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Hi, i'm making my own midi controller Answered

Hi, i'm making my own midi controller and I want to put some led on each of the controller button. What sort and model do I have use of led and resitors?? Am pretty sure that the resistor is a 220ohm 1/4, 5% tolerance but how many volt the led must be..? verry confuse

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rickharris (author)2011-06-19

The LED voltage and current is an input to the equation to calculate the resistor value.

http://led.linear1.org/1led.wiz

will work it out for you.

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