Milling PCBs in the Classroom, Updated Workflow

I'm continuing to teach high schoolers to design their own circuit layouts and mill the boards so they can solder them together and have their own custom hardware to keep. The microcontroller I use for these is usually an ATTiny 85, 84, Adafruit Metro Mini, or Raspberry Pi Pico, all relatively inexpensive. What follows is an easier workflow than I've outlined in previous posts.

Make Gears With Turtle Art

 

You can code gears with Turtle Art! If you have a fabrication machine such as a 3D printer, laser cutter, or CNC machine you can download the SVG file from a Turtle Art design to fabricate in your material of choice. Here is how I made these gears—5 and 10 inch in diameter—with a Fox Alien CNC machine.