to put your LDD drivers on this 3-up board? I didn't do a detailed check of the dimensions of the socket adapters, but now that I see how tight those drivers are, I'm a bit worried.

 

[O2Surplus]

BTW, O2Surplus, did you use the 24 pin IC socket adapters to put your LDD drivers on this 3-up board? I didn't do a detailed check of the dimensions of the socket adapters, but now that I see how tight those drivers are, I'm a bit worried.

Don't worry, the chip holders are under there, along with the 1206 package resistors. It all fits fine.


Here's the board with the LDD's removed.

 

[Eud]

Nice! I see the little 103 on those resistors. I'm really glad you made this board, and I hope my solder turns out as nice. I'm going to sneak it downstairs to the electronics lab here and use their schmancy Metcal soldering stations, so maybe that will work much better than my cruddy old Black and Decker.