Audio Jack Key Board
thingiverse
I print this as a Christmas Gift for my wife's Brother. You only need 5 Audio Jack with 6,35 mm. i bought mine on ebay for 5€ 10 pieces. i use the [Amplify](https://dl.dafont.com/dl/?f=amplify) Font from dafont.com At the back you have a secret place for keys nobody should see. You can use it with strong Magnets Ø 10 mm, height max. 3 mm.
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