When we think about microcontrollers, we usually think about limitations: less memory, less CPU, fewer resources. AtomVM shows that constrained environments can still be fun, expressive, and surprisingly approachable. This talk is an introduction to AtomVM, the tiny Erlang VM, with a focus on embedded use cases. We will look at what AtomVM is, why it is interesting for Elixir developers, and how to get started building for constrained devices. The talk is aimed at people who have never used AtomVM before, but it should also be interesting for attendees who already know the project and want a clearer picture of how it fits into the embedded space.