Build the NEW Junkbox Universal Keyboard Sustain Pedal - YouTube
DIY Sustain Pedal
3D printed - Sustain Pedal for digital piano - YouTube
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switches - Fixing the wiring on a keyboard sustain pedal - Electrical Engineering Stack Exchange
How To Build A DIY MIDI Sustain Pedal Circuit
3 Pieces Aluminum Piano Keyboard Sustain Pedal Switch Mechanism DIY Damper Foot Golden - Walmart.com