Hackaday UK Unconference FM Radio Rickroll Badge

My Hackaday UK Unconference badge, that plays a chiptune version of Rick Astley's hit on FM radio

Jenny List

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Description

I had limited time to create an Unconference badge. I came up with this, a Raspberry Pi serving as MP3 player feeding a super-low-power FM TX module. Power for the Pi came from a phone booster pack.

The joke was that it broadcast a chiptune Rickroll, thans to my friend [Matt "Gasman" Westcott].

The unusual bit is the antenna, it's a fractal design to pack an FM-radio broadcast antenna into the small space of a badge. It's made from fence wire, with the top of a pin from a British mains plug as its connector. No rocket science, just take a 1/4 wavelength and a pair of pliers, bend the wire into 4, then bend every straight edge into 4, and keep on doing so until your pliers no longer fit the edges.

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Pi config, a bit still to come.
Jenny List • 09/18/2017 at 23:50 • 0 comments

Adding an audio output to a Pi Zero: https://learn.adafruit.com/introducing-the-raspberry-pi-zero/audio-outputsOtherwise, there are a few more details to come on Raspberry Pi audio, but all the info on starting a command line audio player on loop at startup is very easy to find by Google.