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Smart-E-Touch
The Smart-E-Touch is an intelligent, touch screen-based user
interface design. A Nitron 68HC908QY4 microcontroller controls
and monitors a pair of Motorola e-field sensors. The e-field
sensors, in turn, monitor an XY grid on the PCB for the capacitive
sensing of the touch screen. After the Nitron has translated
a “touch” from the e-field sensor data, it then outputs an
XY coordinate to its RS-232 serial port. A main system controller—a
PC or equivalent controller—then receives this XY coordinate
and can act upon it. The touch screen is built into the circuit
board that houses the controller circuitry. So, the touch
screen is part of the system controller board. The Smart-E-Touch
is a natural replacement for resistive touch screens and custom-made
user interfaces.
Bruce
Pride
U.S.
BrucePride@PridEEmbedded.com
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