| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "These look good too, and come with a spectrum datasheet: http://www.ledgroupbuy.com/solderless-true-violet-led-405nm/ " | Read more » | over 8 years ago | |||
| warren | "Powered on one of these, with a dial: http://www.watterott.com/de/Wattuino-Nanite85?x56e76=f63b1cee028854c06b93338f2945a806 " | Read more » | over 8 years ago | |||
| warren | "Here's the big list of UV LEDs below 405 nm " | Read more » | over 8 years ago | |||
| warren | "Crap, those are only in quantities of 400+ or 1000+. I'll keep looking. " | Read more » | over 8 years ago | |||
| warren | "@tonyc @ygstcu - looking at higher powered LEDs, I've found: ~$4.40: http://www.digikey.com/product-detail/en/VLMU3500-385-060/VLMU3500-385-060TR-..." | Read more » | over 8 years ago | |||
| warren | "@ygzstc - pointing you at this note since you've ordered some very bright UV LEDs. Oops, missed your comment mathew - we'll have to try that, thou..." | Read more » | almost 9 years ago | |||
| mathew | "Ok- so styrene cuvettes are dissolved by diesel fuel and several other oils. In the photo below you can see the bottom dissolving into a sticky mes..." | Read more » | over 9 years ago | |||
| jaia | "I love the price on these cuvettes from Carolina Biological -- $29.95 for a pack of 100. http://www.carolina.com/spectrophotometer-accessories/spec..." | Read more » | over 9 years ago | |||
| mathew | "What happens if you unscrew the lens on the laser and put it in front of the LED? can you concentrate the light to make a brighter point? " | Read more » | over 9 years ago | |||
| amysoyka | "Also some tips on the straws. *Straws seal best of you wait until the tongs are hot and then put them in. *To get liquid in them, flip, squeeze, ..." | Read more » | over 9 years ago | |||
| amysoyka | " @warren As far as I can tell, kinda this was done with a cheap UV light - not a high intensity laser LED... " | Read more » | over 9 years ago | |||
| mathew | "Gelatin capsules are super cheap, and gelatin is very transparent. they won't dissolve in oil, I don't think-- but they are water soluble. That wo..." | Read more » | over 9 years ago | |||
| warren | "Just mention it because the pill is filled with liquid, and reminded me of your straws. " | Read more » | over 9 years ago | |||
| warren | "Amy, have you tried shining a laser through those? I had the odd experience today of finding a fish oil pill, and look what happens when you shine ..." | Read more » | over 9 years ago | |||
| mathew | "I love the straws! grabbed a stack myself today. " | Read more » | over 9 years ago | |||
| amysoyka | "Yup. ^_^ " | Read more » | over 9 years ago | |||
| eustatic | "amy is that a plastic straw + curling iron? " | Read more » | over 9 years ago | |||
| amysoyka | " " | Read more » | over 9 years ago | |||
| amysoyka | "Looks fun..icy poles are awesome. I had this same problem a while back. In the end I settled for resealable plastic baggies & plastic straws. " | Read more » | over 9 years ago | |||
| warren | "Check out this post: http://publiclab.org/notes/warren/07-05-2014/oil-testing-spectrometry-workshop-at-fab-10 " | Read more » | almost 10 years ago | |||
| Paquicamus | "That is great. It's just like a double beam spectrophotometer. Any chance to post some results. For example a 10mg sodium nitrate aqueous solution,..." | Read more » | about 10 years ago | |||
| mathew | "Nice! I'm going to go print one tomorrow. " | Read more » | about 10 years ago | |||
| warren | "Wow, amazing progress! I love the photoshoot. Can you upload the sketchup files etc. in the research note as well? " | Read more » | about 10 years ago | |||
| mathew | "wait, shorter answer-- The bandwidth is the same, but the beam will be wider. " | Read more » | about 10 years ago |