Beginner Electronics - 15 - Ohm's Law
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- Опубликовано: 8 июл 2024
- We talk a bit about Ohm's Law and an important equation!
*DISCLAIMER - READ BEFORE WATCHING*
I am an electronics hobbyist; I do not have a degree in electrical engineering. This series MAY NOT teach all of the appropriate safety required for general electronics work. Any advice taken from this series should be checked with multiple sources, and a professional should be addressed to ensure proper safety.
See my website: codenmore.github.io/
Follow me on Twitter - @CodeNMore - / codenmore
Comment, PM, or Tweet me for help!
Teaching to understand all subjects to the fullest extent! 
Хобби
**DISCLAIMER - READ BEFORE WATCHING**
I am an electronics hobbyist; I do not have a degree in electrical engineering. This series MAY NOT teach all of the appropriate safety required for general electronics work. Any advice taken from this series should be checked with multiple sources, and a professional should be addressed to ensure proper safety.
Super interesting and useful videos! I'm working in an NGO (international development) and planning to use these videos to help youth living in slums in Kampala / Uganda to learn basics of electronics so that they could build hacks responding to their local needs. I hope it's OK to download these videos for offline use as internet connection there is too slow/expensive for streaming.
Thank you so, so much for making this series- the episodes are easy to understand for n00bs like me and you do a great job at explaining things!!
What an extraordinary teacher you are . Can't imagine you are teaching so complex topic in simple manner
Brilliant series! As you covered Ohm's Law, I remembered a very simple diagram to make remembering Ohm's Law so much easier. Draw a triangle with a flat side at the bottom. Inside at the top place "V", inside bottom left corner an "I" and inside bottom right an "R". Cover the letter you want to calculate. Eg. to calculate V we multiply I by R. To calculate R we divide V by I.
My two years of college were just refreshed and better understanding with these 15 videos. Please add more videos CodeNMore.
Thank you for these videos and I have subscribed.
I have been learning Ohm's Law since my first year session and teacher was not able me to teach me this the whole year that I learned in just 5 min!!! THANKS!
Thank you very much. I love your videos. I just finished lesson 15 and everything was so easy to understand. Please keep them coming, I have learn so much that was always difficult to understand. You are a really good teacher.
Nice and easy to follow tutorials. Just one point. The amps shown at 3:10 should probably be .024A
Lmao if you know so much why are you watching this 👀
He's right though, if you divide 5.8 by .24 its only 24.1 ohms not 240@@stormfirestormy469
Says the "expert" with no videos of his own....
@@peatmoss4415 damn you got me…
Loving this series so far. You really didn't need to apologise so much about "boring" people. I was glad for the refresher.
I'm loving these videos. Thanks.
Awesome videos man! Keep them coming! This is my first stab at electronics. I'm a senior dev who's finally taking that step to building stuff with hardware and I'm starting here
Thanks for the tutorials! I am a total beginner. I am an engineering major hoping to learn a bit before I actually take classes. These vids have been really helpful. Thanks man.
I enjoy watching these I even started taking notes since episode 1 and they're way better than the notes I take at school :)
You did a very good job introducing VERY early in your series the formula that calculates what amount of resistor to use to protect a component/LED. BUT, you never stated that the formula is one of the 3 formulas derived from Ohm's law. By just understanding that resistance formula, it makes Ohm's law a bit easier to understand. Trust me, I've had so many people get completely lost when I've started with Ohm's law and writing all of those derivatives. They don't know what 'V' is and how to calculate it. By introducing that resistor formula way early in your series, depending on how well they can do basic Algebra variable solving, it all made sense to them.
Ohms law pyramid good to remember, draw a pyramid with a uppercase t in the middle making 3 sections. V on top, r for resistance bottom left, and I for current bottom right. Horizontal line means divide and vertical line means multiply, just plug in your values that you have.
Great series, Stop saying it's boring, it's not without this stuff electronics would not be possible
waiting for your next video.. Your explanation is so good that even a very starter could understand.. So please make it fast...can't wait for new stuff
Awesome set of videos. I'm looking forward to more and plan on having my kids watch them. Keep the vids coming!
My new favorite channel
lets make that computer
Computer?! I thought we were making a diy Fleshlight!!!
A Huge Thanks for explaining the in-depth explanation for the LED forward voltage formula, relating to the Ohms Law. KUDOS to you!
Hope you keep on posting!
Really appreciate it :)
Not boring at all! Awesome videos been watching since episode 1 and is exactly what I was looking for! Thanks alot! 😁👍🏽
I hope you keep making these! Their super useful!
Yes I agree with the comments...excellent. Just wish you could make 'em faster! I have had trouble understanding all the jargon from books but your vid's make me want to go play with my bread board now (at 3am in the morning, maybe not a good idea). Thank you for doing these and keep 'em coming!
You’re a very good teacher.
