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AUDIOINO, the Arduino with audio bootloader

For a long time I was building little microcontroller circuits which played with leds, make sounds or controlled little robots. I was always looking for a low cost circuit to program my gadgets because I like to give some of them to my friends as a present and I wanted to enable the people to download new programs to this gadgets. Imagine if you build a simple low cost led gadget which produces some light patterns. After a while you would become bored about the patterns the gadget produces. How nice would it be to download some new patterns? To do this, you need a bootloader in the microcontroller. The bootloader described in this article might be used to build a kind of “low cost” Arduino for daily use when you don’t want to spend the money for a real Arduino but to be able to simply reprogram your circuit. I call it Audioino because it can be programmed from the audio line of a PC.”

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