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October 6, 2011 04:33 pm PDT
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/-cTXkxGflHE/an-intro-to-cybernetics-via-the-555-timer-ball-whacker.html
An intro to cybernetics via the 555 timer Ball Whacker
This is a such a fun project. Steve Hobley make a "ball whacker" that uses a simple circuit consisting of a 555 timer chip and a photoresitor to create a feedback loop. When a ball (or a plastic egg) suspended from a string blocks the light source from the photoresistor built into the arm, the [...]
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/-cTXkxGflHE/an-intro-to-cybernetics-via-the-555-timer-ball-whacker.html
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