How does an electrician meditate...Ooohm, Ooohm, Ooohm :)
Garold The Great r/woooooosh
@@plutozart8716 when you use whoosh but the other person who commented already knew it was a joke meaning you whooshed yourself
@@garoldthegreat1897 when ur just an asshole, and yeah have fun being the person everyone wipes over
Yall usin reddit
Thank u Sir. These are very useful videos. I am a beginner and understands the concepts from tutorial.. plz keep it up...
can you plz plz plz add more videos to this series yours is the best one i have found yet but i do love your videos though so definitely keep uploading them thank you
Made it thru 15 episodes and still interested. thanks so much
Great videos... perfect for newbies... Keep them coming.
Looking forward to the next video! Very helpful and easy to understand, thank you :) Keep 'em coming!
Great series. Well explained! Keep going!
New subscriber here. I'm absolutely loving your videos, you make things easy to understand. I hope episode 16 is on the way! :)
Looking forward to more!
Man it’s not boring. Thank you
CodeNMore love your videos and hopefully you have a cool voice and flow which stands out of all those boring videos around. would love to have the following videos :D
Great series I am learning so much cant thank you enough !
Amazing, you explained Ohms law very well now I understand it
It's not boring at all! good stuff
The are not boring the are helpful !! I learnt physic (Ohm's Law) from this video easier than class!! I still waiting for your promise to make 8bit computer!!
Thanks for sharing your knowledge
You r great bro.. i love these all videos,anyone can understand your videos,I got a great session throughout this.
Excellent tutorial!
is voltage drop the same as forward voltage?
CodeNMore, about Ohm's Law, we learned there is a "Rule of Thumb" for figuring it. You make a Triangle, (30, 30,30,) and place V at the top, I at the lower left and R at the lower right, with lines separating them. (In a T shape.) then to figure which one you need, you place your "Thumb" over it and follow what is left visible. i.e.: if you are wanting the R you cover it with the thumb, then see the V/I. For V, cover it with the thumb, then you see I*R. Very nifty.apps.usd.edu/coglab/psyc770/resistors/ohms4beginner.html
great videos! can't wait for more! :)
Honestly, a bit of a late comment but...
You're better at this than khan academy!!
Waiting for next episode !!!
Amazing you helped me understand Ohms law!
Thank you for your video's, it would be nice to see the next part :)
Thank uso much! I started from scratch but thanks to ur vids I got some knowledge but I feel let down cz no more vids! 4 months down the line...nothing! can we donate to make this serie continue?
Your vids are awesome! Thanks bro!
3:44 that's when I yelled ”جميييل” wich is pronounced jamiiiil it means beauuuuutifu!!l very smart way to explain the equation .
Good job on the video's! At what video number do you anticipate building the analog computer?
Awesome sir 💐👍🙏
thanks! do post more videos. thanks again
Superb vids
You're the best thank you so much!
Excellent
Hi
I'm loving the videos
Do you know when will other chapters?
Hi, very nice tutorial ;) please post more so i can learn more
Thanks alot in advance
HELLO, THANK YOU SO MUCH!!!
Finally! thank you
You going to have other episodes of Beginner Electronics?.
very simple nice!
New video please, and great series, were have you gone
Thanks very much for making this series, they're going to be a great resource once complete. (Hint hint)Very easy and enjoyable pace, but I'm really looking forward to moving beyond the introduction phase. Please do continue. Do you have a Patreon account?
One question... is it safe to put the maximum voltage the LED can take? Great video btw
more please!¡!!
Can we determine the amount of voltage an LED can handle with multimeter or any other way?
Easy way to remember the Ohms Law Equations. Remember that Voltage until very recently was generally represented with the letter E not V and that's what works for this little story that you'll never forget to help you use Ohms law.
Long ago before the white man came the Indian (I) walked out on the plains and he saw Eagle (E) flying over rabbit (R), or I=E/R
But then he had a vision of what Rabbit saw and he saw Eagle (E) flying over Indian (I), or R=E/I
The Indian had a vision of what Eagle (E) saw and he saw Indian (I) and Rabbit (R) level on the ground, or E=IxR
BillTheSlink That helped! Thnx man!
So the Indian was a 3 eyed raven
Fantastic series, thank you for that.
I have one question left. Previously we learned that Voltage is 'preassure' and Amper is 'flow'.
What I got my head scretching is when you said that 'this resistor will take away 5.2 Volts'. I was like huh, didn't we put the resistor to resist, e.g. reducing the flow and not the preassure?
I thought resistors only change the current but not the voltage.
So I guess my questions are:
- do resistors are reducing voltage AND amp?
- is there a way to only reduce one of them?
Thanks!
awesome vedios and you re awesome one please where the rest of the vedios
where at the second series videos? ive finished watching the first 15.
the videos are brilliant. learnt alot so far. but wheres the rest? got to 15 and it stopped.
I have a question. since forward voltage is the minimum voltage required for the LED(correct me if I'm wrong) shouldn't the maximum voltage be forward voltage + voltage that generates the max current the LED can take?
So if I use 2 x AA batteries (1.5v x 2=3v) instead of a 9v battery I would not need a resistor provided i use the same led properties.
(3-3.2)= -.2 and -.2/0.24=-.83. Is that correct?
