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mathew 896 research notes and wiki edits | Admin

Co-founder of public lab, balloon and kite nut. mdml.co/ @headfullofair


mathew was awarded the Watchdog Barnstar by amysoyka for their work published in Frac Sand in 10 minutes.


mathew was awarded the Photo Documentation Barnstar by amysoyka for their work published in a paper spectrometer design.


mathew was awarded the Basic Barnstar by Francis for their work published in a paper spectrometer design, pt 2.


mathew was awarded the Video Documentation Barnstar by amysoyka for their work published in CSI: Creek Scene Investigators -public lab tv-.


mathew was awarded the Basic Barnstar by warren for their work published in sensors in soda bottles.


mathew was awarded the Basic Barnstar by liz for their work published in a history of crediting contributions.


mathew was awarded the Empiricism Barnstar by liz for their work published in Mini-Buck vs. the Bubbles.


mathew was awarded the Video Documentation Barnstar by liz for their work published in Borrowing a Formaldehyde Kit, Take 1.


mathew was awarded the Basic Barnstar by warren for their work published in My DIY Formaldehyde test kit.


Riffle conductivity caps and other housing ideas

by mathew 1 day ago | 12 | 144 views | 3

What I want to do Follow up on @Donblair's Riffle housing specification with some tested parts. ...

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arduino water-quality riffle bottle


Passive Particle Monitor Deployments: feedback

by mathew about 1 month ago | 0 | 528 views | 2

What I want to do In October and early November, some first draft prototypes of passive PM monit...

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wisconsin dust silica frac-sand


Aquarium Pump modifications for Durability & Flexibility

by mathew 3 months ago | 0 | 1,133 views | 1

What I want to do Create a version of the modified aquarium pump in the formaldehyde test kit th...

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air-quality air pm formaldehyde


Systematic Imaging of Passive particle monitors on an SEM

by mathew 4 months ago | 2 | 649 views | 1

I did this work with Paul, @Damarquis, Dr. @AmberWise and Dr. Andrew Marselli on the SEM Goals ...

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air-quality dust silica particle-sensing



Deploying Passive Particle Monitors

by mathew 4 months ago | 1 | 882 views | 4

Passive Particle Monitor tests are going out in Wisconsin and Chicago. Here are the first-draft ...

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wisconsin air-quality petcoke dust


Using ImageJ to process passive particle monitor samples

by mathew 5 months ago | 1 | 1,626 views | 3

What I want to do I want to document the manual steps of processing the images of passive partic...

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air-quality petcoke particulates silica


analyzing passive monitors

by mathew 5 months ago | 4 | 2,031 views | 4

Analysis Prep In analyzing passive particle monitors, we’ll collect a glass slide cover with a 6...

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dust silica frac-sand pm


Optical Imaging of Passive Particle Monitors

by mathew 5 months ago | 2 | 1,874 views | 2

This is an attempt to document the steps in a method of imaging for the passive monitor you can m...

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air-quality dust particulates silica



Replicating a Passive Dust Monitor & Method

by mathew 5 months ago | 4 | 1,891 views | 3

Passive dust monitors, where dust lands on a pad or in a container without any pumps, fans, elect...

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sensing wisconsin air-quality silica


My DIY Formaldehyde test kit

by mathew 7 months ago | 4 | 2,660 views | 5

What I want to do Compile under one note the parts, assembly, and calibration of my DIY formalde...

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calibration air-quality air barnstar:basic


False positives for Formaldehyde testing

by mathew 7 months ago | 2 | 1,394 views | 2

What I want to do Understand why used Kitagawa tubes are turning pink in our fridge. We've been ...

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air-quality formaldehyde wherewebreathe wwb


Borrowing a Formaldehyde Kit, Take 1

by mathew 8 months ago | 16 | 2,025 views | 2

What I want to do Mail a DIY Formaldehyde Lending Library Kit out to five people, and have them ...

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air-quality air formaldehyde open-air



Mini-Buck vs. the Bubbles

by mathew 8 months ago | 5 | 2,324 views | 4

What I want to do Compare the $10 stopwatch & bubbles airflow monitoring technique @davidmac...

