liotier @liotier CC BY-SA 24/12/2014 4 4 Turning an old player #piano into a MIDI instrument - #Arduino, custom #PCB, #solenoids valves & #vacuum tubes (no - not those ones) :▻https://medium.com/@hackmancoltaire/adventures-in-piano-building-c3fe5fa0b56b https://d262ilb51hltx0.cloudfront.net/max/1200/1*aBLavf_FVVRi13Dlyl5EVQ.jpeg #player liotier @liotier CC BY-SA