The code was developed as a part of few days long project in the summer school TESP 2012 Robotics at Tohoku University, Japan. The purpose of the system was to take audio input, either mic or directly from the phone/tablet, analyse sound frequencies and amplitude and provide a haptic feedback using four vibration actuators.

The system was demonstrated by using a simulated drums app on an Android tablet while getting a haptic feedback to your wrists as you play using our unique conductive drumsticks :-) Simple matching of frequency changes gave a realistic effect.

The project was based on Arduino Uno board and it was the first time using Arduino for us. Hardware used:

• Arduino Uno board
• Spectrum Analyzer https://www.sparkfun.com/products/10306
• 4x vibrating actuators
• 2x 2 channel Amplifiers
• Asus Transformer Prime as a drumset

Pins used:

Spectrum Analyser inputs:

• int spectrumReset=5;
• int spectrumStrobe=4;
• int spectrumAnalog=0;

Actuator outputs:

• Pins 9 - 12

Just add the code to the Arduino project and given the correct pin configuration, the program should be working.

Project presentation: http://www.slideshare.net/jmiseikis/tesp-2012-drums-haptic-interface

Hardware setup: