Riffle Beta

This page is under development March 2016. [![agbdunderconstruction7.gif](//i.publiclab.org/system/images/photos/000/014/633/medium/agbdunderconstruction7.gif)](//i.publiclab.org/system/images/photos/000/014/633/original/agbdunderconstruction7.gif) [![betta_fish_avatar_by_theamazingchair.gif](//i.publiclab.org/system/images/photos/000/014/652/medium/betta_fish_avatar_by_theamazingchair.gif)](//i.publiclab.org/system/images/photos/000/014/652/original/betta_fish_avatar_by_theamazingchair.gif) ###Activities **Activity 1:** take a picture of the Riffle [?] * this activity can be done by an individual * YYYY-MM-DD When Riffles will be mailed out * [X hours/days/weeks] How much time you will need to test the Riffle * YYYY-MM-DD When participants need to send pictures back by **Activity 2: ** automate way to trigger camera to snap picture of submerged secci disk. [Don](/people/donblair) will lead development and also act as maintainer in the [Public Lab's open hardware process](/wiki/contributing-to-public-lab-hardware). * this activity can be done by individuals or groups, but requires coordination with other developers according to the development timeline * YYYY-MM-DD public discussion on the approach * YYYY-MM-DD submit contributions by this day * YYYY-MM-DD integration of contributions * YYYY-MM-DD 1.0 release **Other Activities:** other sensor development, lots of low-hanging fruit listed here, have fun! ###Communication * We are going to kick it all off with a Live Call on [Tuesday, March 8] [1pm PT/ 4pm EST] * Email discussion will happen on [plots-waterquality list](https://groups.google.com/group/plots-waterquality), and ... * Research notes will be tagged with "riffle" [subscribe here](https://publiclab.org/tag/riffle) * Certain areas with multiple participants and supporting organizations may host local events ...

Author Comment Last activity Moderation
mathew "It would make sense that the riffle's boot up over draws one of the capacitors. On the Lithium Ion battery issue, can you clarify a little for me?..." | Read more » about 8 years ago
ggallant "Mathew - This is probably the result of a capacitor discharging, C9 is only 0.1uf. I suspect that C14 needs to be much larger (100uf) or add multi..." | Read more » about 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 » about 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 » about 8 years ago
mathew "i'm talking out of my depth here-- I know basic electronics and am not an electrical engineer by any stretch-- but a quick 1.9v dip sounds to me li..." | Read more » about 8 years ago
ggallant " This is a screen shot of the noise spike when turning on power to the SD card. The yellow signal is the CPU D10 line being used as a sync signal...." | Read more » about 8 years ago
ggallant "I have isolated it to the SD card power turn on. There is 100% repeatable noise spike that is 1.3usec long and drops 1.9V below 3.3V. Trying to upl..." | Read more » about 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 » about 8 years ago
mathew "Glad to see it got working, at least somewhat. the trouble is troublesome, those are all brand-new errors for me and definitely sound like issues..." | Read more » about 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 » about 8 years ago