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Published on Mar 4, 2011
A clap sequence can be recorded, played back, and used to toggle a led. The led i representeing the outlet you want to connect or disconnect in an actual clapper implementation. Only a clap sequence that matches the one recorded will toggle the light switch.
Been on sickleave a couple of days, between the coughing up lungs/slowly defeating the plague or something similar, I've been prgramming a wee computer from TI, MSP430-F2013. It's a prototype for a smart klapper, the only thing lacking a relay capable of switching 220 AC and a microphone + some interfacing components.