When was the last time you did something in the embedded sector?
Today, they all come on boards - typically with a USB-port in the least. Look for “ARM Blue Pill” on AliExpress ($1.5).
Here's a picture:
https://user-images.githubusercontent.com/26856618/33531361-173def5e-d841-11e7-8e86-9f3f65a89f52.png