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.
If you have enjoyed the video please hit the like button and share it with your friends. For more such videos don't forget to SUBSCRIBE our channel and please do share your feedback in comment sections. Thank you for your Support.
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How to measure Resistance with Digital Multimeter
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[@TechStudyCell]

Hi! For Series and Parallel LED circuit Resistance calculation please refer the following video:
th-cam.com/video/H69xDuon7vo/w-d-xo.html

[@ahmedayaz1972]

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[@gadgets.cracker]

How much ohms resistor should i use in white led circuit of 6 leds and 9 volt battery .
3

[@ahmedayaz1972]

Gadgets Cracker *Use 1.5 watt 220 Ohms*

[@gadgets.cracker]

@@ahmedayaz1972 should i use 2 9 volts battery so that forward voltage will be of 18 volts. And then use 1 ohm 0.25 watts resistor to supply power to 6 white 5 mm leds.
Please help me.

[@AlphaCreativity001]

Tech StudyCell nice 👍🏼 video

[@c1tlr340]

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

[@TechStudyCell]

You are welcome

[@muntazirmehdi3057]

@@TechStudyCell me also

[@KING4SNIPR]

When I start the video I forgot the time

[@mpxz999]

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!

[@TechStudyCell]

Thanks for the feedback 😊

[@Randy2747]

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 👍😉

[@TechStudyCell]

Thanks for your feedback...

[@rockytoptech1308]

Nicely done man! Good video. This will help many many beginners to electricity and ohm's law. 🤘🏽😎

[@TechStudyCell]

Glad it helped

[@fidztshuma1986]

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

[@TechStudyCell]

Glad it helped

[@fidztshuma1986]

@@TechStudyCell
i just realized I have another question

[@GeniusHamid]

Very simple explanation. good job, Conguralation.

[@laijugeorgh6348]

Explanation is very easy to understand 👌👌👌

[@TechStudyCell]

Thanks for the feedback

[@kabandajamir9844]

The world's best teacher thanks sir

[@camION4994]

Thank you for showing ohms law properly

[@rajuthanakotty9036]

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

[@omnisplash3041]

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

[@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.

[@fidztshuma1986]

perhaps you could also consider the wattage of the motor to choose the correct resistor with enough watts for the motor

[@prasuRangoli]

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

[@pra7nth]

Simplest way of teaching thanks a lot sir

[@abenwinUT]

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

[@TechStudyCell]

Thanks for your feedback...

[@sushantKumar-qk2cn]

Best video on the internet 🙂🙃

[@TechStudyCell]

Thanks

[@farrukhsaeed100]

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

[@thandavamurthyg5766]

I expect this information from long time. Thank you sir

[@bernhardnizynski4403]

Very clearly explained!

[@TechStudyCell]

Thanks

[@ssdravidian]

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

[@mdavidf]

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

[@TechStudyCell]

Thanks for the feedback...

[@abdurahimsalsalani7108]

Indian is the best teacher., Thanks sir

[@TechStudyCell]

Most welcome

[@utkarshsrivastava5674]

Very nice explanation, this video cleared my doubts. Thanks a lot. Keep posting such videos.

[@TechStudyCell]

Thanks for your feedback 😊

[@jimberry2967]

You made understanding this Math Very Easy and I appreciate Your doing so!!!
I'm just trying to make a few things with LEDs in them and I had No Idea how to figure out what resistor I needed to make a small lightning cloud using LEDs and a 9v battery.
Now I know!!
It's pretty obvious that I don't know anything about electronics but you made learning easy!!
Thanks Again and Happy Holidays!!

[@ska757]

That is a really good explanation and you back it up with the practical scenarios.

[@tonysalarda1970]

thank you for your very specific and detailed explanation..i really learned a lot..thank youuuuuuuuuuuuu..

[@TechStudyCell]

You are welcome 😊

[@a.rasheedh.m.aabidhrasheed6996]

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

[@TechStudyCell]

Thanks for your feedback

[@rajendramore1683]

Good knowledge, better explanation, and best demonstration👌

[@TechStudyCell]

Thanks

[@RadioFixer]

Excellent video about the subject. Great job 👏👏👏

[@TechStudyCell]

Thanks

[@ahmedsherbiny3505]

Thank you so much this video is so helpful

[@TechStudyCell]

Thanks for the feedback...

[@bhuveerchauhan4379]

Nice way of teaching

[@TechStudyCell]

Thanks..

