Basic Electricity - Resistance and Ohm's law

[@nadiyahserrano8827]

it's videos like these that make me second guess why I'm in college learning this stuff when amazing people like you explain it so much more thoroughly than any of my professors ever could, and it 's their JOB.

[@XanthiumIndustries]

we have a youtube channel that deals with Arduino,ATmega328P,Java,Serial programming ,robotics. So if you like these stuff do Subscribe. Sorry for annoying

[@bobsmithy3103]

I love how you show real world examples and all the sparks and fires. It makes it a lot more engaging especially so when you know the consequences of doing something wrong has very real potentially dangerous outcomes.

[@luvinscb]

came here because my physics teacher can't explain well- 👁👄👁

[@AshokDewan]

God bless you man. Please keep up this good work. I am from infosec. I wanted to learn about electricity. I always learn anything by visualizing and by imaginating it. So, your animated videos are very useful for visualization in mind. Thank you so much

[@kirillvishnevsky6327]

Ashok Dewan Waaaait a second. I am from infosec too and I want to learn about electricity😑

[@greatscottlab]

Great video!

[@ArsyadKamili]

Woah, you're actually here. Just to let you know, I love it when you explain a 'somewhat complex' circuit using your Keysight. And when you start taking notes and do calculations, that's when I feel somewhat advanced and professional. XD Love your vids, thanks.

[@himanshu9559]

GreatScott! You too do great job

[@louisciamillo8690]

Hey scott! I love your videos!

[@FunScientifix]

wohooo. hiii

[@lvb1b463]

Great Scott!!

[@jacksonwhiteley]

I really appreciate all the detail in your videos and when theirs a lack of detail you refer us to an explanation in another one of your videos. Electronics is my biggest engineering weakness and so what better thing to do then to learn it, and with your help I can. Thanks -Jackson

[@paulglad5615]

Great video! The extra detail you put in describing how it works helps a lot. Examples both written and in performed in real world are excellent. More examples the better! I've watched multiple videos on resistors but I learned the most from yours. Looking forward to more videos.

[@jollyscaria1922]

The ratio 0f r.ms value the average value of an alternating quantiy is called frim factor .. Rms .value /average value 1m£2 /=€\21M2€m=1.11.

[@mayankgaming5214]

best explanation about resistance i understod by seeing this video with experiment and by knowing about wich colour have what amount it i really a great video

[@ncedwards1234]

3:50 has done a much better explanation than anything anyone else has ever told me.

[@castigohd]

explosion at 5:53 made me jump from my chair 😂 for some reason I was concentrated on something on the screen and when the explosion happened, it made me jump

[@castigohd]

@Badr Ahmed headphones actually... yes

[@pinballplayer]

that poor Raspberry Pi...

[@md.mohiulislam6516]

i see around 15+ video but i didn’t understand. this video clear all misconception.specialy mathematical part is very helpful. thanks a lot.❤❤

[@vincentnoche8644]

finally a video about LED's that I can understand. thanks bro

[@kagazki7026]

Oh my God! Thanks so much for that comic! Everything makes sense now.

[@thermosinthesis]

Dude you literally just saved me my IGCSEs are in a day and this came out today

[@rudolphguarnacci197]

Hope you passed

[@Afrotechmods]

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[@cathyny83]

This video is a gems and is really well explained about the eletricity current. Thank you so much!

[@ahmedsspharm2004]

Wonderful illustration

[@atombatumbakaljr.4174]

Very informative....how I wish you were my prof in Electronics before.

[@aerickajm9298]

3:52 *crowd cheers* 3:57 *crowd boos*

[@MarcusT86]

The fucking fuse being handy for not burning your house down in the first vid made me laugh, the Minion squealing whaaaaaat in the second vid cracked me up, and now the dried out carrot for a resistor in this video made me lose my shit!

[@freddyfriesen]

Two thumbs up from the retired teacher of electronics.

[@kwissiekwissie]

WOW!!! PLAIN and SIMPLE. good video!!! #TheBest!!!

[@nvcworld6423]

What a nice explanation too good, You have a great knowledge in yours field , please keep it up 👍👍👍👍👏👏💐👏💐💐

[@bigfoot1980]

Man im jealous! you got some very nice equipment. Great videos too, really helped me to understand LEDs. Do you think you could do one about the LEDs like in a remote controler sometime?

