LED Resistor Value Calculator featured image
When we use LEDs in circuits we always use a series resistor. We've made it even easier for you to calculate the value of this resitor with our LED calculator below. You can also watch this video where Kevin explains why we always use a series resistor, and explains how to calculate the value of the resistor.
 

8 comments

Mark Donnison

Mark Donnison

Hi Jerrard, it's always best to go with the manufacturer's guidance. If it says it requires a 3V supply, it is best to use a 3V supply.

Jerrard

Jerrard

Hi i got a 3volt 1w led torch globe.. If i connect it to a 6volt battery… Will it burn out….

SURINDER MEHTA

SURINDER MEHTA

Use 20 ea Diode Red LEDs approx 2v each, I want to make parallel design which running on 12v battery for my bike indicators. Pls suggest Resistance value.. Pls help

SURINDER MEHTA

SURINDER MEHTA

20 ea Diode Red LEDs approx 2v each, I want to make parallel design which running on 12v battery for my bike indicators. Pls suggest Resistance value..

Mark Donnison

Mark Donnison

Without knowing the specifications of the LEDs it is impossible to say.

SURINDER MEHTA

SURINDER MEHTA

Hi want to make parallel red led (20 LEDs) design which running on 12v bike battery. Pls suggest me exact resistor value and help to make correct circuit. Thank you

Rob Haywood

Rob Haywood

Hi Ray, A single resistor for the amount of LEDs you entered in the calculator. Rob

Ray Taylor

Ray Taylor

H, ref. resistor calculator, is it giving me the resistor per led or single resistor for how many leds in the circuit

Leave a comment

All comments are moderated before being published