The Arduino Pro Mini is a very minimalistic Arduino board with a small footprint. For this reason, it is an ideal candidate for being used as the target board in a battery-operated system. In this blog post I’ll show you how to minimize power consumption and how to burn a new bootloader that saves flash memory, allows debugging, and fixes an annoying WDT bug.
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Another Piece of the Puzzle
For a recent geocache, which is a tribute to the well-known Tetris game, I wanted people to solve a simple physical puzzle (as shown in the image above). As a reward, they get a code that they can use to open a box. So, what do you have to do to make things work? And how do you make sure that you do not have to change batteries for the next 20 years?
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