My current measurements were here : http://www.reefcentral.com/forums/showpost.php?p=21145416&postcount=738
My view is that you will be safe connecting 7 LDD's to one PWM pin.
Meanwell LDD driver: for those who want to dim to 0 using Arduino
- Thread starter pwreef
- Start date
My current measurements were here : http://www.reefcentral.com/forums/showpost.php?p=21145416&postcount=738
My view is that you will be safe connecting 7 LDD's to one PWM pin.
I stand corrected, you could run a whole lot more than 7 on one channel then.
letoan
New member
Thank you.
So at 0 duty drawn 53uA, we could connect 750+ drivers to a single pin? Since the mega output 40mA.
Yes, all the drivers connected to the same pin will get the same PWM signal.
Hey, I'm glad you like it! Yes, it was made by hand. Most of the surface mount components were soldered using hot air, but the Atmega chip and the rest of the through hole components were done with a conventional soldering iron.
The 6 pin connection is used for programming purposes only. You'll need a FTDI/USB adapter to connect the convertor to your PC. You can find the adapter on FleaBay for a few bucks. Typically they look like this-
One last question O2Surplus on the analog to PWM board: What range of input voltage will it accept to run the board?
Thanks,
Mark
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Here are the files for the MeanWell LDD-H&L Driver. It's a bit larger than 50mm x 100mm size, So make sure to use the 10cm x 10cm size when ordering.
Also one other request. Do you by any chance have a version of this board that has the PWM input resistor on it so it defaults to off?
Thanks,
Mark
For those of you that have lights up and running with the LDD's i would like to ask the following.
With one of the constant current drivers one might have 700ma rated 3 w LEDs and be running them at 50% which would be 350ma to get the desired light level,
Are those of you uising the LDD's finding that for this case you just use a 700ma LDD and then adjust the PWM to 50%?
Is the effect equivalent this way when it comes to how your corals are acting?
Thanks,
Mark
With one of the constant current drivers one might have 700ma rated 3 w LEDs and be running them at 50% which would be 350ma to get the desired light level,
Are those of you uising the LDD's finding that for this case you just use a 700ma LDD and then adjust the PWM to 50%?
Is the effect equivalent this way when it comes to how your corals are acting?
Thanks,
Mark
RRASCO-
I've had a few people asking me ( Via PM ) for a PcB with the "PullDown resistor" as an option. Here's what I came up with-
The PWM pins can be pulled low by installing a jumper, or left to open to " "float high".
If anyone else wants the Gerber files for this version, just let me know and I'll post'em up.
Finally a size question. When ordering this board will it fit on a 5x10 or do you need to use the 10x10 size?
Thanks,
Mark
hello.
I have a question about the drivers Ldd
I found my power switch Meanwell SP-320-48 make allot of noise (when the ven turns).
I have chosen the Mean Well HLG-240-36A now it's also ip65.
My LED fixture is working for half a year now, and no problems.
This morning when I installed the new power switch everything worked normally.
I also had to create a new mounting plate for the new power switch.
After having done this I was able to connect everything.
This went wrong!!
I left everything connected. only the wires (connector) from the arduino to the LDD drivers i had loosened.
When I connected it back I saw a little flash in the plug.
I smelled something strange. when I saw the ldd drivers smoked, I disconnected the plug.
3 of the 6 LDD drivers are damaged, so not all damaged.
On the Arduino (jarduino) i only have a white screen now and a new program i can't upload, So i think it's dameged to
What went wrong, was it a peak? I have no fuse between the Arduino and the ldd drivers.
I can find a explanation what went wrong.
Perhaps there is someone who can help me, so the next time it won't happen me again?
Kind regards
I have a question about the drivers Ldd
I found my power switch Meanwell SP-320-48 make allot of noise (when the ven turns).
I have chosen the Mean Well HLG-240-36A now it's also ip65.
My LED fixture is working for half a year now, and no problems.
This morning when I installed the new power switch everything worked normally.
I also had to create a new mounting plate for the new power switch.
After having done this I was able to connect everything.
This went wrong!!
I left everything connected. only the wires (connector) from the arduino to the LDD drivers i had loosened.
When I connected it back I saw a little flash in the plug.