[@akashkhan9187]

Thank you, Thank you, Thank you..
I was looking for it...

[@TechStudyCell]

Welcome

[@rudygerona]

I like your calculations & the schematic diagram. Well illustrated & understood show.

[@TechStudyCell]

Thanks for your feedback...

[@kayamotovlogph8554]

thank you for good and underdtandable tutorial,, God bless

[@TechStudyCell]

You are welcome

[@c.mdsalih]

Very helpful. Nice explanation. Thank you 👍

[@TechStudyCell]

Welcome

[@Columbariusify]

Clearly explained and useful

[@TechStudyCell]

Thanks

[@mahanteshgidnavar0008]

Very nice explained.. Tq.. very helpful.. happy with your video sir

[@TechStudyCell]

Thanks for your feedback...

[@carolecole1641]

Thank you for a great video, very well explained, kind regards Mike

[@TechStudyCell]

Glad it was helpful!

[@nityanandasubudhi2167]

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[@TechStudyCell]

Thanks

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[@grdhingra4733]

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[@TechStudyCell]

Thank you

[@ravikumar20062002]

Good explanation

[@TechStudyCell]

Thanks

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[@delrstudio.2252]

Best wishes sir!

[@sherwindy275]

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[@TechStudyCell]

You are welcome

[@Mr41627]

Very good teaching. No complexicity. thank u

[@TechStudyCell]

Thanks for the feedback 😊

[@gurudevlakra9229]

Thanks u sir...great explanation...

[@physicsforallanniefreeda8909]

Clear explanation. Good.

[@TechStudyCell]

Thanks

[@naderhumood]

Great experience and explanation my dear. ....👍

[@TechStudyCell]

Thanks

[@your.free.electrons]

Extremely informative...
I was looking for such a video...
(Subscribed already)
:')

[@TechStudyCell]

Thank you

[@mohammadorang-ojaboni4368]

thank you .i have lerned a lot.

[@rajab559]

nice explanation bro....thanks a lot....

[@TechStudyCell]

Thanks for your feedback 😊

[@allan6952]

Thank you sir !! Very clear, it really helped

[@TechStudyCell]

Thanks

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Nicely explained. Keep it up 👍

[@TechStudyCell]

Thanks..

[@kdgammingandtech3856]

great ... thanx for the information

[@TechStudyCell]

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[@awwwwww530]

Very very thankful. Thank you so much ❤️.

[@TechStudyCell]

Welcome

[@awwwwww530]

@@TechStudyCell oh yeah

[@willem878]

Thanks. It explained a lot to me.

[@TechStudyCell]

Welcome

[@TheBinarydeity]

Good video. Keep up the fine work.

[@TechStudyCell]

Thanks

[@rajeshchandrasekharan3436]

Excellent video , sir.Thank you

[@TechStudyCell]

Thanks for the feedback...

[@cristianpopescu78]

Great video! Thanks.

[@TechStudyCell]

Glad you liked it!

[@peckelhaze6934]

Well explained video.

[@TechStudyCell]

Thanks 😊

[@charshad5535]

Very good. sir 5V 2A ki sply hai or 1 Watt ki smd led light hai kitne ohm ki resistor chahiye?

[@alvinkk2338]

Learn something from you thank you..

[@TechStudyCell]

Welcome

[@TheMercuryraju]

Awesome bro your videos all of them are very useful to learn please doing different type of tiny switch fuction in pcb like TNY275pn etc.. Thanks

[@electronic7979]

Useful video

[@TechStudyCell]

Thanks for your feedback.

[@muhammadrafiqulislamkhan6994]

simply sweet to delivery. Thank you.

[@kashokkumar07]

👌👍 good explaination.. keep it up!

[@TechStudyCell]

Thanks

[@The_Absurdistt]

Excellent video. Does it matter if the resistor is placed at the anode of the LED? Or is it common practice to place the resistor at the cathode of the LED? What would be the reason for either? Cheers

[@yogarajusampathirao8879]

Nicely explained

[@TechStudyCell]

Thanks for liking

[@thebeybladearmory]

Does each LED need a resistor if wired parallel or just the first LED in the chain? Or do both wired parallell and wired in series need to have each LED have a resistor?

[@chetananam475]

A single resistance is also ok. We can connect multiple leds in parallel ( but of the same colour only). For different colour leds you have to use different resistor for every different colour .

