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Library's collection Library's IT development CancelThe using of dot matrix display as an information conveying means has been
widely spread in many fields. Its interesting display can attract others' attentions to
see the information that it conveys.
Dot matrix display standard design does not make the operator possible to
change the data easily, especially when the display is put in the position which is
difficult to reach.
The tools consist of transmitter and receiver. In the transmitter part, the result
of the data which comes from the keypad can be seen in the display, so that the
content can be read, changed, and corrected before being transmitted serially. The
data transmition can be done through power line by using the help of the modulator-demodulator
to the receiver to be displayed in the receiver's display.
The control of the tool uses microcontroller 8031, and it is supported by 8279
interface which handles the control from the keypad matrix series. IC LM 1893 is
used to modulation-demodulation of the serial data transmition from
microcontroller 8031.
The result of the testing shows that serial data transmition between
transmitter system minimum and receiver system minimum can directly work well.
However, the obstacle in the tuning of the modulator-demodulator series causes
serial data transmition through power line cannot be done.