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Re: Chinese made LED diy

PostPosted: Tue Nov 12, 2013 7:13 pm
by KRavEN
Was thinking the AD5282 would work fine. i2c is pretty easy: gnd, 5v, sda, scl come from the RA i2c bus. Stiffening cap on AD5282 vcc line. Hook up the dim+ and dim- on the drivers to the appropriate resistor and wiper terminals. Then just find or write a new arduino class to control the AD5282.

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 5:39 am
by lnevo
Wow, sounds like a great solution.

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 6:20 am
by lnevo
How would you control multiple fixtures? I'm guessing you'd need a few of those and give each one their own address? Ir would you be able to wire multiple pots to each channel?

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 10:22 am
by Dctrojan
Sacohen wrote:Dctrojan; I just wanted to see how you are liking the light still?

The only thing I noticed about them when I looked at them on Ebay is there is no reds, pretty much just blue, whit and a little green.


Im still liking them they work great . Everything in my tank is growing like crazy. Im still wanting to add a actinic strip of royal blues to the system eventually. I also thought about adding a red or two as well.
I havent been able to do much research on the red leds yet and if I truly would need them.


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Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 10:30 am
by Sacohen
Thanks I was thinking of adding 1 4' strip from Buildmyled.com of their 14000K lighting.

You just have the Meanwell drivers connected to the lights and you are getting dimming control, correct?

I keep see these post from KRavEN that looks like he is doing something much more elaborate.

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 10:51 am
by Dctrojan
Yup mines just wired in right between the wall outlet and 5he fixture. I just removed the old one power supplies and wired the meanwells in. I would take a picture but its a mess and I haven't had a chance to clean it up. The drivers dont dim all the way to 0 only to about 15 before the fixture cuts off. I tend to only run my whites up to 60% throughout the day and the blues are at 100 %

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Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 11:05 am
by Sacohen
Cool. thanks for the info. I'm still leaning towards this setup, just need to get the money together.
Every time I'm able to save some money something "important" comes up and I have to pay a stupid bill or get food for the family.

Jeeze they don't really need to eat 3 times a day every day do they???

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 1:57 pm
by KRavEN
lnevo wrote:How would you control multiple fixtures? I'm guessing you'd need a few of those and give each one their own address? Ir would you be able to wire multiple pots to each channel?

That chip is a dual channel chip. The way my light is wired is I have 3 drivers on one pot and 3 drivers on the other. I could go with 3 of these chips and control all 6 individually but the way the led layout I don't think it's worth it. I'll just replace the 2 manual pots with the dual digital pot.

Yes, multiple fixtures multiple chips with different addresses. The address is set via pins on the chip being pulled high or low.

Re: Chinese made LED diy

PostPosted: Wed Nov 13, 2013 4:54 pm
by lnevo
So this would work to replace any manual dimmer then?

Re: Chinese made LED diy

PostPosted: Thu Nov 14, 2013 6:02 am
by KRavEN
Should. I still need to get one and try it out.