2011年4月16日 星期六

LED research

Got 2 common size 3mm and 5mm





different require differet voltage and so different resistors.

and they need different current or they wont be bright enougth.

I need to becareful about the choice of resistors so i wont burnt the leds.



some LED resistor caululator websites






they help me to know more about resistors needed

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