I had the need for something like this as well at one time. Decided to ghetto-hack it since it only needed a touch at one point: https://www.youtube.com/watch?

I had the need for something like this as well at one time. Decided to ghetto-hack it since it only needed a touch at one point: https://www.youtube.com/watch?v=Z4b5ym1ZqSo&list=UUm5ytliPWaH2rDPZ5kW1ZJg https://www.youtube.com/watch?v=Z4b5ym1ZqSo&list=UUm5ytliPWa... The headphones around the pen are to ground it, so that the touch registers on the tablet.