Ever wanted to transfer data via a different means? Sure, we’ve got our usual broadband, 3G internet and such, but what about using your bog standard audio files? Charlie Robinson’s Arduino Cassette Engine allows devices to interpret specially coded audio files as binary data, which can then be stored to a memory card. Of course, when you get down to the gist of it, data is all just 1’ and 0’s, but it’s an interesting idea that you could conceptually record the data into a cassette tape and pass it along to a friend to playback and get the data.