Have you ever used an Arduino Mega 2560 (or a similar board) and, at some point in the development process, experienced the LED mysteriously stopping to blink, garbled text being printed, or funny artifacts appearing in pictures? And all that without any apparent reason or any error or warning message? If you want to know what is behind it and how to solve this problem, read on.
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Connecting the Dots
If you want to drive a 5×7 dot matrix display directly from your MCU, I have the right Arduino library for you. Flexible, easy to use, supporting low power operation, and a low memory footprint: DotMatrix5x7.
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