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Audio is a great way to get kids excited about electronics. When I was in the 6th grade, my father helped me build my own high power amplifier using an LM3876 opamp. I remember clear as day the first time I powered up my amplifier circuit and nothing happened. Hmmm... I brought my face closer to my circuit board and suddenly "BANG!!!!" an electrolytic capacitor blew up right in my face and scared the living daylights out of me. I unknowingly connected the power supply capacitor backwards. I soldered in a new capacitor, and then plugged it in again. Like magic, my home-brewed subwoofer was now cranking out serious bass by an amplifier that "I" built. That moment was magical and surreal - I still get goose bumps thinking about it!



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