jonsnow399
Well-Known Member
Lead is a better high.im freebasing mercury vapor over here
we can do this
Lead is a better high.im freebasing mercury vapor over here
we can do this
preorders now up atI need an update of some sort or I'm not going to make it through the weekend.
Would 700ma be the max current for driving a SOL-SKIN board (all 3 channels) with NO Heatsink
300x300 mm, I really doubt that Mark is selling a 540 diode board for $100.it says below 100 watts doesn't need sinking. im new to LED and don't really understand, but it says those 540pcs run at 113w but the 300 on a QB can run 160w, so i imagine you could run this board higher than its saying or?
also i can't find anywhere if it says, what are the dimensions of each board?
Thats what i was thinking that cant be right.300x300 mm, I really doubt that Mark is selling a 540 diode board for $100.
Those resistors can only prevent a thermal runaway between boards if they are wired in series but not in parallel, right? But if wired in series there is never a risk of a thermal runaway at all. So all what these resistors are doing is protecting the parallel strings of leds on each board making it possible to mix up different voltage bins, right?Current Balanced:
Many mid power led boards take the low cost approach(series/parallel structures) and provide no protection for thermal runaway or current hogging and often create variable light levels from board to board or even string to string, this is often the result of mismatched voltage bins or worse case, partial string fails which result in the strings re sharing the current load across the remaining strings meaning variable light levels and changing thermal dynamics on the board, Well designed heatsinks may account for such possible variations but if not the boards life may be reduced and will impact PPFD.
The Sol-Skin boards have resistive structures that remove this issue by balancing the forward voltage loads. This means if you have 1 or 4 boards in your build each led will be driven exactly the same and any led failure will not result in current sharing.
correct most thermal runaway is parallel string related to uneven vf across leds or even different voltage bins, our design removes that risk@welight
Those resistors can only prevent a thermal runaway between boards if they are wired in series but not in parallel, right? But if wired in series there is never a risk of a thermal runaway at all. So all what these resistors are doing is protecting the parallel strings of leds on each board making it possible to mix up different voltage bins, right?
Far Red seems to be a spectrum required on a limited basis ie emerson effect, our full spectrum version uses leds that run to 840nm in the 5730 footprint so could be a solution or perhaps just a supplemental board can be added, be interested in your thoughts why you think a whole channel for Far Red makes sense?this very interesting to bad you didnt include a 4th channel with far reds (730nm)
any par readings on a 4x4 area?
witch erp drivers do you recommend for this board?