Don't worry about the difference in voltages between the two power supplies. Ground (Vin-) is always Zero volts no matter what. Just make a single wire ground connection between the arduino and all 4 PcB's and your PWM dimming should work fine.
Meanwell LDD driver: for those who want to dim to 0 using Arduino
- Thread starter pwreef
- Start date
Don't worry about the difference in voltages between the two power supplies. Ground (Vin-) is always Zero volts no matter what. Just make a single wire ground connection between the arduino and all 4 PcB's and your PWM dimming should work fine.
daplatapus
New member
Awesome, Thanks O2Surplus! Sometimes you know you think you know that answer but you really want confirmation before you hook that sucker up to some power, lol. I just posted this on my local forum but thought you guys might also like some shots of my progress.
Well again another very early morning thanks to the ever so diligent crows and robins, argh.
Oh, well, might as well do something constructive. This is what my office now looks like, lol
And I got everything hooked up and it seems to be running, yaaaaaaay
The Arduino up and running the code:
And a shot of the panel box everything is mounted in temporarily:
I'm still waiting for my amphenol connectors that's why everything is only temporarily connected. I couldn't think of another way to test fire everything at once to make sure it all worked together. I also want to get this thing over my 77 gal and see if it has a positive effect on the coral and algae I just can't seem to kick. I do have MH bulbs that are 8 months old or so and at this point I'm not buying bulbs with this thing so close to operational.
I also have not finished my fan circuitry so right now the fans are not running on my heatsinks so that's next on the priority list.
I also have to fine tune the Arduino code because I have a couple channels used that the original code was using for sump lights and such that I'm not using. So I have to figure that out.
Well again another very early morning thanks to the ever so diligent crows and robins, argh.
Oh, well, might as well do something constructive. This is what my office now looks like, lol
And I got everything hooked up and it seems to be running, yaaaaaaay
The Arduino up and running the code:
And a shot of the panel box everything is mounted in temporarily:
I'm still waiting for my amphenol connectors that's why everything is only temporarily connected. I couldn't think of another way to test fire everything at once to make sure it all worked together. I also want to get this thing over my 77 gal and see if it has a positive effect on the coral and algae I just can't seem to kick. I do have MH bulbs that are 8 months old or so and at this point I'm not buying bulbs with this thing so close to operational.
I also have not finished my fan circuitry so right now the fans are not running on my heatsinks so that's next on the priority list.
I also have to fine tune the Arduino code because I have a couple channels used that the original code was using for sump lights and such that I'm not using. So I have to figure that out.
Very nice- Looks a lot like the "messes" that I create when working on projects like these. I find that there's nothing more satisfying than throwing the power switch for the first time and a project "comes to life" without any smoke or flames. Now if I could just get my wife to see it that way. Lol
daplatapus
New member
HAHA, ya, you should have seen the look on my wife's face when she came into the office this morning to say good morning, 
marspeed
Member
for aluminum spacers i use these guys
http://www.aluminumspacers.com/?gclid=CKDb9q-z9bYCFcLc4AodOkwAOg
http://www.aluminumspacers.com/?gclid=CKDb9q-z9bYCFcLc4AodOkwAOg
O2Surplus,
Thanks for all the updates on PCBs. Lucky I haven't had time to work on my lighting, so I haven't ordered my boards. Loving the new updated boards. Was wondering which pin header the 4 up LDD pulldown jumper board (http://www.reefcentral.com/forums/showpost.php?p=21296379&postcount=1060) are using? 3.5mm or 3.81mm?
Thanks
Thanks for all the updates on PCBs. Lucky I haven't had time to work on my lighting, so I haven't ordered my boards. Loving the new updated boards. Was wondering which pin header the 4 up LDD pulldown jumper board (http://www.reefcentral.com/forums/showpost.php?p=21296379&postcount=1060) are using? 3.5mm or 3.81mm?
Thanks
3.5mm unless something has changed. See post #1066 from O2Surplus.
just a noob
New member
I just got my order in, but it had 11 boards, has this happened to anybody else?
letoan
New member
I got 11 as well.
Thanks for responding, but I think that post regards to the 5 up board.
I am interested in knowing what terminal size is for the 4 up LDD pulldown jumper. http://www.reefcentral.com/forums/showpost.php?p=21296379&postcount=1060
O2Surplus or anyone who has the 4 up LLD pulldown jumper board can respond?
Thanks
That PcB uses a screw header w/ 3.81mm spacing. I had a ton of those 2 position screw headers already in my personal stash, so that's why I chose that spacing.
daplatapus
New member
Got my connectors today for my arduino to LED heatsink today
Thanks for the reply 02Surplus, just perfect cause I have 3.81mm screw headers.
nemosworld
Active member
got my typhon controller from 02surplus
very nice, excellent build quality, just need a nice enclosure to make it perfect.
i tried contacting two Nano reef members who made cases, but no replies.
very nice, excellent build quality, just need a nice enclosure to make it perfect.
i tried contacting two Nano reef members who made cases, but no replies.
got my typhon controller from 02surplus
very nice, excellent build quality, just need a nice enclosure to make it perfect.
i tried contacting two Nano reef members who made cases, but no replies.
Does he sell these all ready built
