A laser system is used to determine if someone is walking towards the escalator. When the laser is broken, the escalator turns on.
panic on the streets of...
365 project: started June 9th, 2008, ended June 9th, 2009
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
365 project: started June 9th, 2008, ended June 9th, 2009
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
Posted 2 years ago on February 20 2010
