LED Resistor Calculation

How do you select the right size resistor for an LED? This video will guide you through the calculation to select the proper current-limiting resistor for an LED, given the LED's forward voltage drop, desired current, and the voltage of your power supply. It also covers more complicated scenarios like combining multiple LEDs of different colors in series or parallel, and how to make sure you don't exceed the power rating of your resistors.

Don't have the right resistor value laying around? Check out this video to learn how you can combine resistors in series and parallel to create almost any value you need:    • Resistors in Series and Parallel  

Don't understand why I said it's OK to put the LED before the resistor? Watch this video for an explanation:    • Does the resistor need to go before t...  

Have a question? Ask in the comments and I'll do my best to get back to you.