I smelled something strange. when I saw the ldd drivers smoked, I disconnected the plug.
3 of the 6 LDD drivers are damaged, so not all damaged.
On the Arduino (jarduino) i only have a white screen now and a new program i can't upload, So i think it's dameged to
What went wrong, was it a peak? I have no fuse between the Arduino and the ldd drivers.
I can find a explanation what went wrong.
Perhaps there is someone who can help me, so the next time it won't happen me again?
Kind regards
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your new power supply provides 36V that is the limit or overlimit of yours LDD:
9 ~ 36VDC for LDD-L/LW ; 9~ 32VD C for LDD -LS
Try to reduce the voltage.
Probably you will need new drivers.
SUMMERS
Premium Member
Nira, it would appear that you have crossed wires somewhere or somehow grounded the board with your new mounting plate.
The LDD's (not the ones kapelan linked to) are more than capable of handling 48V in, so your new PSU's voltage is not the issue. Recheck all of your wiring. Make sure you have the VCC and Ground wires correct and test with a meter.
The LDD's (not the ones kapelan linked to) are more than capable of handling 48V in, so your new PSU's voltage is not the issue. Recheck all of your wiring. Make sure you have the VCC and Ground wires correct and test with a meter.
hello.
I have a question about the drivers Ldd
I found my power switch Meanwell SP-320-48 make allot of noise (when the ven turns).
I have chosen the Mean Well HLG-240-36A now it's also ip65.
My LED fixture is working for half a year now, and no problems.
This morning when I installed the new power switch everything worked normally.
I also had to create a new mounting plate for the new power switch.
After having done this I was able to connect everything.
This went wrong!!
I left everything connected. only the wires (connector) from the arduino to the LDD drivers i had loosened.
When I connected it back I saw a little flash in the plug.
I smelled something strange. when I saw the ldd drivers smoked, I disconnected the plug.
3 of the 6 LDD drivers are damaged, so not all damaged.
On the Arduino (jarduino) i only have a white screen now and a new program i can't upload, So i think it's dameged to
What went wrong, was it a peak? I have no fuse between the Arduino and the ldd drivers.
I can find a explanation what went wrong.
Perhaps there is someone who can help me, so the next time it won't happen me again?
Kind regards
Thanks for your response.
I have a Ldd PCB and everything worked fine for half a year.
also with the new power it worked one day.
when I dismounted the connector on the Arduino, and reconnected I saw a spark.
It's not possible to connect the connector the wrong way.
And on the Driver i have a male on the - and a female on the +
Can a voltage spike damage the ldd? and that there are to many amperes flowing through the Arduino that it's damaged? so the consequential is that the Arduino is dameged?
How do you connect Arduino to your power supply?
which pin?
which pin?
I have the http://www.meanwell.com/search/LDD-H/LDD-H-spec.pdf.
So Volt Range = 9 ~ 56VDC.
I've contected it like the manual of Jarduino.
LEDs: Pin 7
LEDs: Pin 8
LEDs: Pin 9
LEDs: Pin 10
LEDs: Pin 11
LEDs: Pin 12
LEDs: Pin 13
Fans: For Hood Lights (PWM) 44
Fans: For Sump Lights (PWM) 45
Fans (ON/OFF): Hood Lights 47
Fans (ON/OFF): Sump Lights 48
The only wires you need to connect from the Jarduino to your drivers (and whatever other circuits your drivers may require) are a ground (GND) pin and the PWM pins for each respective color.
Connector used like one of these http://img.directindustry.com/images_di/photo-mg/rectangular-automotive-connector-35537-2525059.jpg
The Arduino is connected on a 12v adaptor
Sounds like somehow you sent 48V power supply current into the control channel between your Arduino and the LDDs. This fried the LDDs and likely the Arduino PWM outputs. I found that LDDs are not very reliable in general. I did not have fuses in my led strings after just hooking up my lights for the first time. They were not on for even 15 minutes. I heard a pop and whites went out. Result is LDD driver fried and took 2 Luxeons in a string of 10 with it. Had to take the light apart and sent the PCB to Steve's LEDs who promised to reflow new ones on. I heard this happening to other people on another forum as well. EVERYONE ON THIS THREAD PUT FUSES IN ASAP. 
