Wearable Piano Interface

Step 3 Understand the circuit

• Exchange wires for more flexible ones
• Experiment with connections and find out where power, ground, input and outputs are
• Identify components
• Use your notes to analyze the circuit and draw a circuit diagram

Results for Schylling toy piano:

• Power source: 2 x 1.5V battery (see: Fabric Battery Pouch)
• 23 keys using 11 microcontroller connections (different combinations of the first 3 and the last 8)
• One 470 K Ohm resistor (can be exchanged for a variable resistor to manipulate sound output)
• No on/off power switch, but this can be created
• Two connections that go to loudspeaker

Comments

[Zem]

What kind of wire do you use? And where do you get it?