Mar 5, 2010

LED Sensor Piano Keyboard

LED Sensor Piano Keyboard project is for Electronics and ECE branch which utilizes an array of LEDs that work as light sensors to generate a musical tone, simulating a piano keyboard. It also Include the full command code. The basic idea to do this project is to use LEDs as both emitters and sensors. This project uses 63 LED's, 9 for each of the seven natural keys. There is one LED in middle which act as a photo detector when the key was pressed, absorbing light from the other LEDs reflected from the finger. You can also Subscribe to FINAL YEAR PROJECT'S by Email for more such projects and Seminar. All credits goes to Authors.



The LED sensing was controlled by a state machine that updated approximately every millisecond and scanned the entire keypad one button at a time. As this project has only 7 buttons so keypad was scanned in around 16 ms. This routine would then either reinitialize the Karplus-Strong routine for a specific button, or it would change the damping on the string to shut off a button.

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Author:-Cristina Guzman and Joe Vulih

Source:- Cornell University

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