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Topic: How to connect a LED Cathode (4-wire led) (Read 3479 times) previous topic - next topic

Grumpy_Mike


So my very last question: How did you come up with the 220 ohm resistor?'

It is a standard value that will always give you good results with an LED on 5V on an arduino.

Once you measure the voltage drop across each LED you might want to calculate them more precisely for a given current but don't worry if you don't.

the_julle

Awesome.
Thank you very much for all your help!
Alex.

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