donblair 82 research notes and 760 wiki edits | Joined over 6 years ago | Moderator





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"Oh. Heh. I sort of forgot that we have datalogging capability on the Riffle board now:) Let me tally up what it'd cost to have it in a minimalist ..." | Read more » about 5 years ago
"Yep, I think so. The Digispark is only $9, I think, because it uses the ATTiny processor, which is super cheap, and uses a really tiny board. It ..." | Read more » about 5 years ago
"Hah! -- $15! Sigh ... $5 would be even better, no? And it should have wifi too, right? :) The basic version of an OpenLux + dust sensor with reco..." | Read more » about 5 years ago
"Ah, great points. It's true that having immediate, "here's how many particles your device registered in the last 30 seconds" data might not be so ..." | Read more » about 5 years ago
"Follow-up -- there's some nice info on IR photodiodes (at least the sort that are in a typical IR remote), here -- including a link to a datasheet...." | Read more » about 5 years ago
"Yay! Yeah, I puzzled a bit over the best geometry of 'emitters and receivers' to use on the device. I have two photodiodes on the board, one of w..." | Read more » about 5 years ago
"Hi Folks! Great comment thread here. Just following up on Schroyer's lead: the github code had a nice link, in a commented section, to a useful ..." | Read more » about 5 years ago
"I wonder how reliable these test strips are for lead; I've heard that some of the less expensive colorimetric techniques like this are pretty unrel..." | Read more » over 5 years ago
"And here's a nice way of doing color mixing using a ping pong ball as a diffuser: https://teachers.web.cern.ch/teachers/archiv/hst2005/part_sessio..." | Read more » over 5 years ago
"Cversek -- wow, thank you!!! What a useful collection of info. Your note convinced Ben to add a dual op-amp to buffer the conductivity output, and..." | Read more » over 5 years ago
"Mathew -- AIR HOGS! Just watched the video -- WHUUUT!! We've got to do this! That's so much fun! We could be sampling the entire room remotely!..." | Read more » over 5 years ago
"Just noticed -- in that last plot, it looks like the 'falling times' (top curve) start 'slumping', whilie the 'rising times' (bottom curve) seem re..." | Read more » over 5 years ago
"Update: check out our new conductivity results in this research note -- looks like corrosion was, indeed, the culprit (thanks, Mathew and umanaged,..." | Read more » over 5 years ago
"Hi unmanaged -- it'd be great to have you as a beta tester! We're going to be ordering a new round of prototypes very soon, and we're hoping to ha..." | Read more » over 5 years ago
"And, as per our discussion elsewhere today, maybe we also want this material to go in a 'wiki' ... if you get a chance, Catherine, maybe you can d..." | Read more » over 5 years ago
"Could we please make this infomercial video? Please. Pleeeaaase. " | Read more » over 5 years ago
"Yay! " | Read more » over 5 years ago
"Mathew -- I have never been so eager to follow a missing link -- where's the wall-climbing remote control toy car?! :) Wait a minute -- are you su..." | Read more » over 5 years ago
"what about just using a 1/8" mini jack, one of the "three band" ones with a mic line too, as is now standard on phone headsets? Brilliant idea! S..." | Read more » over 5 years ago
"This is fantastic! I didn't know there were Lego parts that did that sort of height adjustment thing :) Your results are really important -- so n..." | Read more » over 5 years ago
"Hi Chris, Wow, so much good info / thinking here. Starting to dig into PeeBee's suggestions -- eager to see if I can make sense of them too -- he..." | Read more » over 5 years ago
"Thanks, Mat! Great point re: the type of metal being used. The earlier screws weren't stainless, I don't think, (I think Ben just found them lyin..." | Read more » over 5 years ago
"Ah, this will be a great thing! Leveraging the widely-available Vernier probes with open hardware will be a fantastic advance. Would it be possibl..." | Read more » over 5 years ago
"I'd be completely satisfied with 'troubled visionary'. On a more serious note: these students are super clever, interested in radio controlled car..." | Read more » over 5 years ago

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