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viechdokter "Sorry about the typo. I meant "You could build this from wood or ..." " | Read more » over 8 years ago
viechdokter "Here is what happened: The spectrometer slit was not in the center of the light beam but a little off-center. So when it was closer to the light..." | Read more » over 8 years ago
viechdokter "The last point would be easiest to test: test a no-brand lamp with the same setup and the same power source and do the same stats on the results. " | Read more » over 8 years ago
viechdokter "Hi stoft, I am really impressed by your organised experiment design and statistics approach.Compared with your's my tests are kindergarten stuff......" | Read more » over 8 years ago
viechdokter "Yeah I had a look at stoft's post and was very impressed about his orderly and organised way of doing things. I built my spectrometer 3 weeks ago a..." | Read more » over 8 years ago
viechdokter "Thank you Warren, I will try it out tomorrow. It's bed time here. And I promise not to "abuse" this macro. I had just set it to 6 seconds to get a..." | Read more » over 8 years ago
viechdokter "I already did compare all 10 spectra in the set but I always had to add a single spectrum at a time to get them all compared. What I meant were ch..." | Read more » over 8 years ago
viechdokter "UPDATE 2: it took a few more pix in 4 minute intervals... " | Read more » over 8 years ago
viechdokter "And here is the set. (Sorry I didn't know there was such a possibility. Loads of things I have to learn yet.) Oh, one proposal to the programmers: ..." | Read more » over 8 years ago
viechdokter "Here is a wmv file, it's not so well lined up like the gif but you can see what I mean by stable wavelengths. cfl_reproducibility_animation.wmv " | Read more » over 8 years ago
viechdokter "UPDATE: it did take a second capture, exactly 1 hour later. Have I set the timer wrong? " | Read more » over 8 years ago
viechdokter "Hi Warren, great! That's exactly what I wanted. A time-lapse plug-in for the spectrum capture software. (The bean-cam is nice for videos, Chris, b..." | Read more » over 8 years ago
viechdokter "Yeah, thanx for the tags. I will try to add them to my next notes. But feel free to add any tags you find helpful. " | Read more » over 8 years ago
viechdokter "Sounds like I will have an "illuminating evening" tonight (as long as no model girls come along and tear my clothes off...). I don't have a Solux l..." | Read more » over 8 years ago
viechdokter "Look further down at about 420 nm. The fun starts there. " | Read more » over 8 years ago
viechdokter "No, the cellphone I only use for the nice flower pix... ;-) For the spectra I use the Desktop Spectrometry Kit v3.0 with the JDEPC-OV04 webcam. " | Read more » over 8 years ago
viechdokter "Hi Chris, you are right, the settings are important too. I absolutely forgot to mention them. Here is a (translated) snapshot of the settings: ..." | Read more » over 8 years ago
viechdokter "Okay, now I understand. Thanx. " | Read more » over 8 years ago
viechdokter "Okay, my sunlight did not show much UV because I let it shine through a glass window. Next time I will try without the glass. (Waiting for the nex..." | Read more » over 8 years ago
viechdokter "Thank you Dave. By the way, I had a look at your works and was very impressed. (Not that I would have understood most of it...) But one question ca..." | Read more » over 8 years ago
viechdokter " Tried the substraction and yes, it does show the dips! Cool! " | Read more » over 8 years ago
viechdokter "Hi Warren, thanx again for your input. Next time we get some sun I will try to work with reflective surfaces to reduce overall light intensity to a..." | Read more » over 8 years ago
viechdokter " Here is an overlay of the curves. " | Read more » over 8 years ago