LED resistor calculator

LED resistor calculator

Very often we are in dilemma of selecting resistors for LED and we end up putting a 330 ohm or 270 ohm resistor but this genius devil (Giorgos Lazaridis) found an interesting way to calculate value of  resistor needed for current limiting.  As you can see in the video you can put current and voltages in this dial and what really cool is that you can even calculate power dissipation across the resistor just from this dial. This is in deed a Genius Devil’s idea.

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