I have an old wacom tablet at home, its really big and I'd like to use it but I've lost the pen for it. It uses pens with passive LC circuitry. The board creats an EM-field (I can see it on my oscilloscope) with which the pen interacts and the board can deduce information from the interaction. I looked up the patent and its basically just a coil parallel to a couple of caps.
Is it possible to make a simple LC-pen that would interact with the board simply by trying without more knowldege about the board and pen?