I HAVE USED MY Nokia Pen to sketch a dozen different schematics and I intend to use some of them as part of process diagrams with students.
The pen picks up more when it's used slowly and deliberately. I can vary line thickness by carefully tracing over original lines. That's faster than selecting a larger line thickness in the back of the A5 copy book that comes with the pen. I plan to put several things online once I have a small portfolio of work. That should happen rather quickly since using the pen is quite easy
Nokia pen samples by Open Media Programme students.