A page to collect project documentation and open questions on a range of topics for a December workshop in Madeira.

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## Questions

[questions:madeira]

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![](https://publiclab.org/system/images/photos/000/021/974/large/Screenshot_2017-10-18_at_5.42.41_PM.png)

## Multispectral imaging

The [Infragram project](/infragram) brings together a range of different efforts to make Do-It-Yourself plant health comparisons possible with infrared photography. Vineyards, large farms, and NASA all use near-infrared photography for assessment, usually by mounting expensive sensors on airplanes and satellites. Infrared analysis is used for a variety of things, but most focus on assessing plant health, such as:

* to assess crops and #agricultural practices
* better #soil management (reducing #fertilizer, soil treatments)
* in #wetlands analysis

<a href="/w/infragram#Activities" class="btn btn-default">See related activities</a>

[questions:infragram-challenges]

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[![PC051869.JPG](https://publiclab.org/system/images/photos/000/022/948/large/PC051869.JPG)](https://publiclab.org/system/images/photos/000/022/948/original/PC051869.JPG)



## Spectrometry

The Public Lab [spectrometry project](/spectrometry) is an open source community effort to develop low-cost spectrometers for a range of purposes. Our most recent projects are the [Lego Spectrometer Kit](/lego) and the [Papercraft Spectrometer Kit](/paper-spec).

<a href="/w/lego-spectrometer#Activities" class="btn btn-default">See related activities</a>

[questions:spectrometry-challenge]

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![](https://publiclab.org/system/images/photos/000/022/598/medium/sample_1.jpg)![sample_3.jpg](https://publiclab.org/system/images/photos/000/022/949/medium/sample_3.jpg)

## Microscopes

The [Basic Microscope Kit](/basic-microscope) is an introductory Do-It-Yourself microscope made from affordable and easy to find parts. Our goal is to measure #silica particles in the air, #microplastics, and other things using a simple-to-assemble kit.

<a href="/w/basic-microscope#Activities" class="btn btn-default">See related activities</a>

[questions:basic-microscope-challenge]

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## Hydrogen Sulfide

The [Hydrogen Sulfide Copper Prototyping Kit](/hydrogen-sulfide-copper-pipe) is a new project looking at whether burnishing copper can be used as a means to measure the presence of toxic hydrogen sulfide gas. This is an early prototype which needs a lot of work on initial kit design and testing:

<a href="/w/hydrogen-sulfide#Activities" class="btn btn-default">See related activities</a>

[questions:h2s-copper-pipe-challenge]