November 24, 2007
Reading for November 27th, are now posted. Enjoy!

October 2, 2007
To upload your thoughtless acts, create a new assignment page like any other lab. You'll see "Thoughtless Acts" listed as one of the assignment options.

May 24, 2008
This site has been archived and is no longer editable. Stay tuned for the next version, coming in the fall!

DC Motor Pencil

Project Members: 
Jill Blue Lin


Didn't change the code. I attached a small piece of pencil lead to the DC motor to create a vibrating pencil. Varying the angle on the pencil varies the quality of its drawing. 


Pencil lead


CD Motor


DC Motor Pencil

DC Motor Pencil - also see attached image


Comments from TAs

Cool idea -- I remember having a vibrating pen when I was a little kid. I spent many hours drawing sketches with wavy lines! Beyond getting the basic mechanism working, it would be interesting to consider the physical form of the pencil. E.g., how could you attach the motor and the pencil lead so that it's intuitive to hold and easy to manipulate? What constraints does the large motor size provide? Can you work with them, or would a smaller motor be better?

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