LED current limiting resistor calculator

Calculates a current limiting resistor for LEDs.

Example 1: Must calculate the resistor for a led string of 4 green 5mm leds and 12V supply

View example

Supply voltage		volts
Target current		amperes
Led color	RedGreenYellowOrageBlueWhite
Leds in series		pcs
E-series	E6 (20%)E12 (10%)E24 (5%)E48 (2%)E96 (1%)E192 (>1%)

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Fill all the values of the following

• Supply voltage - Operating voltage of the circuit
• Target current - Target current of a single LED
• Led color - The emissive color of all the leds
• Leds in series - Number of leds connected in series
• E-series - Resistor series to select value from

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