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Mattador commented on Potentiostat Notes 5: How to make low cost electrodes.

Hi. I am very impressed as well. I wonder if you ever tried to use a gelled electrolyte in order ...

10 comments » almost 3 years ago

Mattador commented on Potentiostat Notes 5: How to make low cost electrodes.

Hi. I am very impressed as well! I wonder if you ever tried to use a gelled KCl electrolyte in or...

10 comments » almost 3 years ago

donblair commented on Power to the SkyShield

Ah, might be fun to look into adjustable ones too, yeah ... these seem to be so cheap because the...

5 comments » almost 3 years ago

cfastie commented on Power to the SkyShield

Yikes, I hadn't seen the pre-built boost converter corner of ebay. That could be the source of al...

5 comments » almost 3 years ago

tomtobback New Contributor commented on why PM10count relates to P2 rather than P1?

hi @guolivar, thanks for the suggestions, i had a look at the ODIN and PACMAN and see that you us...

4 comments » almost 3 years ago

donblair commented on Power to the SkyShield

Seems like the cheapest boost option might be to find a pre-built boost circuit on ebay? http://...

5 comments » almost 3 years ago

patcoyle commented on Riffle Water Bottle Enclosure: rubber stopper w/hole + silicone sealant: > 8 weeks!

Nice results, real example – 8 weeks is non trivial.

6 comments » almost 3 years ago

cfastie commented on Turbidity sensor prototype

This looks very promising. There are a couple of controls that might add a lot to the interpreta...

7 comments » almost 3 years ago

mathew commented on Oil testing kit: Assembly + Initial Calibration

thanks for all the assembly notes. One note on the attenuator-- there are registration marks on t...

5 comments » almost 3 years ago

mathew commented on Turbidity sensor prototype

real clever thinking!

7 comments » almost 3 years ago

Cindy_ExCites commented on Oil testing kit Beta programme - Calibration notes

Ah, yes, that makes a lot of sense, thank you Ethan! I used the part which seemed to have the lea...

6 comments » almost 3 years ago

ethanbass commented on Oil testing kit Beta programme - Calibration notes

Hi, in regards to your question about the placement of the DVD fragment, I think the idea is to a...

6 comments » almost 3 years ago

guolivar New Contributor commented on why PM10count relates to P2 rather than P1?

Hi there @tomtobback ! Just to clarify ... I'm in no way associated with the DustDuino team ... ...

4 comments » almost 3 years ago

kgradow1 commented on Flame testing metal salts

Listed!

2 comments » almost 3 years ago

tomtobback New Contributor commented on why PM10count relates to P2 rather than P1?

hi @guolivar, thanks a lot for the feedback, much appreciated. i understand that this is a practi...

4 comments » almost 3 years ago

mathew commented on Systematic Imaging of Passive particle monitors on an SEM

excellent suggestion, thanks for pulling that up! On a brief review, it confirms our experience ...

2 comments » almost 3 years ago

mathew commented on Fluorescence spectroscopy with the foldup + gelcap

that is a great idea! HPMC, or hypromellose looks promising. It looks like pullulan is used as a...

6 comments » almost 3 years ago

brandta5 commented on Spectroscopic Studies of Beer

I have my kit set up. Where do I put the sample and where do I put my light source?

2 comments » almost 3 years ago

mathew commented on Deploying Passive Particle Monitors

8.5"x11" PDF of this page for printing: _Deploying_Passive_Particle_Monitors-full.pdf PDF made...

5 comments » almost 3 years ago

ethanbass commented on Fluorescence spectroscopy with the foldup + gelcap

How about using vegetarian capsules? This kind is made out of hydroxypropyl methylcellulose (or H...

6 comments » almost 3 years ago

acenchase commented on Systematic Imaging of Passive particle monitors on an SEM

This is very interesting. May I suggest checking out the guide published by NIST which has some ...