[@imakeitwhynot]

Always so well explained. Thank you!

[@sarathraj6194]

keep doing a videos. its very useful for basic learners..

[@biyomjaiswar_]

Very informative video Thank you ☺

[@leytonjay]

It's smart the way you link these together. But damn you, I need to go to bed!

[@jasonarnoldvo]

Thanks for these! I've started an Arduino class and getting these concepts isn't easy for me. One thing I still don't understand about resistors is that you can put them anywhere in the circuit and they still work. In my mind they should be placed between the power source and LED so the LED doesn't get fried. But I've seen that the resistor can be on either side of the LED and it works fine. Why is this?

[@Afrotechmods]

Because the resistor limits current, and current is always the same at any given point in a simple series circuit.

[@laserdiode]

It doesn't matter if the resistor is before or after the led because either way it is still between the power source and the led.

[@rocko6439]

I am confused by the placement of the resistor. At 0:27, the video shows too much current flowing thru and the LED blew up. At 3:23, the video shows a resistor connected to the negative lead. I'm assuming the current is flowing from negative to positive, since the LED didn't blow up. At 6:07, the video shows the resistor connected to the position terminal, which is opposite to 3:23. This is where I'm confused. I've always heard that electricity flows from positive to negative. Also, I've often heard that it's not the voltage that kills you, it's the current.

[@thesnakesage3458]

this was really helpful

[@bensmith9253]

FANTASTIC video!!

[@kamalakarchkamalakar1153]

Super explanation

[@malaktouqeerhaiderkhan8943]

I have leart many from your video thanks bro

[@ronsbeerreviewstools4361]

Great informative / educational video.

[@antonioadkins5104]

The best resistor app I used is electrodroid.its easy and simple

[@Fatima_Bricks]

I don’t get one thing at the start of the video you mentioned the resistance or “bumping” causes loss of heat energy due to which bulbs light up so why at the end of the video the LED became dimmer when the resistance was high? Doesn’t high resistance means loss of more amount of heat energy so it should be brighter

[@roberthagedorn3574]

just in case you quickly want to jump to the next video (because the teaser at the end works!) and can't find it linked here somewhere: kzbin.info/www/bejne/jITTc2Z-ntuenrs

[@Catstorm99]

Could you help me understand something? If we put a bigger resistor in series with an LED it will be dimmer and the battery will last longer right? But if the resistor reduces the current to the led by “consuming” that power and giving it off as heat then the battery life should in theory be the same. Have I misunderstood it? Thanks, great video buy the way.

[@gurjeetkaur2973]

Did anyone else almost jump at 5:47 - 5:55?

[@yourviralvideo2169]

no

[@christojarald7642]

easy to understanding

[@toxicore1190]

in Germany we use U instead of V

[@3rdpartyU5er]

Same in Finland.

[@appelnonsurtaxe]

Same in France

[@raymondj8768]

you guys just trying to be different hahahaha

[@akshays8655]

???..a doubt from India

[@joew4202]

Forget memorizing color codes. Just use a multi meter to measure the resistance of a resistor

[@EFIELDIQ]

Thank you sir 💯 concept clear

[@bosonglin7462]

Thanks for the knowledge!

[@thepolymorphicaris1939]

Thank you so much sir!

[@tomjeffersonwasright2288]

Nice video, and a very easy to swallow robot ad.

[@israelcastellon4478]

I am going to the western states corrosion seminar. Any advice on how to pass the test?

[@hectichive889]

7:18, why would the resistor be going on the positive side? Wouldn’t you want to put the resistor before the LED light? You know since electrons are flowing from the black wire, the negative terminal... or does it not matter?

[@venkatnandan8767]

Tanks for this video

[@donut1375]

I just wrote my Technology exam... then I find this video after the exam. It would have been much more useful before my exam. Would have scored me a few more marks :/

[@justken5]

2:07 he is the chosen one

[@lukearreola3025]

Had a science project this really helped!

[@stroomchannel6508]

Nice video...

