- The paper (or supplementary materials) should include a parts list (with approximate prices) to demonstrate the cost effectiveness of this approach to readers new to the technology.
- It would be nice to connect the A/D converter to some sort of simple resistance-based sensor (e.g., thermocouple). Again, the goal would be to spark creativity in the students by showing them things that connect to real world problems.
- I was also hoping for a final experiment where the changing voltage would be applied to something other than the Raspberry Pi. Maybe some sort of speaker or a fan. Some way for the students to see how their circuit could be used and completely disconnecting it from the digital technology.
- I found a Raspberry Pi GPIO emulator. Although not as good as the real thing, I wonder if something like this could be set up for students and/or instructors to practice on their own computers?
In summary, a good paper that will spark creativity in instructors as well as the students.