2 comments » almost 3 years ago

ethanbass commented on Oil testing kit: Assembly + Initial Calibration

Cool. I can't figure out how to use version 2 to capture spectra. Maybe i am not looking in the r...

5 comments » almost 3 years ago

cfastie commented on Question: Determining Plant-Health

Kiran, The graph is a histogram which can be made in free programs like GIMP, IrfanView, or Fiji...

26 comments » almost 3 years ago

tonyc commented on Testing both spectrometer 3.0 and OTK - assembly Beta program

Very good summary and really good ideas for revisions. The concern about not only humidity but al...

2 comments » almost 3 years ago

warren commented on Testing both spectrometer 3.0 and OTK - assembly Beta program

Regarding humidity, we've talked about offering an upgrade with a sheet-plastic material, die-cut...

2 comments » almost 3 years ago

mathew commented on analyzing passive monitors

@Damarquis has notes on using ImageJ in windows and on thresholding: http://publiclab.org/notes/D...

8 comments » almost 3 years ago

tomtobback New Contributor commented on DustDuino Sketches

Hi @Willie, thanks a lot for sharing your excellent work. I used your example sketch for my Dustd...

1 comments » almost 3 years ago

patcoyle commented on Uncontrolled reentry

Great report of the incident and crash performance of the rig, also beautiful imagery.

3 comments » almost 3 years ago

cfastie commented on Oil testing kit: Assembly + Initial Calibration

Hi Ethan, Your CFL spectra look really good. It's not that common to resolve both of those green...

5 comments » almost 3 years ago

eymund commented on Water quality testing with a robot in the Gowanus Canal

Christopher Swain, the first person to swim the entire length of the Gowanus Canal in over a cent...

6 comments » about 3 years ago

Kite Balloon of R.H. Upson

by mathew over 6 years ago | 0 | | 2

barnstars

by liz over 6 years ago | 0 | | 0

Almost synchronous shutters

by cfastie over 6 years ago | 0 | | 0

Balloon kit tips

by natevw over 6 years ago | 1 | | 2

iPhone intervalometer app geotags photos

by patcoyle over 6 years ago | 0 | | 0

Making a small hamsterball

by bha over 6 years ago | 0 | | 0

Bohemia Spillway kite photos

by eustatic over 6 years ago | 5 | | 0

Davis Square balloon photos

by warren over 6 years ago | 1 | | 0

Discussions in Davis, CA

by mathew over 6 years ago | 0 | | 0

Working auto-triggering for dual cameras

by warren over 6 years ago | 1 | | 2

SpeakCityHeights balloon mapping on YouTube

by warren over 6 years ago | 0 | | 2

Grassroots Mapping Tshirts

by warren over 6 years ago | 1 | | 2

Possible portable spectrometer light sources

by warren over 6 years ago | 0 | | 2

Summary of Lionel Milberger’s Copper Test

by megan over 6 years ago | 0 | | 0

Container Testing for Photopaper Test Strips #1

by megan over 6 years ago | 0 | | 0

Container Testing for Photopaper Test Strips #2

by megan over 6 years ago | 2 | | 0

H2S Experimental Set: Draft 1

by Sara over 6 years ago | 0 | | 0

Planning for Public Lab H2S screen Experiments

by Sara over 6 years ago | 0 | | 0

A495 filter swapping

by warren over 6 years ago | 5 | | 0

Mobile E coli detector created for cell phones by UCLA researchers

by joywager New Contributor over 6 years ago | 1 | | 0

Stewart Long at WhereCamp 4-1-12

by patcoyle over 6 years ago | 0 | | 2

Leonard field- steadying the camera

by Leonard New Contributor over 6 years ago | 0 | | 2

3-camera housing photos and test KAP session

by patcoyle over 6 years ago | 2 | | 2

Procedure for Fixing H2S photographic paper strips

by Sara over 6 years ago | 0 | | 0

Making Glycerol Solution for H2S film Assay

by Sara over 6 years ago | 0 | | 1




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