[@LectronCircuits]

Ohm-my-goodness; resistance is not futile. Cheers!

[@herrsick364]

So you say keeping the current off by 10% is not a problem? im asking because i have 2x AA batterie in series with 1.6V and my LED is recommended for 3V and 20mA. so i don't need to get a resistor at all? Im just double checking. 3.2V-3V = 0.2V --> 0.2V/0.02A = 10 Ohm. with 10% Current diviation i would be at 3.2V-3.3V and therefore 0V/0.02A=0 :)

[@mikos306]

make high resistor ampere to catch the limit of volts from led light

[@katrinebohr3119]

Thanks!

[@JohnEnduro]

Dumb question, but with the 9V battery and the led case, does the surplus 6V get lost due to the resistor or it just restricts the flow to 3V?

[@asgharalirajput9510]

Big like video sir

[@macker33]

Ok, guess i know now why i cant get four white leds to light up using two AA batteries. Came to learn about current, ended learning about voltage drop.

[@carlosbanegas7577]

thank you

[@haidermehdi81312]

What happened if we use another resistance in a place of other resistance

[@ExtremeEngineering]

thanks

[@سامىالأصيل]

شكرا لك

[@jamescalifornia2964]

LEDs have come a long way fast ...👍

[@DIlic-iz9tx]

*_BRAVO, SUPER._*

[@starcitizenmodding4436]

im such a nub with electronics im not sure how to ask this but here i go. if i wanted to press a button to cycle 3 lights. so i press and one light is lit then press again so the next is lit and so on. i realise i could think up a circuit with relays maybe. but my real question is how do i find out what ics do. because i know alot of the things i do will probably be easier with an ic. i want to build a flight control panel. just an answer to point me in the right direction will be fine. Should i work out how those 555 timer thingys work? Thanks

[@amardeep100]

What if the battery's V is lower than LED's V will the led glow dim or battery will drain faster ? for eg If I connect 4-5 3V LEDs to a 9V battery, what will be the consequences.

[@АнтонБугаев-б9ъ]

Thanks a lot for the brilliant explanation! Could you please explain one thing to me: On 6:47 there is an example of calculating voltage for a resistor and a LED circuit. Why is it necessary that throughout the whole circuit the voltage is 9V. Is it not possible that, for example, 4V is lost at the resistor, 3 Volts lost at a LED and 2 Volts remain.

[@АнтонБугаев-б9ъ]

@Fred Smith Thanks a lot! But could you please clarify, why the resistor leaves exactly 3 Volts for a LED? In other words, how does the current coming to a resistor "know" that it has to spend exactly this amount of energy (6 joules per coulon)?

[@АнтонБугаев-б9ъ]

@Fred Smith this made many things clear to me, thanks a lot!

[@momogunsabah]

helo. what is different with Ohms between electrical and sound system? let say i have 8 ohm speaker. what is that means?

[@starcitizenmodding4436]

1:08 i feel like you explained why super cold computing is a thing.

[@Afrotechmods]

Very astute. That's actually the part where in a draft of the script I was going to talk about superconductors and stuff but I felt it was too big a tangent.

[@starcitizenmodding4436]

Sweet! thanks for confirming. im on that knowledge ting lol. Its surprising how much youtube can teach if you want to learn. i learned electronics a few months ago just so i could modify my joysticks. That was my drive but once i learned i felt like it was so easy and useful i had to teach it somebody. so i made a small channel. Plugged :/. btw you have great teaching skills dont stop.

[@makerKID5]

Why am I buying resistors when I can just use a dried out piece of carrot?

[@ArsyadKamili]

Sir, you've made my day.

[@superdau]

I don't know about you, bu I always had problems tinning the ends of the carrot. That's why I started using resistors.

[@tablatronix]

A new unit of resistance? The impedance of this circuit is 3 dried out pieces of carrot.

[@makerKID5]

tablatronix 😂

[@TheOswald42]

ys, you can add it or slowly sandpaper it to desired resistance

[@billigerfusel]

That feel when you're an electrical engineer already and still watch Afrotechmods, because he makes good videos.

