I have recently been learning to play a piece on my electronic keyboard that is greatly enhanced by the use of a sustain pedal (or damper pedal). As it is a Christmassy piece it can't really wait for a cheap sustain pedal from Japan or somewhere to arrive next summer, and music shops are sadly so expensive, so I decided to make my own. After searching the Internet , I found a video on YouTube, but it was not an instructable. So here it is! I thank "fsxelw" for giving me the idea!
Step 1: You Will Need...
A male to male headphone lead thingy... I had one lying around from an amplifier project.
One of these headphone jack things. I had one to connect my headphones to my keyboard.
A keyboard (obviously)
A mobile device with a battery... Phone, iPod ect.... It will also need a headphone socket.
Step 2: The Obvious
Step 3: The Mobile Device
Step 4: The End
Enjoy your new sound!