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air-quality measurement silica barnstar:empiricism


bubble-filled adventures in low-pressure airflow

by mathew 8 months ago | 1 | 1,586 views | 2

What I want to do I want to measure the airflow through low-cost particle sensors. The Dylos, S...

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calibration diy air dustduino


using soap bubbles for pump calibration

by mathew 8 months ago | 18 | 2,358 views | 4

What I want to do I want to see if @davidmack's suggestion that a graduated cylinder with a soap...

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calibration air-quality formaldehyde open-air


Plan for recording Shinyei optical sensors using Open Pipe Kit

by mathew 8 months ago | 14 | 2,123 views | 3

Goal: the goal is to read and save the raw output of a Shinyei PPD42 particle sensor to a local ...

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air-quality dustduino silica frac-sand



Formaldehyde Testing Kit for Lending

by mathew 9 months ago | 5 | 2,064 views | 3

What I Want to Do Building on a conversation that @NShapiro, @Warren, and @DanBeavers and I have...

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air-quality formaldehyde open-air openair


Evaluating low-cost optical dust sensors

by mathew 9 months ago | 13 | 3,046 views | 4

image credit: @donblair What I Want to Do We are in the midst of a boom of low-cost air sensing...

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wisconsin air-quality air dustduino


can a surface sheen be collected for oil testing?

by mathew 10 months ago | 1 | 1,764 views | 4

image by by Cesar Harada CC-BY-NC-SA Can an oil slick be picked up off the surface and concentra...

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spectrometer oil oil-testing oil-testing-kit


Assembling the Oil Testing Kit Cuvette Frame

by mathew 10 months ago | 7 | 2,088 views | 2

This cuvette frame's design notes are here, along with previous versions and other design ideas. ...

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spectrometry laser fluorescence desktop-spectrometer



Designing an Oil Testing Kit Cuvette Frame

by mathew 10 months ago | 7 | 2,027 views | 3

I’ve been working to design an oil testing add-on the the spectrometer 3.0 incorporating the feed...

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laser fluorescence desktop-spectrometer oil-testing-kit


making PDFs from wiki pages

by mathew 11 months ago | 7 | 1,066 views | 0

Sometimes you just need information paper. In my case, I'm formatting wiki pages and research no...

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process curriculum plots2 how-to


a history of crediting contributions

by mathew 11 months ago | 3 | 2,314 views | 4

photo credit @Stevie, Washington University students build camera rigs. Giving proper credit for...

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balloon-mapping spectrometer gmf mapping


sensors in soda bottles

by mathew 12 months ago | 6 | 2,037 views | 2

What I want to do I want to keep electronics dry while wired to underwater sensors. I did a sho...

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housing water-quality water riffle



dealing with patents: Black & Decker and the Thermal Flashlight

by mathew about 1 year ago | 6 | 1,537 views | 4

Update: actually, Black & Decker came up with this idea first and we just hadn't seen the thi...

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thermal-photography thermal-flashlight thermal-camera question:patent


shortlinks: putting contributors directly on a kit

by mathew about 1 year ago | 3 | 2,253 views | 3

What I want to do I want to help users of Public Lab kits understand community research that goe...

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spectrometer community oil spectrometry


sketching a waterproof pop bottle sensor system

by mathew about 1 year ago | 4 | 2,308 views | 0

What I want to do I want to make a way to reliably put sensors through the cap of a PET bottle. ...

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housing water-quality riffle open-water


CSI: Creek Scene Investigators -public lab tv-

by mathew about 1 year ago | 4 | 2,938 views | 2

Public Lab TV starring @Eymund of the Gowanus Conservancy. Eymund explains how to find the chalk ...

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water creek tv openwater



a paper spectrometer design, pt 2

by mathew about 1 year ago | 11 | 4,570 views | 3

What I want to do This is a substantial revision to an earlier design, which integrated a bunch ...

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spectrometer oil oil-spill-toolkit spectrometry


A DIY gas-finding camera?

by mathew about 1 year ago | 11 | 2,564 views | 2

What I want to do Explore whether its possible to make a camera that can see VOCs, like the very...

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infrared camera