DIYbanter - View Single Post - Making a pen for a digitiser tablet

wrote:

I think the puck is just a receiver maybe with an amplifier in it, and
the board itself generates the field. How does the trust pointer work?

Nope, the trust and calcomp work, like all these devices, by a grid of
wires (pcb lines these days) which pick up a magnetic field from a
small coil in the pointer device. They locate it by the wires picking
up the most signal.
I don't think it could really work the other way around.

Cheers,
Alex