| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| pdhixenbaugh | "How did you make the figures you used in this research note? They are really well done. " | Read more » | about 8 years ago | |||
| mathew | "That's a good point about the instructions. if they were teased out into the different rig designs and each set of instructions stuck to one desig..." | Read more » | about 8 years ago | |||
| cfastie | "Maybe if I designate one type (1/4" ID) for use with the dowels and the other (5/16" ID) for use with the tubing that would be easier to follow? Wh..." | Read more » | about 8 years ago | |||
| mathew | "most of the parts in the kit are duplicates, as are most of the assembly tasks. Do you think more careful bagging of the tube clamps would help? I..." | Read more » | about 8 years ago | |||
| mathew | "Great notes, Chris! Thanks for the specific instruction and design feedback. I'm going to have to dig in to some of these in more depth. I love the..." | Read more » | about 8 years ago | |||
| ranon | "This is awesome, Chris! Thanks for the great feedback! It seems I missed the nylon washers for the vinyl tube clamp for the silly putty mechanism...." | Read more » | about 8 years ago | |||
| liz | "This is amazing documentation Chris!!!! " | Read more » | about 8 years ago | |||
| ggallant | "D5 appears to connect the INT/SQW on the RTC to PD5 on the CPU. I would be very interested in how one uses the feature. I'm assuming that it requir..." | Read more » | over 8 years ago | |||
| mathew | "The RTC can be set to shutdown and wake the AT328P, it just uses another pin that could be used for a sensor. @donblair left an exposed pin availa..." | Read more » | over 8 years ago | |||
| ggallant | "Chris, I really don't know the actual time but assuming 800usec (nice for the math) to sleep and wake up it would be 800 / 8,000,000 or 0.01% whi..." | Read more » | over 8 years ago | |||
| cfastie | "George that's a good point. Although the real time clock is running all the time, it is not smart enough to do something as complicated as setting ..." | Read more » | over 8 years ago | |||
| ggallant | "I think 8 seconds is the "maximum" interval with a 16MHz crystal. You wake up every 8 seconds and can go back to sleep if there is no work to be do..." | Read more » | over 8 years ago | |||
| cfastie | "Don thinks that eight seconds might be the minimum interval during which the system can be put into deep sleep. So all the sleep stuff happens in m..." | Read more » | over 8 years ago | |||
| ddileona | "Cool! One question: I thought I read in the riffle documentation that you could only log in multiples of 8 seconds. That seemed liked a weird mult..." | Read more » | over 8 years ago | |||
| cfastie | "Hi Gretchen, I also wondered whether the change in logging frequency was caused by the Riffle dropping below 0°C. There is more about that possibi..." | Read more » | over 8 years ago | |||
| gretchengehrke | "Interesting! At first I was wondering if the change in time-step occurred after the Riffle reached 0 deg-C, but then when I looked at your data tab..." | Read more » | over 8 years ago | |||
| donblair | "Hi Chris! This is fantastic research. So many interesting questions coming up already via your testing. Thank you. Riffleman! These rechargeabl..." | Read more » | over 8 years ago | |||
| mathew | "I'm wondering if it just has to do with the power switch setting. it should be on "USB/Lith" for programming. " | Read more » | over 8 years ago | |||
| mathew | "I wonder about the erratic battery readings. fascinating. Chris-- which sensors do you want to attach? perhaps we can find an arduino tutorial th..." | Read more » | over 8 years ago | |||
| straylight | "thanks ygzstc, that makes sense. I think that the approximation that relative intensity measured from the scope can be used in place of the log rel..." | Read more » | over 8 years ago | |||
| ygzstc | "Yes the Beer-Lambert Law is based on -log(I/Io) but it's applicable for a single wavelength value. (https://en.wikipedia.org/wiki/Beer%E2%80%93Lamb..." | Read more » | over 8 years ago | |||
| warren | "It's odd -- I see the graphs. Straylight, can you contact web@publiclab.org so we can figure out what's going on there? " | Read more » | over 8 years ago | |||
| straylight | "Thanks for the question. My apologies that all of the graphs appear to have vanished (they have for me). Not sure why, maybe a hosting issue. Anyw..." | Read more » | over 8 years ago | |||
| anjohn12 | "Quick question, I'm trying to do something similar for a school project. Shouldn't the absorbance of the sample be the negative log of the percent ..." | Read more » | over 8 years ago |