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This thesis A display board with microcontroller by light-emitting diodes, date, time and temperature. With the microcontroller family (Arduino mega). As the processor commands used to control the data transmission to the module of 7-Segment but it to display, using a modular 7-Segment all 16. Target size 85 × 105 cm, tube LED used in display board, all 2 280 tube. Clearly visible. The test results to determine the efficiency of the display board with microcontroller by light-emitting diodes, date, time and temperature, can tell the time. In compliance with international standards. And the temperature will be no more than plus or minus error is 0.811 percent.
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