The Logic Tester project in allowed you to check the digital data values the Arduino uses to control motors and LEDs. The tester’s two LEDs offer a quick way to see the digital data. In this project, you’ll make an awesome change to the tester by displaying “HIGH (1)” or “LOW (0)” data messages on an LCD. The electronic components to build this device are shown in the Parts List. The Logic Tester with an LCD is shown in Figure 16-1.
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