[@FunScientifix]

billigerfusel right in the feels 💛

[@LexyGamesLB]

Same

[@spacy50]

billigerfusel

[@bettymaevilla9893]

I want to be an electical engineer too. ❤

[@Joe-bu9ei]

Same here, i'm near retirement after spending 41 years in electronics trade. Why am i watching this video? Good video for youngsters to learn from. Please stick to battery power until you know what you are doing. Stay safe. @billigerfusel

[@IoanaC.]

At 0:22 - 0:23 you can watch the little LED's soul being lifted to LED heaven

[@renae9450]

this comment made me cry an LED tear..

[@epiendless1128]

0:24 "I'm not dead." 0:26 "You soon will be." 0:27 "He's died."

[@rudolphguarnacci197]

Poor LED was sentenced to the electric chair

[@someguyontheinternet-]

Bwahahahahaha!!!

[@princey_06]

Idaho Made bmwahahah

[@crumplingguyvseverything8320]

My friend told me how electricity is measured and I was like Watt!

[@mudkip9531]

What is seen cannot be unseen...

[@muhammadsufian117]

electricity is amportant

[@KennethNicholson1972]

Ohmy God!

[@mmk7432]

NERD JOKES!!

[@samzwygart9097]

Those jokes make me Hertz!

[@origummy_]

Your videos are Awesome! It took me 2 years to fully understand all of these things myself, if I would have found this channel beforehand it would have taken 2 days. I hope your videos get to as many enthusiasts as possible! Thank You!

[@Simonjose7258]

Wow! This is totally electronics for dummies. Thank You! This is what I need.

[@evansymonds5400]

Even my leds blowing up are less exciting than yours.

[@Mindful2222]

afrotechmods, your videos are superb, waiting for the next one!

[@fergusoddjob]

Afrotechmods you are an amazing teacher, these videos always clear stuff in my head despite doing electronics for so long your understanding of the topic is very very impressive.

[@olddirtbikerider]

That's revolting! you never know watt to expect! Don't resist the temptation to laugh every now and then, that's the most current joke I know. Great video. Thanks for sharing with us dummies.....

[@SreenikethanI]

I am really amped up when I hear/see puns

[@username0004]

@@sushmaverma3562 no u

[@sushmaverma3562]

@@username0004 oh fuck

[@chrisdaniels3929]

Ohm y

[@ryan624]

I need a resistor for my head it's getting fryed

[@jenycek2222]

i calculated it for myself and it was 69,42 petaohms

[@richard1113]

In your simple circuit with a 9V battery, LED, and resistor @5:58 I see the resistor on the anode side. I've seen this before and know it works but never understood why. Can you explain? If electrons flow from negative to positive I would think that this location is "too late" to save the LED. Wouldn't it be more appropriate to have the resistor on the cathode side?

[@runeklok]

In this case it does not matter which side the resistor is located in the circuit, so long as it is present. The omitted part of the video does not detail the fact that the entire circuit is in so called "series," meaning that every component is tied end to end with each other. In this format, the current is determined by the circuit voltage divided by the entire circuit's total resistance. The cool part of this setup is that the resistor and LED will both experience the same constant current in amps while having different voltages, since the individual component voltage is current times resistance. The only concern of resistor placement would be if the circuit was so called "series-parallel" where a drop in voltage could cause power problems in other branches of the circuit. Another concern on resistor placement would be purely for safety concerns if you wanted to limit a particular side of the circuit's current that might be exposed to human interaction, say a light switch.

[@dontbetonit813]

Richard Forester Seriously don't do anything with electricity take up macrame .

[@harveysmith100]

You are correct in your thinking but it will resist the flow in the entire length of the circuit, from battery back to the battery.

[@rli1618]

In this case (since the circuit is in series), the current at any point is the same as the current at another point. What dictates current is the overall resistance. Resistors don't "use up" current in order to save the LED, but instead limits it overall.

