Page 280 - Making PIC Microcontroller Instruments and Controllers

280 BUtlDlllG a slfPlE EIGHI-BUIIO|{ TOUCX DAI{EL

ffiS A smalltouch panelframe with lR emilters and pholo_
transistors in Dlace.

soldered intothetouch panelframe.
effig*i* The components

replace any number of pushbuttons. It can be made relatively weatherpoof easily and has
no mo\'rng pafis. Of couse, the same pdnciples also apply for touch panels placed in liont
of CRTS, and CRTS have the advantage that we can change what is displayed with each
touch.