[@muhammadrafiqulislamkhan6994]

You shoud be showed power rating here. P=VI is important as well as resistance and current ratings. Thanks for sharing.

[@rgodhnia]

Would you make vidoes using diodes
Its great to see videos with practical and theoretical examples like this channel

[@TechStudyCell]

ok. Thanks for the feedback

[@kushalbhaskar4401]

Great demo.....

[@TechStudyCell]

Thanks

[@hey4641]

Is the I constant? If not, where did you get the 0.03 a?

[@kundanchaudhary556]

Great video ...

[@TechStudyCell]

Thanks

[@senthilkumars7995]

Fantastic video bro

[@TechStudyCell]

Thanks

[@donnytreure1213]

Thanks for this video.
How do you select the power(watt) for the resistors?

[@TechStudyCell]

Please refer the following video:
th-cam.com/video/GSlxkce1_ks/w-d-xo.html

[@donnytreure1213]

Thanks very clear answer👍.
In that video you need a resistor 22ohms bij 3,6Watt. Can you use for example 3x6ohm 1Watt and 1 resistor 4 Ohm 0,5Watt? All in serie

[@s.karthikeyan9978]

Thank you sir ,for a simple explanations. With detail experiment.

[@TechStudyCell]

You are welcome

[@gameplayandreview]

Next Video Request: How can we add led+resistor in a existing schematics?

[@sheikhnadeemalam5813]

hi !! I am a newbie in electronics can you kindly explain why wattage calculation of a resistor is important...also in the video you said that we need to take a resistor of a higher wattage than 0.18W.. why so ??

[@TechStudyCell]

I have explained it in following video
th-cam.com/video/GSlxkce1_ks/w-d-xo.html

[@sheikhnadeemalam5813]

@@TechStudyCell O ! Just saw that video ! Doubt cleared...thanx!!

[@TechStudyCell]

Great 👍

[@nomokvil2044]

Thank you very much! It was so helpful to understand more! and to make things more clear and assured for me! :) Thanks! keep explanations up!

[@TechStudyCell]

Thanks for the feedback...

[@AzizSayan]

I use 9V battery and blue LED with 10K ohm resistor , but the led burned , i can't understand why it broked , i try another circuit with 1k ohm and the same thing the Led burned , what is the problem?

[@shootnetkw]

nice , thanks dear

[@prithwishs.1488]

Thank you so much

[@TechStudyCell]

Welcome

[@pallabmondal7389]

Very nice. Very good. Kintu sir apni to DC voltage er khetre LED glo korar video dekhalen. But ac voltage er khetre LED glo korar jonno ki oi ekoi sistem a resistor valu korbo? Please ekta video dekhaben.

[@roomrong]

Whether the resistor connected in parallel or series?

[@tuspat67]

Excellent video.... :)

[@TechStudyCell]

Thanks 😊

[@seangholipour3884]

Can you use .5w instead of .25w resistor? Thanks

[@hiranyabaruah2382]

Today i learn something.. Thank u

[@TechStudyCell]

You are welcome...

[@lukedelossantos5226]

is it okay to not directly connect the resistor to the LED?

[@Super_Natural_Power]

Hi nice video. May i ask if the temperature shud be any problem in this circuit. (resistors temp)

[@IIT2007]

Hi sir , i am giving 4.8v 700mah to the led of 3.3v then when I am dividing by your method i am geeting 2ohm is it right?

[@samuelsamu633]

Thank you brother véry useful the lessons 3&4 RGB led how to Assemble.thankyou.

[@Jestunes]

Will lowering the voltage using a resistance lower the brightness of the diode? I've tried to do the calculations but my mind won't process the information. Help please!

[@loginzastrzezony]

Hi, I have a question. I would like to connect 44 LEDs (7030) with a voltage of 6 volts to a voltage of 220 volts or a 12v power supply. How can I do this?

[@paulkazjack]

Very well explained my Friend. Thumb up!👍

[@TechStudyCell]

Thanks 😊

[@rctechmods8165]

But as the battery voltage gets low what will happen with led will it stays at same brightness or will it gets dimmer according to battery voltage please reply

[@chrisdalrymple53]

Thank you. This was well presented.

[@TechStudyCell]

Thanks for the feedback 😊

[@vikramnayak420]

Sir UV lamp is 11 voltage ... And power supply 12 voltage if I supplied 12 voltage it's working or burn ... Which register is required for supply 11 voltage