MeanWell LDD-1000H led drivers

[sfsuphysics]

The Reef Keeper ALC is 0-10V. Those little LDD's are pulling that much PWM current you can only put (2) drivers per channel? I have a bunch of the LDD's but no controller yet so I can't measure it.

Simply going by what they say on the website that sells that Typhon, not by what Meanwell says. Granted they don't say that the LDD is compatable, but they don't say it's not (probably old documentation) I'm not sure if the ELN or HLN Meanwell's pull more than the LDD, but again, just going by what it says. That being "max of 2 drivers per channel"

 

[chema]

Anybody knows how much PWM current pull the LDD drivers? I'm using an atmega arduino

Thanks

 

[zachts]

I don't recall on current but I think it was mentioned in the larger LDD thread. Controllers are also covered in some detail there as well.

I also recall that they dim in reverse on the typhon (by defalt, you can re program that). basically they are equivelent to a buck puck.

 

[chema]

Thanks Zachts. I'm asking because I'm trying to dim 11 of them distributed in 4 channels and I have already burnt out an arduino 1..

 

[O2Surplus]

Thanks Zachts. I'm asking because I'm trying to dim 11 of them distributed in 4 channels and I have already burnt out an arduino 1..

Ouch! If that's really the case that too many LDD's can overload the Arduino PWM pins, have you thought about installing an NPN transistor between the Arduino and the LDD's? The transistor could be wired to handle the load, rather than the Aduino.

 

[chema]

Ouch! If that's really the case that too many LDD's can overload the Arduino PWM pins, have you thought about installing an NPN transistor between the Arduino and the LDD's? The transistor could be wired to handle the load, rather than the Aduino.

An overload of the Arduino PWM pins is what I'm afraid that happened. I din't think about the transistor, but sounds good to me. I have a friend who knows much more than me about electronics. I'll let him know about that and see how it can be implemented.

 

[TropTrea]

Some how I'm a little confused here. the data sheet for the LDD-1000H says it is pulse width controled driver. I did not know that Ardunino offered the option of PWM.

The question was how many LED's can runn on these drivers. First off there will be variable dependent upon what LED's your using . Most LED's at 1000ma will vary between 2.8 and 3.4 volts. Acording to the data sheet the total output voltage must be no more than 3 volts less than the input voltage. Soe the total output voltage must be under 45 volts with a 48 volt input. The 45 volts divided between 3.4 would allow you to run 14 LED's with the 2.8 volt LED's you could run 16 LED's on this driver. Please note though I would always run one short than the max to leave room for manufacterer variances and saftey.

 

[megadeth72]

I'm running 5 with 1 per pin, about to add pull down resistors to my board

 

[zachts]

Some how I'm a little confused here. the data sheet for the LDD-1000H says it is pulse width controled driver. I did not know that Ardunino offered the option of PWM.

arduino, the basis of just about every DIY reef controller out there, the Typon among the first, developed right here on reef central!

 

[foglia]

I'm driving 8 LDD driver on 4 separate Arduino PWM channel (2 for each channel) adding a serial 1k Ohm resistor . This configuration work very well !

 

[Screener]

I'd like to know more about running these ldd1000h in parallel to increase the current output. I think there were some posts but I can't find the outcome tests in the chatter clutter.

 

[zachts]

I'd like to know more about running these ldd1000h in parallel to increase the current output. I think there were some posts but I can't find the outcome tests in the chatter clutter.

O2Surplus did some testing initially on the gigantic LDD thread. He got them to work by putting diodes on the output side of the LDD both on the Vout + and the Vout -. just having them on one leg didn't work right. but I think that's all the testing that was done. No word on how it will work over time just that it did work.

 

[mr.wilson]

http://www.reefcentral.com/forums/showpost.php?p=21107980&postcount=644

 

[letoan]

Thanks for the link mr.wilson, I've been looking for this answer for a while now.

If the LDD truly draw max of 5ma and the arduino can push out 40ma, just perfect for me, I'm doing 6 LDD for my royal blue.

 

[CrazyEyes]

I have 4 LDD-700HW drivers. Now the problem is, I'd like to use a Pcb board and that usually requires the H instead of the HW. Has anyone ever seen the Hw up close? I'm trying to figure out if I can unsolder the wires so I can solder it to a Pcb board.

 

[Screener]

Thanks to the link mr Wilson
But the I found this in the same thread a few pages on ---
http://www.reefcentral.com/forums/showpost.php?p=21109219&postcount=656

So I'm going to read more

 

[mr.wilson]

Thanks for reading on Screener

The poster O2Surplus, has given more details over on a freshwater plant forum. He has also designed a PCB.

http://www.reefcentral.com/forums/showpost.php?p=21292453&postcount=1033

http://code.google.com/p/meanwell-ldd-led-driver/

http://www.plantedtank.net/forums/showthread.php?t=243562