donblair 82 research notes and 758 wiki edits | Moderator



Joined about 6 years ago



TTL Serial JPEG Cameras + microcontrollers

by donblair about 3 years ago | 7 | 1,262 | 3



Riffle 0.1.1 Debugging

by donblair about 3 years ago | 10 | 2,162 | 1


Conductivity Sensing: Open Questions

by donblair over 3 years ago | 7 | 1,932 | 6


Universal Hardware Registry?

by donblair over 3 years ago | 5 | 805 | 1







Testing a Phant Data Repository on Cloud9

by donblair over 3 years ago | 1 | 1,043 | 2



Turbidity sensor prototype

by donblair over 3 years ago | 7 | 3,364 | 6




Monongahela Monitoring Marathon - Part I

by donblair over 3 years ago | 1 | 1,084 | 1


Suratá Visible -- Part I

by donblair over 3 years ago | 2 | 1,433 | 2


Rubba Stoppaz

by donblair over 3 years ago | 8 | 2,762 | 3


Riffle: sensor board approach

by donblair over 3 years ago | 6 | 2,644 | 3


Riffle Datalogger: quick development snapshot

by donblair over 3 years ago | 1 | 2,308 | 1


Wireless 001

by donblair over 3 years ago | 4 | 2,229 | 1


Dock Test!

by donblair over 3 years ago | 0 | 1,886 | 4


Turbidity 001

by donblair over 3 years ago | 4 | 3,470 | 3


The Riffle: DIY and Open Source

by mlamadrid over 2 years ago | 0 | 266 | 2

Article by [Mathew Lippincott][1] and [Don Blair][2] for [Community Science Forum: Water][3] T...

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Intended Purposes for Different Tools and Techniques

by gretchengehrke over 3 years ago | 7 | 2,123 | 11

(Note: have a better name for this? Please suggest it!) Environmental data can be used fo...

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Ideas on opening "open hardware"

by liz over 3 years ago | 8 | 1,208 | 4

Hey folks, this is a line of thought that needs your input! Legend has it that two LEAFFES...

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SkyShield v2 beta

by cfastie almost 4 years ago | 3 | 2,018 | 0

Above: all the 3D printed parts for five Saturn V Rigs. . The next version of the SkyShie...

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Saturn V and SkyShield beta

by cfastie almost 4 years ago | 3 | 2,595 | 3

Image above: The SkyShield on an Arduino Nano. . At iFARM we [flew the new Saturn V Rig w...

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The Water Hackathon Report

by stevie over 4 years ago | 0 | 2,317 | 0

There were several water events that were held over last week in New Orleans that encompassed...

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How does Riffle compatible with 5V sensors?

Accepted

shanlter asked about over 1 year ago

Answers

answered on Nov 06, 2017 0

answered on Nov 06, 2017 0

Show all 2 answers »

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Comments

Comment Last activity Moderation
"Great question re: whether powering the Feather on the 3V line really does work well ... I don't really know. But: looking at a schematic for one ..." | Read more » over 1 year ago
"Thanks Chris -- this is incredibly useful. So important for folks to have a sense of the trade-offs and considerations when choosing solutions in ..." | Read more » over 1 year ago
"Hi @iamchriskelly -- sorry for the delayed reply ... and wow -- this is amazing work you're doing! Would love to know how your PCB version worked ..." | Read more » over 1 year ago
"Hi @gretchengehrke! Sorry for the much-delayed reply :) and thanks for the comment. I, too, liked this approach -- basically, using the differenc..." | Read more » over 1 year ago
"Hallo! If the hardware is Riffle version 0.1.8, the relevant schematic is here -- and, so far as I can tell, VBAT should simply be the battery inp..." | Read more » over 1 year ago
"Hallo! I haven't had great luck with Digikey shopping carts sticking around, so it might be better to put direct links to parts in e.g. a wiki ......" | Read more » over 2 years ago
"Cool! " | Read more » over 2 years ago
"Yes, exactly! That's what I finally came around to this morning :) That's the proper level of abstraction here; there are various clever schemes f..." | Read more » over 2 years ago
"Update: actually, nevermind :) I've read more about error detection codes, and I'm learning that there might be better / easier ways of implement..." | Read more » over 2 years ago
"This is so fun!. I've been starting to reproduce the Matlab code in a Jupyter notebook, in order to understand the algorithm ... it's still a mess..." | Read more » over 2 years ago
"This is a fantastic and very clear explanation. Thanks so much for all the work and thought that went into this! In the end, did you decide to mo..." | Read more » over 2 years ago
"@rmeister -- WebJack is a lovely piece of work! I connected a thermistor to a Pro Mini, used the voltage divider and capacitor setup recommended a..." | Read more » over 2 years ago
"Hi Rebeccah! Fantastic stuff here. Lots to digest, and I have several thoughts -- but first, quickly: the frequency output of the Coqui requires..." | Read more » over 2 years ago
"This is gorgeous! So cool! (Were you able to use the washer without bumping into any components on the board? Been worried bout whether using th..." | Read more » almost 3 years ago
"Yay, data!! Neat observation about the battery voltage and the temperature. Makes me want to compare the rate of battery voltage drop to the temp..." | Read more » almost 3 years ago
"Bravo!! This is amazing. This makes me wonder what accounts for the rest of that quiescent current draw ... maybe the majority of it is due to th..." | Read more » almost 3 years ago
"This is so fantastic. So neat to see the current spikes with the SD card writes! ANd ... oh, my, what a terribly high sleeping current ... I sho..." | Read more » almost 3 years ago
"Chris, This is such a beautiful project! The lapse rate calculation is so fun to see. Quick reactions: That power switch goof is annoying. I w..." | Read more » almost 3 years ago
"Wow, great work. Sorry that there's so much trouble dealing with drivers for this USB-Serial chip! Re: the capacitive sensor circuit ... do you s..." | Read more » almost 3 years ago
"@ggallant -- Wow, this is fantastic detective work. Does it seem that you were able to resolve the uC resetting issue with the extra cap parallel ..." | Read more » almost 3 years ago
"Hi Chris! This is fantastic research. So many interesting questions coming up already via your testing. Thank you. Riffleman! These rechargeabl..." | Read more » almost 3 years ago
"Ben, Fantastic job on this! Excellent descriptions of the entire system -- the electronics, the probe design, and the calibration procedure. Ver..." | Read more » almost 3 years ago
"@cfastie: Power estimates are next on my list :) Looks like I should be able to switch off power to the camera completely using the microcontrolle..." | Read more » about 3 years ago
"The new firmware has a hibernate function, so you don't need to do this. You just let the mobius turn itself on and off, and let your additional po..." | Read more » about 3 years ago































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