How to select resistor value for LED with simple calculation (Ohm's Law)

In this video, I have explained how to calculate the resistance value for LEDs for different input voltage. It is very important to select right series resistor before using a LED in a circuit otherwise the LED may burnout.

I will request you to watch the complete tutorial video of the LED Resistor calculation but you can also jump to any topic by click on the following Time Stamps:

00:34 How to identify forward voltage, current rating of LED from datasheet.
00:54 How to calculate resistance value for 9V input voltage (Ohm Law).
02:21 How to calculate the resistor wattage in the circuit.
04:59 How to select the resistance value for 12V input voltage.

In this video, I have shown how to identify the LED rating from the datasheet and from that rating how to calculate resistance value and wattage required to connect the led in a circuit using ohm law for different input voltages. After calculation the resistance value we have practically measured the voltage and current value with a multimeter and compare it with the calculated data.
Here I have used a 3V led and calculated the resistance value in 9 volts and 12-volt circuit.

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Other useful videos:

How to Measure Voltage, Current & Frequency with multimeter

LED Basics - Polarity, Forward voltage & Current rating

How to test Diode without using multimeter

How to measure Resistance with Digital Multimeter

How to Connect LED Light to 220V AC supply

[TechStudyCell]

Hi! For Series and Parallel LED circuit Resistance calculation please refer the following video:

[ctlr]

This is exactly the video I've been looking for. Thank you

[mpxz]

Very clear step by step instructions!
Thanks for the great examples!
I appreciate that you wrote down the calculations as you spoke :)
Thanks a bunch dude!

[Randy]

Fantastic videos for a rookie like me, thank you for taking the time to make these videos! I'm in the process of watching all of your other videos 👍😉

[camION]

Thank you for showing ohms law properly

[rajuthanakotty]

Only one video about resistor voltage drop and current limit across the resister excellent

[farrukhsaeed]

You are too good bady thanks for explaining the resistor measures.

[fidztshuma]

BEST VIDEO for me, on this topic.... answering every question I ever had

[prasuRangoli]

After searching lot of videos stuff. Finally find right one✨

[ACTSRevolution]

I was looking for exactly these calcs for a tiny DC motor application. I think this will only work for electronic loads and not any kind of resistive or power load, although a tiny motor seems like it must be purely inductive, I still cannot get anything to work for the motor. A finely organized and clear video. This should help me going forward as a noob.

[kabandajamir]

The world's best teacher thanks sir

[abenwinUT]

Excellent, informative video. Great detail but not overly complex. Audio very easy to follow.

[pranth]

Simplest way of teaching thanks a lot sir

[omnisplash]

Simple and clear explanation. Thank you for such a great video

[a.rasheedh.m.aabidhrasheed]

I watch so much of videos but i cant understand but after watching your video i understand thank you

[thandavamurthyg]

I expect this information from long time. Thank you sir

[mdavidf]

Excellent presentation, I really like the way you presented and explained everything!

[ssdravidian]

good simple explanation that i have been searching for ! thank you....keep going !

[GeniusHamid]

Very simple explanation. good job, Conguralation.

[akashkhan]

Thank you, Thank you, Thank you..

I was looking for it...