You can play mp3 files with your arduino!
You only need to watch this video: http://bit.ly/1LS4Iap
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Step 1: Materials
you only need these things:
-shield with sd card slot
Step 2: Subscribe!
If you like this project it might be that you like my other video's. I'm going to make a rfid door lock, wireless wheater station, your ideas,... so if you want to know when this videos are ready you can always subsribe here ***HERE*** btw it's free!