This project uses a simple 555 timer chip and a feedback loop to control a servo-controlled wooden arm. Whenever an object comes close to a photosensor mounted on the end of the arm, it blocks the amount of light detected, which triggers the arm to swat the object away.
We started Escama (Portuguese for “fish scales”) three years ago after seeing the way Brazilian women incorporated used pull-tabs into their crocheting.
A Chumby is a small wi-fi device with a screen that uses your wireless internet connection to grab cool widgets (music, video, news, messages, photos) from the web.