mathew 725 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 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.


My DIY Formaldehyde test kit

by mathew 21 days ago | 2 | 731 views | 4

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 formaldehyde


False positives for Formaldehyde testing

by mathew 27 days ago | 2 | 335 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 about 1 month ago | 12 | 502 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 about 1 month ago | 5 | 788 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 about 1 month ago | 0 | 513 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 about 1 month ago | 18 | 743 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 about 1 month ago | 14 | 673 views | 2

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 silica pm open-air


Formaldehyde Testing Kit for Lending

by mathew 2 months ago | 5 | 690 views | 2

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 3 months ago | 7 | 952 views | 2

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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air-quality air dustduino dust


can a surface sheen be collected for oil testing?

by mathew 4 months ago | 1 | 787 views | 2

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 4 months ago | 2 | 843 views | 1

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 4 months ago | 7 | 852 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 4 months ago | 7 | 489 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 4 months ago | 3 | 1,278 views | 3

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 5 months ago | 6 | 946 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 open-water


dealing with patents: Black & Decker and the Thermal Flashlight

by mathew 6 months ago | 6 | 875 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 6 months ago | 3 | 1,225 views | 2

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 6 months ago | 4 | 1,176 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 open-water openwater


CSI: Creek Scene Investigators -public lab tv-

by mathew 8 months ago | 4 | 1,804 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 8 months ago | 11 | 2,767 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 8 months ago | 11 | 1,309 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


a paper spectrometer design

by mathew 9 months ago | 7 | 2,175 views | 3

What I want to do build a spectrometer that doesn't use a conduit box, out of mostly paper and c...

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spectrometer desktop-spectrometer fold-up dsk


notes on setting up a Dustduino

by mathew 9 months ago | 2 | 963 views | 3

What I want to do setup a Dustduino per Matthew @Schoyer's instructions My attempt and results ...

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air-quality dustduino dust silica


Frac Sand in 10 minutes

by mathew 9 months ago | 7 | 1,437 views | 6

photo credit: Crispin Pierce PhD What I want to do I made a 10 minute video introducing what fr...

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air-quality air monitoring dust



shorter spectrometer geometry with two slits?

by mathew 10 months ago | 3 | 1,269 views | 2

What I want to do answer two questions: Can straylight be eliminated in a simple spectrometer se...

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spectrometer oil-testing-kit


Graded oils using UV fluorescence

by mathew 10 months ago | 22 | 1,591 views | 1

What we want to do Me and @Warren are trying to replicate the heavy to light sorting of oils, a...

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spectrometer oil fluorescence spectral-workbench


Replicating the Grading of oils with UV Fluorescence on other cameras pt 1

by mathew 10 months ago | 4 | 979 views | 0

What I want to do replicate the results of my previous note using different other cameras. I wa...

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spectrometer fluorescence oil-testing-kit 405nm


Grading oils with UV fluorescence

by mathew 10 months ago | 5 | 1,141 views | 1

What I want to do I want to be able to grade oils from light to heavy. I'm going to use a means ...

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spectrometer laser fluorescence crude



Laser Pointers and the LIF Literature

by mathew 11 months ago | 1 | 1,589 views | 1

*LIF stands for Laser Induced Fluorescence. What I want to do I want to answer three questions ...

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spectrometer uv laser fluorescence


Fluorescence spectroscopy with the foldup + gelcap

by mathew 11 months ago | 4 | 980 views | 1

What I want to do See bright fluorescence spectra with a fold up. My attempt and results While...

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spectrometer uv fluorescence fold-up