USB LED Light.

The circuit schematic is so simple: Just one resistor and one White LED. I did use a 10,000mcd white LED. It illuminates perfectly the keyboard of my computer. In fact; it is so bright that, I can use it to read. 

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How To Make a Speaker

A homemade speaker using a plastic cup, business card, wire, magnet and some Lego blocks. I built this speaker from scratch;

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