I really like Counting to a Billion by Che-Wei Wang. It uses an Arduino and a speech module to count up to 1 billion, and then it stops. The real question is, how long will it take? Will it even make it? I’m not sure, but it’s a cool experiment.
Counting to a Billion is a device created to fulfill the desire to count. The electronics consists of a microcontroller, a speech module, and a speaker powered by a rechargeable battery. There is no/off switch. The voice begins counting at one, two, three and continues counting up until it reaches one billion at which point in time it will stop.
More about Counting to a Billion by Che-Wei Wang
In the Maker Shed:
Make: Arduino
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