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

bwlange3 said:
Did you have any luck with this? I have been excited to see what you come up with.
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I think that I've got the software side sorted out. I'm waiting for the first batch of PcB's to arrive, before I can begin testing. If it all works as planned, I'll post the build files and software on the Forum.

Here's a photo of the 10V/5VPWM convertor-

10Vto5V_PWM_zpsec465ae4.png
 
What size wire are people using to hook up power to the LDD-H and running to there led lighting

Mine
computer power cord, cut end off for wall to psu
psu to LDD-Hs 22 awg hook up wire
22 awg from out of LDD to leds with push together but connectors. probally 8 foot run
 
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my LDDs Vin goes directly to my power supply because they're close enough that the wires fit, the Vout I believe I used 22 gauge(I think) thermostat wire... which I'm going to change out soon because I'd like something a little more flexible (stranded wire)
 
I've spent the last couple of days going through this and all I can say is you guys rock. I think my brain is oozing out my ears.

My EE buddy is currently MIA so I'm a bit of a loss to figure all this out solo. I'm eyeing these 20w LEDs - Forward Voltage : 30-34V - Forward Current : 700 MA

I am assuming I can run one of these off a LDD without any issues? My big question is what do I need for a power supply?
 
impure said:
I've spent the last couple of days going through this and all I can say is you guys rock. I think my brain is oozing out my ears.

My EE buddy is currently MIA so I'm a bit of a loss to figure all this out solo. I'm eyeing these 20w LEDs - Forward Voltage : 30-34V - Forward Current : 700 MA

I am assuming I can run one of these off a LDD without any issues? My big question is what do I need for a power supply?
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minimum of 36 volt power supply, but 48volt would work also. power supply should be rated for the number of amps your drawing for your LEDs, so with one 700mA LDD driver you would need a power supply that outputs around 1Amp minimum, but can be more, multiply by number of LDD drivers your using to size your power supply.
 
zachts said:
minimum of 36 volt power supply, but 48volt would work also. power supply should be rated for the number of amps your drawing for your LEDs, so with one 700mA LDD driver you would need a power supply that outputs around 1Amp minimum, but can be more, multiply by number of LDD drivers your using to size your power supply.
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The power supply needs to be sized wattage wise + overhead of the LDD (~5-10%) + some overhead just to have spare, say another 10%. For my setup I am using 52v power supplies and running most of my strings at 30-35v. So even though they are 1000ma I do not need 52v @ 1000ma input. I only need about 52v @650ma input per LDD.
 
I've contacted IteadStudio about 3 times and have not heard back so, if anyone has a 4 x LDD-H board they might want to sell I will pay for it and shipping. Thanks in advance.
 
CrazyEyes said:
I've contacted IteadStudio about 3 times and have not heard back so, if anyone has a 4 x LDD-H board they might want to sell I will pay for it and shipping. Thanks in advance.
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That's strange, I placed an order for rev3.0 of rrasco's design last night but accidentally selected the 10 cm. X 10 cm boards instead of the 5x10. I emailed them once I realized my mistake and had a response within 20 minutes. They cancelled my original order and told me to reorder the correct size. I had a response from them acknowledging that they recieced the gerber files shortly after I sent them. What email address are you sending to?
 
CrazyEyes said:
I've contacted IteadStudio about 3 times and have not heard back so, if anyone has a 4 x LDD-H board they might want to sell I will pay for it and shipping. Thanks in advance.
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They always respond to me too, but after I have sent them money. What are you trying to contact them about? Place the order, send the gerber files, done. They will email you when they receive the files to confirm and when they are sent to the board house.
 
Yes i got email replies very quickly too, 1 week to make the boards and 1 week to ship them to Uk, now just gotta wait for post office to open so can collect them
 
OK, I have another silly question. I'm working on setting up a planted tank and am not sure what my final LED design will end up being. So I would like the option to add and change out LEDs as I need. Can I use O2's 5x LDD board and only use 3 of the LDDs until I can sort out what LEDs will stay? Basically can a 5x board function safely with only 3 LDDs?
 
Yes, you can use anywhere between 1 and 5 LDDs on the board. A board doesn't do anything except simplify wiring (and perhaps add a resistor)
 
thanks, that's what I figured. I'm so electronically inept it's not even funny. I'm really glad I decided to go this route since I can start to learn about something I've always been interested in.
 
Whats the cost to Get these Boards Made And How do we do it :)
And Then What Parts Do you Need to Make them Up What the approx cost To Build :) Just Looking at the options Thanks In Advance :)
 
bigguyuk said:
Whats the cost to Get these Boards Made And How do we do it :)
And Then What Parts Do you Need to Make them Up What the approx cost To Build :) Just Looking at the options Thanks In Advance :)
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If you start at the beginning of the thread and work your way forward it will answer your questions in detail. It does take some reading but the information contained is well worth it.

And another word of advice - dont do any ordering until you've read the whole thread.
 
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