Arduino Paper Piano

Introduction: Arduino Paper Piano

I made it and improve this project based on paper piano with arduino--

You could also find this original idea in paper piano with arduino-- Arduino Project Hub

The changes I've done to the paper piano above is not only the appearance but also the way that the wires are connected to the breadboard. Using the previous way cause few problems: the wires are too close to each other and they're sensitive, so the sounds won't stop unless you could separate the wires from not touching each other, but this could be tough because how the wires are designed to be put closely. Also, there are few mistakes in the schematic. That's the main reason why I changed these places.


  • Male-to-male jumper wires
  • Breadboard
  • Arduino Uno or Arduino Leonardo
  • Resister 1M ohm
  • Speaker
  • Paper clips
  • Aluminum foil
  • Some cardboard and papers

Step 1: Capacitive Sensing

Capacitive touch sensing is a way of human touch sensing, that requires little or no force to activate. It may be used to sense human touch through more than a quarter of an inch of plastic, wood, ceramic or other insulating material (not any kind of metal though), enabling the sensor to be completely visually concealed.

Step 2: Why Capacitive Touch?

  • Each touch sensor requires only one wire connected to it.
  • Can be concealed under any non-metallic material.
  • Can be easily used in place of a button.
  • Can detect a hand from a few inches away, if required.
  • Very inexpensive.

Step 3: How It Works

The sensor plate and your body forms a capacitor. We know that a capacitor stores charge. The more its capacitance, the more charge it can store.

The capacitance of this capacitive touch sensor depends on how close your hand is to the plate.

Step 4: Schematics

Step 5: Code

Step 6: Process

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