From the most ephemeral thought to the rise and fall of civilizations, every aspect of your life, and indeed the universe, involves energy. Energy has been called the “universal currency”by prolific science author Vaclav Smil, but also “a very subtle concept… very, very difficult to get right” by Noble physicist Richard Feynman. It is precisely this combination of importance and subtlety that motivates the Energy class at ITP. Maybe you fear the existential threat of anthropogenic climate change, or maybe you just want your pcomp projects to work better. Either way, the class will help you understand energy quantitatively and intuitively, and incorporate that knowledge in your projects (and perhaps your life). How? Building on skills introduced in Physical Computing, we will generate and measure electricity in order to see and feel energy in its various forms. We will turn kinetic and solar energy into electrical energy, store that in batteries and capacitors, and use it to power projects. We will develop knowledge useful in a variety of areas, from citizen-science to art installations, and address topics such as climate change and infrastructure access through the lens of energy. Students will build a final project using skills learned in the class. To accommodate pandemic restrictions, students will have the option to do more or less hands-on work or research as their situation allows, and support material such as an annotated supply list will help students tailor material expenses to their interests. Prior Physical Computing or equivalent experience required.