Edit: I'm sorry, that EdX course doesn't seem to be the one I was thinking of. The cool website is https://www.tinkercad.com https://www.tinkercad.com though. D

Edit: I'm sorry, that EdX course doesn't seem to be the one I was thinking of. The cool website is https://www.tinkercad.com https://www.tinkercad.com though. Definitely worth poking around and experimenting. There’s a great (very low-level introductory) IoT course from Curtin University on EdX[1] that will teach you the absolute basics of circuitry and get you started building things with arduino. MIT also has almost all of their courses available for free (search “MIT OCW” or “MIT open courseware”) if you’re looking for something more technical, given your physics background. I believe their introductory circuits course for EE/EECS students is 6.002. The EdX course is cool though because it uses a site (I wish I could remember the name) that simulates circuits to let you build things with an arduino right in your browser. [1]https://www.edx.org/course/introduction-to-the-internet-of-things-iot?index=product&queryID=c4b3fb1b74c421339b459e98f5e3b772&position=13 https://www.edx.org/course/introduction-to-the-internet-of-t...