[@____Alan____]

I've likewise been thinking about this issue recently and am still confused about it...Glad Harvey and Ryan chimed in with their answers. Not sure why that apparent aspect isn't proactively noted more often when explaining this subject. I.e., the fact that a resistor (at least in a series rather than parallel circuit) will effectively decrease the current of the entire circuit (rather than simply a locality of it proximal to their placement). Because it seems (I would think) an obvious question for curious electronics newbies like myself. So yeah, I can defintely see the overall decrease in flow of electrons meaning lower current level the LED will be exposed to...BUT, is the voltage level the LED will be exposed to identically effected by the resistor (or is it, on the other hand, comparatively more dependent on location in the circuit relative to the resistor - i.e., whether it precedes or follows the resistor in the direction of electron [not conventional] flow)?

[@relativenormality]

another great video from one of the best electronics channels on youtube. more please - happy to sit through adverts for your content!

[@VitaminB88]

⁷

[@JimGriffOne]

08:30 - 2.74W dissipated from a 0.25W resistor. Magic smoke released. Very hot electronics porn!

[@lvb1b463]

Porn?

[@JoshWeaverRC]

LVB1B. You rather someone shit on your chest?

[@voneschenbachmusic]

Poor Raspberry Pi...

[@queenjoy7217]

I thought the same

[@jerdumz]

This video explained well than my electrical subject professor whom I paid a lot. life sucks

[@leonardfibigerlewis]

Sir... don't ever die, please! You are the best teacher I've ever had, and we're not even face-to-face! Your content hits the zen spot for understanding something that used to seem like an off-world language to me. With the deepest respect I can muster, I thank you. Leo.

[@silasfatchett5693]

V ---------- I x R Cover the quantity that you want to calculate with your finger, and you see the expression you need.

[@silasfatchett5693]

Or you would, if the editor hadn't removed the spaces before the 'V'.

[@tedspens]

62 and just now learning about electronics. I might have found interest years ago if somebody would have explained it the way you do. Subscribed and gonna check out some more videos. Thanks!

[@iggzistentialism8458]

"bad conductor, like this... er...dried out piece of carrot" has to be the most unusual choice of poor conductor to-hand I've seen, lol. Brilliant video. You have really helped my son learn the basics of electricity today, thanks for making these basic vids along with all your other awesome vids.

[@38823202]

Thank you for this video! I have a pretty basic question here-- I see you followed your conventional current flow diagram when wiring up the 9v/LED/resistor. Why did you not wire it up according to neg to pos electron flow? If the electrons flow from the anode and hit the LED before the resistor, how is the resistor doing its job? It seems as if the resistor would serve no purpose after the high current flow already the LED. What am I not understanding correctly?

[@seanlikestoeat]

I have the same question! Someone please answer!

[@Lemonade6969]

@@seanlikestoeat lost all hope, 4 years and still no answer

[@budgiefish]

Think about the current flow in a circuit as a whole - where does the current go OUT of the led in that case? If you connect one leg of the LED to a high current source like a 12v car battery, but leave the other leg disconnected, what happens?

[@FastusMusic]

question: so could I also place the resistor BEFORE the LED then, instead of after as you have here? seems if actual current is flowing from neg to pos, I'd want it to traverse the resistor first... or is the placement of the resistor unimportant because it affects the circuit as a whole?

[@TealJosh]

Well, here's the thing. Voltage and current flow are about voltage differential. You have to imagine that there's someone pushing the electrons at the negative side, but there's also someone pulling them on the positive. No matter what side the resistor is on, the current will flow just the same through the led.

[@martintownsley6544]

I used to have a Electronic project box from Radio Shack with 300 or more projects and I learned a lot about circuits, radios, etc, etc. But now that Radio Shack is closed, can you tell me how to get one? Thank you very much for these videos.

[@Flankymanga]

Uhhh that raspberry was a expensive test....

[@colepeterson5392]

not really

[@thehastyminer5467]

That's the entire point of the PI, to learn, and breaking it is a form of learning.

[@raymunds]

If electrons actually flow from negative to positive, could you have placed the resistor in series with the cathode side of the LED and achieved the same function?

[@lekshmyarun4127]

Actually electrons flow opposite to the flow of negative charge....

[@NikNik-bg7ex]

3:49 current abuse 😢

[@terryyouth]

at 6.01 you are reducing the voltage to 3v. and then you say so lets find out how much current is going through the resister. But this should have been found out before and then attach the resister!!??

[@octavio.august]

muy bueno el vídeo, me vino bien toda la información!! saludos de Argentina