So V that you put in the equation is the difference between battery voltage and led forward voltage?
love the videos keep up up the good work.. i have a question. first off i understand everything in the video and i understand your equation but i have a 9v battery just like you but i have a 12v bright led do i still need a resister or can i run it derectly??
+Ricardo Martinez the LED is a 12v LED? Wow. You shouldn't need a resistor if you are using a 9v source, but the batteries won't be as bright (unless for some reason I'm completely wrong...but I should be correct :P)!
How does this change if we have multiple LEDs in our circuit?
TY
Can we add one resisster for multiple led in circuit ?
when is your next video? i can not wait
I'm gonna ask if its possible to change the lead sealed acid batteries of my scooter into li- ion battery? as of now im using 36 volt...12 volts each with 14 amp.pls help me....I have evo scooter 800 Watt right away and I want to change the battery..
The symbol for Voltage is "E", not "V". V = volts, E = Voltage. If you draw a triangle and put the E at the top corner, I at the lower left and R lower right that would be a good way to remember OHM's Law.
these vedios are gr8
when are u gonna release the 16th vedio???
*Summary:*
- ohms law tells us the relationship between voltage, current, and resistance in a circuit
- V is voltage, I is current, and R is resistance
- ohms law says that I = V/R
- in other words, increasing the voltage will increase current flow, as long as resistance is kept constant (which makes sense)
- increasing resistance, while keeping voltage constant, will decrease current flow, which also makes sense
- electrical components (such as LEDs) have a limit as to how much current they can handle going through them
- electrical components use up some of the circuit's voltage
- current limit as well as voltage used, for an electrical component, can be found in the "data sheet" of the component (obtained from the manufacturer or googled :))
- you know how much voltage is provided to your circuit (because you know your battery), you know how much voltage the component uses (because you looked it up), thus you know how much voltage is left to circulate in the circuit
- you know the relationship that determines how much current flows in a circuit: I = V / R
- we want to limit the current in the circuit to what our LED can handle, thus we set I to that
- we know how much voltage is available to flow through our circuit (battery voltage - voltage used by LED)
- thus we want to find out, how much resistance to add to the circuit to get this much current with this much voltage
- in other words, we solve for R!
instead of the resistor, i could also use 2 leds?
I have a question what is positive and negative voltage?
In video 7 you just convert 24mA into 0.024A. here you write 0.24mA ??by the way very nice tutorials.
I have a question. In your example here, if I chain 3 of those LED, each taking 3V, with a battery of 9V, can I ditch the Resistor?
Late response but.. i tried this and it worked!
If I connect 3x 3.2V LED on 9V battery then I don't need a resistor in my circuit, right?
hello. i have a question. why are we subtracting 3.2v from 9v? i am new to electronics. i just want to understand the equation more deeply. thank you.
Hey there! I jut started watching your videos and first and foremost, a big thank you for the time you have taken to teach us all this knowledge.
I have one question as a beginner. I have a lot of old LED’s in zip lock bags from about 5 years ago with no manufacturers specs. I believe most came from raspberry pi canakits etc.
so let’s say I wanted to know what the manufacturer specs are just by having nothing except the LED’s. Is that possible?
I’ve have a pretty decent setup as far as multimeters, lab PSU’s and components go. Just never took the plunge so now I’m wondering whether I should just purchase new LED’s with manufacturer specs or maybe there’s a way I can still use the ones I have.
Use your multi-meter on diode mode.....it will tell you. 5mm: Blue 3-3.2v, Yellow 2-2.2v, Red 2-2.2v, Green 3-3.2v, White 3.3.2v
@@peatmoss4415 Thank you kindly for the reply! It’s funny how looking back at this question now, I’m astonished at the fact that I even wrote it!
It’s amazing what a couple of years can do and I’m sure your response will bring light to anyone else that stumbles by it.
When's the next vid it's been over a month, and how many episodes do you think it will take to get to the end?
Are you continuing this series still? Looking forward to the rest!
+kartracer919 yup, it's resuming this week!
+CodeNMore its been a loooooong month!
what if instead of reducing voltage with resistance, we kept voltage same and changed current to match the same power instead?
Will this work?
And how to do it experimentally?
No - the voltage max value must never be above the limit of the component, otherwise it dies . The current works the other way: you need to have enough current to feed your component. but if there is too much, it doesn't matter at all. It's more like the maximum capacity of the power supply to deliver enough current.
River analogy again:
Volts: if you install a water mill on a small river where the water goes at 2km/h speed, it might fall apart if the river goes at 10 km/h after a storm
Amperes: the same mill will work identically well on the Mississippi as long as the water doesn't go faster than 2 km/h.
If you place the same mill on a really small stream, even at the same water speed, there is just not enough water to feed it and it stalls.
So basically reducing the current (misleading term) will have no effect, unless you reduce it so much that there is not enough current to run your thing. Once the minimum is reached, however, raising the current to a huge value has no effect - your component will just take what it needs.
You can see it on power supplies: if your router needs 9v, 500mA, any 9v that can produce at least 500mA will do.
9v 200A is fine. 20v will kill it regardless of how much Amperes the power supply can deliver.
What are you using to draw???
please say when will u release the other vedios
So the resistor should take away 5.8 volts?