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OK, say you power it with 5V, then resistor needed (for LED U=2V, I=0.02A) is (5-2)/0.02=R, Therefore R= 150OhmsBlueprint said:Ok thanks guys... It's a bog standard 2mm LED, think its a 2v LED. how do i work out the current? (i'm not controlling it from a MCU yet...)
I wouldn't consider anybody as genius only because he/she can calculate proper resistor for LED. :lol:Blueprint said:You're a genuis thanks v much .