Another possibility is mounting
heavy-duty pushbuttons adjacent to the screen and wiring those pushbuttons in parallel
with the keys on a keypad or keyboard; the application can then present soft
keys??”on-screen options that can be selected by pressing one of the adjacent buttons.
15.3
15.3 Configure X for a Kiosk 221
For applications that require only limited keyboard input, consider using a touchscreen
and presenting the keyboard on-screen when necessary.
Avoid using a touchscreen for password or PIN entries, since it??™s too
easy for someone else to view (or video-record) the password as it
being entered.
System Unit, Power Supply, and Ventilation
Most kiosks have an inner and outer case; the outer case is visible to the user and
takes the form of a vending machine, podium, recessed wall unit, or whatever is
suited to the application. The inner case is usually a standard or rackmount PC chassis.
Because kiosks may run without inspection for weeks or months at a time, it is
wise to select a basic but rugged chassis with a good power supply and extra fans for
the system unit. Easily washed air filters which are oversized (in case they become
partially clogged) will help prolong the life of the unit, and airflow through the outer
case or cabinet of the kiosk should also be carefully planned.
Pages:
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339