Whiteboard Plotter

I like the model where everything is contained in one unit. But it can be a bit more difficult to build. I could also do a balanced model where the motors attach to the whiteboard and the control and power provide counter balance to the marker.

This is a bigger project that will give me exposure to several more advanced tools.

It might be slightly overkill, but doing this with an RasPi Zero could work well. It would be a lot easier to load data onto it.

All In One

The ends of the belt clip to the whiteboard.

The control has 2 steppers and a servo (for the pen). An LCD and buttons. And an SD card. That's a lot of pins.

I could use a Mega to get everything. I could also use two arduinos together, one to drive the motors and one handle IO.