8-bit MicrocontrollersのトピックDeveloping E-field touch panel to simulate window mouse

Developing E-field touch panel to simulate window mouse

quicksights — Mon, 30 Oct 2006 17:53:40 GMT

Hello guys,

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MC68HC908QY4T, maybe this is obsolete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.

thank you,

mark

Alban — Mon, 30 Oct 2006 18:29:09 GMT

Euh Mark,

Each product has a page with its datasheet...

Data Sheets

ID and Description	Vendor ID	Format	Size K	Rev #	Date Last Modified
MC68HC908QY4 MC68HC908QY4, MC68HC908QT4, MC68HC908QY2, MC68HC908QT2, MC68HC908QY1, MC68HC908QT1 Data Sheet	FREESCALE	pdf	1763	5.0	7/07/2004

Alban

quicksights — Sat, 04 Nov 2006 22:07:00 GMT

oops, missed that one

i was looking for QY4T

seems there is none

probably T means

TSSOP package

thanks anyway