DIY LED Spectrum Analyzer
- Thread starter giulianom
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Met up with LilRobb last night at the ARC Meeting, and we took his "Member Modified" LED Panel through its paces, capturing the spectrum of the LEDs.
Here's the 455nm Royal Blue LEDs:
http://spectralworkbench.org/spectra/show/150">http://spectralworkbench.org/spectra/show/150</a>
Here's the UV LEDs, showing spectrum in the ultraviolet 405-410nm range.
The Pink bars shows the UV section.
[IMG]http://spectralworkbench.org/spectra/show/152">http://spectralworkbench.org/spectra/show/152</a>
And here's the spectrum of all the LEDs turned on:
[IMG]http://spectralworkbench.org/spectra/show/151">http://spectralworkbench.org/spectra/show/151</a>
The line graph isn't showing up on this one, so I'll see if it can be fixed..
Here's the 455nm Royal Blue LEDs:
http://spectralworkbench.org/spectra/show/150">http://spectralworkbench.org/spectra/show/150</a>
Here's the UV LEDs, showing spectrum in the ultraviolet 405-410nm range.
The Pink bars shows the UV section.
[IMG]http://spectralworkbench.org/spectra/show/152">http://spectralworkbench.org/spectra/show/152</a>
And here's the spectrum of all the LEDs turned on:
[IMG]http://spectralworkbench.org/spectra/show/151">http://spectralworkbench.org/spectra/show/151</a>
The line graph isn't showing up on this one, so I'll see if it can be fixed..
Here's a set of all three spectrums overlaid:
http://spectralworkbench.org/sets/show/8">http://spectralworkbench.org/sets/show/8</a>
It's interesting to see the three little humps on the right side - I believe they're the result of reflections or refractions of light on the inside of the box.
http://spectralworkbench.org/sets/show/8">http://spectralworkbench.org/sets/show/8</a>
It's interesting to see the three little humps on the right side - I believe they're the result of reflections or refractions of light on the inside of the box.
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That should do the trick black asporbs color and a non slick / shiny surface should cut down on light reflection
stacy22;749764 wrote: Geeks. Total geeks.
I wondered what you guys were playing with in the corner last night.
Well, we can't all have fancy card printers, now can we...
Personally, I was over in the corner getting blinded by the LEDs...
rdnelson99;749773 wrote: See Stacy, if you had been nice GiulianoM would have built you a card printer long time ago and saved you lots of headaches.
HAH!
Not likely...
Now if you wanted something manufactured on a 3D printer... then we could talk.
(Not that I have a 3D Printer... Yet)
GiulianoM;749774 wrote: HAH!
Not likely...
Now if you wanted something manufactured on a 3D printer... then we could talk.
(Not that I have a 3D Printer... Yet)
Cool, then the clown on my card would actually be swimming in a moving nem right? But how would I keep my pocket from getting wet???? Oh, never mind, that wasn't the card that made my pocket wet. :lol2:
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So, in laymen's terms, how in your opinion do these modified LEDs stack up?
Well, the only thing I can compare it to is the 50W 20,000K LED that I have, so I'll give you my opinion on that...
(And you know what they say about opinions...)
Here's a comparison set:
http://spectralworkbench.org/sets/show/9">http://spectralworkbench.org/sets/show/9</a>
The Black line is my 50W 20,000K LED, and the Red/Orange/Green lines are the types of LEDs on the Member Modified setup.
You can see that both have a peak in the Royal Blue section (450-455nm), however the MM LEDs fall off in the green/red section to the right.
[QUOTE=][B]MorganAtlanta;748381 wrote:[/B] Photosynthesis uses light mostly in the 400-500 nm range and the 600-700 nm range, so this light covers that pretty well. The light in the 500-600 nm range is wasted on the corals, but not on us. It helps makes the light look "white" to our eyes.[/QUOTE]
I would say that the 50W LED covers more of the visible spectrum while still covering most of the range that corals could use, but it still needs some UV support.
The Member Modified LEDs have that additional UV support, but since it doesn't really have a wide spectrum the light would probably look more blue and less white.
Not bad, either way.
Looks like the 20k's could use some more UV, while the MM's could use some red (600-700nm). I have used red's before - I didn't like the visual effect they brought...
The good thing about modular systems is - it's a relatively simple fix.
Giuliano,
if you're up for a challenge - I got pizza, beer and tons of LED chips + a soldering iron - you have the analyzer and laptop...
The good thing about modular systems is - it's a relatively simple fix.
Giuliano,
if you're up for a challenge - I got pizza, beer and tons of LED chips + a soldering iron - you have the analyzer and laptop...
Well now..
Look at what I just found:
50W Ultraviolet LED: $141 (about $2.82 / 1 Watt, or $8.46 / 3 Watt)
http://www.ebay.com/itm/1PC-High-Power-50W-Ultra-Violet-LED-Purple-Light-Lamp-/150766312000">http://www.ebay.com/itm/1PC-High-Power-50W-Ultra-Violet-LED-Purple-Light-Lamp-/150766312000</a>
Another 50W UV LED: [B]$259 :o ($5.18 @ 1W / $15.54 @ 3W)[/B]
[IMG]http://www.ebay.com/itm/50W-Watt-UV-Ultra-Violet-Energy-Save-High-Power-LED-NEW-/200724671382?pt=LH_DefaultDomain_0&hash=item2ebc1f6b96">http://www.ebay.com/itm/50W-Watt-UV-Ultra-Violet-Energy-Save-High-Power-LED-NEW-/200724671382?pt=LH_DefaultDomain_0&hash=item2ebc1f6b96</a>
Substantially more expensive at $140 or $259 (vs $50), but it's the same voltage range and about the same current range as the other LEDs I have...
Since I have 6 LEDs, 3 10,000K and 3 Royal Blue, I might substitute 1 of each for a 50W UV...
And yes Rob, I'd be happy to collaborate...
I have a pretty good Hakko soldering station if that's useful, too.
Available this weekend?
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If enough beer is consumed can we expect a member modified led Polo shirt. I would buy it just because
I can't remember what the exact specs were on the MM LEDs, but if you like the results, you should shoot for the same ratio. If the MM LEDs have 100 LEDs and 4 of them are UV, then I would shoot for about 4% of your total wattage to be UV.
Example: Giuliano's 50w chips x 6 = 300w x 4% = 12 So that would equate to maybe 4 3W UV chips.
Again, I don't remember the specs on the MM LEDs, so the numbers above are probably wrong, but I think the idea has some merit.
Example: Giuliano's 50w chips x 6 = 300w x 4% = 12 So that would equate to maybe 4 3W UV chips.
Again, I don't remember the specs on the MM LEDs, so the numbers above are probably wrong, but I think the idea has some merit.
