Im helping out my sister's group develop a touch panel similar to "SMART BOARD"
and simulate window cursor functions
Initial prototype ill develop a small one the size of a serving tray, but will develop it
to about 3ftx4ft
There are several schematics but this is my reference the grid design by mr bruce pride
2 e-field chips(X and Y)
however i couldnt find any solid datasheet pertaining to the microcontroller used
MC68HC908QY4T, maybe this is obsolete
so we were referred to MC68HC908QB8, which has lots of reference . at first
I thought ABCD pins of e-field are analog pins. creating lots of problems because
weve already requested for the samples and i ran out of A/D pins in my initial design
good thing i was wrong
First stage of development I think i can handle it. But if i enlarge the panel board to
3ftx4ft. i have no idea what's the best method to approach this. If you guys have
some suggestions ill gladly appreciate it.