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The Security Fest Piano CTF Badge

PCB Layout LED Placement
To play the CTF and unlock the airship lights, desolder capacitors C1 & C2 and solder new 22pf capacitors at the same spot in SMD package. Then solder all the SMD LEDs of your colour of choice at D9, D10, D11, D12, and D13. Then also solder the SMD resistors at R8, R9, R10, R11, R12.
Serial monitor settings: Both NL & CR with 115200 baud.
To play to piano, stick a mini speaker on the backside and solder its leads at LS1.