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

jener8tionx said:
Thank you for the replies.



Is there a way to digitally control the output voltage of the LM2596? What i really want is a way to vary the fan's speed based on led intensity.
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Sounds like you are describing a Jarduino controller. It will do exactly what you asked. It is a diy built controller
 
You upload the Jarduino program on a mega, connect your fan and 18B20's to the correct mega pins and it will work. Assuming you have a tft screen so you can see that the program is functioning on your mega.
 
use a external 12v DC walwart for the fans and use the free version of Jarduino on a mega even use it to control turning on and off lights if you want. and only thing invested is cost of the mega and you can use a cheap mail order one
 
Hey rott,...you think he needs a tft screen to set the fan start temp. ect., or I guess you can set/change numbers on the program from your laptop?
 
But if you want to actually control the fan speeds, unless they are PWM fans, the arduino will not vary the fan speed. Without one of O2surplus' SCW boards. Unless I'm missing something?

Tim
 
perkint said:
But if you want to actually control the fan speeds, unless they are PWM fans, the arduino will not vary the fan speed. Without one of O2surplus' SCW boards. Unless I'm missing something?

Tim
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I believe the SCW converts the larger voltage (supplying your drivers/LEDs) down to the 12V needed for fans. The extra circuitry included is a transistor (relay type) circuit that allows a non PWM fan to basically run as a PWM fan (pulsing power supplied to the fan in order to change run speed). One can technically exist without the other, but O2's design is a nice and neat way of combining them into the single LDD driver board.
 
_shorty_ said:
I believe the SCW converts the larger voltage (supplying your drivers/LEDs) down to the 12V needed for fans. The extra circuitry included is a transistor (relay type) circuit that allows a non PWM fan to basically run as a PWM fan (pulsing power supplied to the fan in order to change run speed). One can technically exist without the other, but O2's design is a nice and neat way of combining them into the single LDD driver board.
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You "hit the nail on the head" right there. :beer:
 
If you are doing one of these builds why would you not have pwm fans

Using 02's board will not control a fan by it self just useing the scw with out external help
 
Can anyone recommend a soldering station for smd work I'm looking for one that has soldering pen and hot air digital perfered
 
rott said:
Guess I missed the part about controlling 2 wire fans

02 I can do that on the boards I got from you
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Yes- just feed a 5V PWM signal to the "Enable" pin (it's the middle pin @ the 3 pin fan control header).
It's also possible to "hot wire" the fans to run full speed without a PWM controller, if needed. Simply jumper a wire from the 12V output screw header over to the same fan "Enable" pin (middle pin @ 3 pin fan control header) The fans will then run when ever 48V is supplied to the board.
 
Ok I was thinking I missed a different non-pwm way of controlling the fan that's why I said it need to be acted on by out side help
 
O2 Did you ever post the files for the SCW to LDD board or the 10v to 5v PWM board with the Apex RJ45 on it?

I'm looking to build a couple of units for over my 40B frag tanks and I want to try and fit 6 LDD-H, 2 SCW, and the 10v to 5v PWM all on a 100mm X 100mm board. Do you think it can be done? :spin1::eek1::crazy1:

Thanks a ton for all of your hard work. I wish I would have found this thread when it started! Great work! Krazie:jester:

Have you made any changes to the sktech for the 10v to 5v PWM board? I haven't looked yet but is the 328 limited to 8bit PWM output? Sorry for all the questions. It took me a week at work to read the thread and now I'm ready to build (well maybe when I finish reading your LDD 1500H thread!)
 
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rott said:
Ok I was thinking I missed a different non-pwm way of controlling the fan that's why I said it need to be acted on by out side help
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O2surplus' solution gives you PWM control (effectively) over any fan (2 or 4 pin). I am not aware of an easier way of doing it :confused:

An arduino alone will give you PWM control over PWM fans only. You ask why you would not have PWM fans - for me, at least, that's because you don't seem to be able to get 50mm PWM fans in the UK and I want to replace the standard fans (no space for bigger than 50mm) with speed controlled ones :(

Tim
 
Krazie4Acans said:
O2 Did you ever post the files for the SCW to LDD board or the 10v to 5v PWM board with the Apex RJ45 on it?
I'll post the build files for the SCWtoLDD-H adapter soon. I'm gonna add a noise filter cap to the output to make it complete.
The 10V analog/ 5V PWM convertor files are already in this thread somewhere, so there's your starting point. I just received a bag of RJ45 & RJ12 connectors today and just finished soldering them in to the new version of the PcB. Both versions need to be tested first, to assure that they work correctly, and then I'll post the build files for them. One version is built specially for the APEX controller and the other is meant for the PROFILUX controller.
I've got my fingers crossed.:cool:
I'm looking to build a couple of units for over my 40B frag tanks and I want to try and fit 6 LDD-H, 2 SCW, and the 10v to 5v PWM all on a 100mm X 100mm board. Do you think it can be done? :spin1::eek1::crazy1:

Use both sides of the PcB and you'll have room leftover!

Thanks a ton for all of your hard work. I wish I would have found this thread when it started! Great work! Krazie:jester:
Thanks!

Have you made any changes to the sktech for the 10v to 5v PWM board?
Nope- there's at least 50 convertors out "in the wild" right now & no one has had any complaints about the software's performance.

I haven't looked yet but is the 328 limited to 8bit PWM output?
Yes, but I've seen some pretty novel code that may allow for 10 bit resolution. I'm looking into that as time permits.

Sorry for all the questions. It took me a week at work to read the thread and now I'm ready to build (well maybe when I finish reading your LDD 1500H thread!)
keep an eye on that thread. It's gonna get good after the chips become more widely available again.
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O2Surplus said:
The 10V analog/ 5V PWM convertor files are already in this thread somewhere, so there's your starting point. I just received a bag of RJ45 & RJ12 connectors today and just finished soldering them in to the new version of the PcB. Both versions need to be tested first, to assure that they work correctly, and then I'll post the build files for them. One version is built specially for the APEX controller and the other is meant for the PROFILUX controller.
I've got my fingers crossed.
Click to expand...

Did you check your pinout for the RJ45? 89 posted his as well and your traces are not going to pins 1 and 5 like the apex describes the pinout.

10 bit is a pretty big change from 8 bit. That should smooth out the few areas of dimming where the steps are just barely noticeable.

Thanks again. It's been years since I used eagle but I've used Mutli-sim and altium quite a bit so hopefully it will come back quick. Wish me luck! Krazie:jester:
 
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