The Complete Beginners Guide to Arduino - 2021 - LEDs and Current Limiting Resistors

The video tutorial explains the importance of using a current limiting resistor with LEDs to prevent burnout and extend their lifespan. It provides a formula to calculate the appropriate resistor value using the LED's forward current, forward voltage drop, and supply voltage. Practical tips are given for cases where datasheets are unavailable, and common beginner mistakes are highlighted, such as using a single resistor for multiple LEDs, which can lead to circuit damage.

Why is it important to round up the resistor value instead of rounding down?

What is a common mistake beginners make when using multiple LEDs in a circuit?