DIY COB LED Calculator
- Thread starter bggrass
- Start date
Newest Version gets me Java Exception error. I miss the good old days. Started making lights with KNNA years ago. grab a handful of Osram Dragons glue them to the biggest chunk of AL you could find and Presto "We have Nugs" LOL. Now its a bunch of engineering I need to build a new light LOL
Will my machine restarted twice dings several times and now it works. I neither question fate or the computer Gods.
Will my machine restarted twice dings several times and now it works. I neither question fate or the computer Gods.
Last edited:
mr. Amsterdam
Well-Known Member
Yes i did fill in 50 or 55 oC but it wasn't working, so i thought that i have Tj wrong but it isnt't working in general because we don't come from the US. Where do i need to make adjustments on my computer in my settings so i can make it work?
Gentlemen, Thank you for such a labor saver. In an hour or so I had worked four or five arrays compared costs and came to conclusions. Maybe some of you more experienced guys could give these numbers a quick look.
1.56 sq ft continuous grow popsickle cabinet
(2) CLU 1818 @ 1.05 amps
Total Watts per Sqft 68.59
Par Watts per Sqft 29.49
PPFD 1542.55
10x14 USA Heatsink profile passive
Think that's enough light?
1.56 sq ft continuous grow popsickle cabinet
(2) CLU 1818 @ 1.05 amps
Total Watts per Sqft 68.59
Par Watts per Sqft 29.49
PPFD 1542.55
10x14 USA Heatsink profile passive
Think that's enough light?
first thing i did was set everything to usa english everywhere keyboard and all localisation settings , but i since then returned to my native keyboard and citicalc still works , it seems to be related to the region and format settings i put in under format english united states ( that place where you set the date formats etc like M/d/year or D/M/year etc i am in windows 10 64bit , i am not 100% sure if it works because of this only or if having other keyboards input layouts available in the list helps , but setting all to usa english works here if all else fails . you can revert to your other settings once done with calc.
bgggrass any chance it has to do with the date format month/day/year / day/month/year ? thanks for the tools by the way
bggrass
Well-Known Member
I was asking the same question when I made the calc.... I was told that distance doesn't matter.... If you figure it out, I'll add the modification.
well distance of light source would make the canopy area variable and since its fixed in the calc , distance does not matter light has no where else to go.
having said that , adding a light source distance tab in calc with a variable canopy area would be nice if possible though , would add the possibility of finding out the most area you can use with x amount of cobs
MeGaKiLlErMaN
Well-Known Member
1ft.
Distance does matter with PPFD. At one ft you get 1542ppfd, once you back off a bit it drops. The calc always assumes this length as a set standard.well distance of light source would make the canopy area variable and since its fixed in the calc , distance does not matter light has no where else to go.
having said that , adding a light source distance tab in calc with a variable canopy area would be nice if possible though , would add the possibility of finding out the most area you can use with x amount of cobs
Rahz
Well-Known Member
Nugtorrent
Member
The link to the Calculator download seems to be dead, anyone have an alt?
MeGaKiLlErMaN
Well-Known Member
look at BGGRASS s signature it has active links, dont forget to install java
Nugtorrent
Member
Got it up and running, thanks dude!
Timeattack
Member
Sorry if this has been asked already
Will this be updated for Vero 29 gen 7's or are the V2's too similar in efficiency to need a change?
Will this be updated for Vero 29 gen 7's or are the V2's too similar in efficiency to need a change?
bggrass
Well-Known Member
What are the numbers for gen 7? I've been out of the loop but if someone has the numbers, I'll look into it when I have time
Timeattack
Member
Something like this?
Attachments
bggrass
Well-Known Member
Something like that. The amperages you have are not the standard that are usually used around here, but the idea is the same. Can you simulate that lm/w at 50*C? Can you upload that calculator here?
Timeattack
Member
Here's SupraSPL's spreadsheet that I modified a bit using the values from the Gen 7 data sheet.
Some of the factoring values have been changed to get the lumen #'s somewhat close to the data sheet #'s.
Someone should check my math because I am a complete noob at this stuff, just trying to learn.
Comparing the fV of the data sheet and Supra's spreadsheet seems a little off.
42.4V @4200mA on the Gen 7 Data sheet vs 42V @3600mA on Supra's spreadsheet (assuming he used 29V2 values?)
https://www.dropbox.com/s/ef7lyfaxlidtzji/Vero 29 Gen7 Spreadsheet.xlsx?dl=1
Some of the factoring values have been changed to get the lumen #'s somewhat close to the data sheet #'s.
Someone should check my math because I am a complete noob at this stuff, just trying to learn.
Comparing the fV of the data sheet and Supra's spreadsheet seems a little off.
42.4V @4200mA on the Gen 7 Data sheet vs 42V @3600mA on Supra's spreadsheet (assuming he used 29V2 values?)
https://www.dropbox.com/s/ef7lyfaxlidtzji/Vero 29 Gen7 Spreadsheet.xlsx?dl=1