LED Resistor Calculator: Series and Parallel LEDs.
Design your LED circuits safely and precisely with our LED resistor calculator. Whether you're connecting your LEDs in series or in parallel, this tool instantly finds the perfect resistor value to achieve the ideal brightness and protect your LEDs.
Just enter your parameters:
Supply voltage (V) ,Number of LEDs, LED current (mA), LED type or color (red, green, blue, white, etc.)
The calculator automatically applies Ohm's Law and adjusts based on the forward voltage typical for each LED color. You'll instantly get the resistor value, power dissipation, and total circuit voltage making LED design easier than ever.
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LED resistor calculator.
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