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A tutorial on the basics of using LEDs (light emitting diodes). Polarity, forward voltage and current are discussed. 300 LEDs for $13: http://www.amazon.com/exec/obidos/ASIN/B00UWBJM0Q/afromods-20 500 resistors for $12: http://www.amazon.com/exec/obidos/ASIN/B008MH97I4/afromods-20 Adjustable power supply: https://www.amazon.com/exec/obidos/ASIN ...
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