Sorry, this is all writen in Chinese but I guess you guys still get the idea.
I like it. Still relies on the contact point being conductive. Any idea where I can find an idea for a version which will work with a plastic stylus?
Neat idea..... i am suprised at the accuracy...... now on my list of never-ending list of projects.
My guess is a good 6 or 7 or 8B pencil would be needed..