Vibratory Clock

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Team Members

Left to right: Brian Lesperance, Daniel Pinkawa, and Jennifer Breger
  • Jennifer Breger - Mechanical Engineering Class of 2009
  • Brian Lesperance - Electrical Engineering Class of 2008
  • Daniel Pinkawa - Mechanical Engineering Class of 2008


We built a horizontal circular platform that is actuated from underneath by three speakers placed in an equilateral triangle. The vibration of the platform causes a small object (e.g., an IC socket or a coin) to act as an hour "hand" on top of the platform. The object slides around the circular platform, impelled by friction forces due to the vibration. By placing the speakers at different phases and amplitudes, we got the objects to move to desired positions. Due to the nodes created by the speaker vibrations, the object will move back to the correct hour if it is moved away. Our project was given to us by Professor Colgate and was based upon the research of Professor Lynch.

Mechanical Design

Electrical Design

Software Design



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