Diy FOTOP grow board 280x900x2.0mm (L29.52"xW9.18")

Moflow

Moflow

Well-Known Member
zypheruk said:
@Moflow did you order heatsinks from same place. Im tempted to order 2 kits FOTOP-320H-1 but seems strange they list that kit with only 1 heatsink, unless im missing something.
What you think, im in no rush as im just starting week 3 flower in the cab.
https://www.alibaba.com/product-detail/Quantum-boards-800-312-Samsung-lm561C_60752158462.html?spm=a2700.8592591.0.0.603d10a92mR12j
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I just went with 2 boards, no heatsinks.
I wanna see how hard they can be run before they need sinks.
I ran one yesterday and got it to 377 watts on that driver.
The Par reading was 1500 in middle at 12 inches.
I had it down to 14.3 watts min as well.
Looks good so far
 
V

Viceman666

Well-Known Member
knight mare said:
The lm561b+ is only 10 L/W less than an lm561c if driven at the mA so still a good chip.
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once again it also depends which BIN they used.. we use to compare best bin LM561B+ with S6 "C" but only god knows which Bin they used on the B+.. They lie on you on which chip they used, could have used a lower bin on the B+ and results could be much worst than 10l/w.. but that's the risk of ordering from china.. Can't wait to get more PAR reading from it.. I'd think 3 in a 4x4 run at let say 220-250w each could work but that would fill 3 feet by 3 feet of pcb board.. not sure it's the best idea.. but happy to see other trying new things I'm sure it will grow good
 
Rocket Soul

Rocket Soul

Well-Known Member
Viceman666 said:
once again it also depends which BIN they used.. we use to compare best bin LM561B+ with S6 "C" but only god knows which Bin they used on the B+.. They lie on you on which chip they used, could have used a lower bin on the B+ and results could be much worst than 10l/w.. but that's the risk of ordering from china.. Can't wait to get more PAR reading from it.. I'd think 3 in a 4x4 run at let say 220-250w each could work but that would fill 3 feet by 3 feet of pcb board.. not sure it's the best idea.. but happy to see other trying new things I'm sure it will grow good
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When the diodes are so spaced out as on this board, so you almost cover the whole cannopy with board then the difference between B+ and C will be neglible; you just hang the light a little bit lower for same ppfd at cannopy.
 
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bdigi

Member
I'm not familiar with PAR values, but what was the light output with the original driver? Do you have in lumens? I'm running a 600w HPS right now. I'd like to run these but I wouldn't upgrade the drivers immediately so I'm wondering what the difference is. Also, did they come with instructions to install? How challenging for a newbie?
 
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