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It was great to see Audrey Armstrong, age 9, successfully complete her first solderless breadboard project at our breadboarding workshop. She built a 555 timer-controlled blinking LED circuit with a photo resistor to control the rate of the blinking. I was impressed. Great job, Audrey! 20120929-185424.jpg

Mark Frauenfelder

Mark Frauenfelder is the editor-in-chief of Make magazine, and the founder of the popular Boing Boing blog.


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  1. [...] young Audrey Armstrong, age 9, who built a timer-controlled blinking LED circuit with a photo resistor to control the rate [...]

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