Simple LED circuit - basic electronics
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- čas přidán 7. 09. 2024
- How to design a simple LED circuit. Which resistor to use, How to calculate the resistor.
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I love these videos, the graphics is so good these days. I wish I had access to info like this in my teens back in the 1970s.
All I had was ETI magazine, Practical Electronics and Hobby Electronics. Anybody remember Hobby Electronics??
I totally enjoyed this video. Simple and straightforward information.
i forget some of those things and making project 1 day ago and wonder how to calculate, you come in time to save me, ty for the great videos keep it up
What a great channel. May you be blessed with goodness.
This video helps with a worksheet I had recently, thanks!
Excellent. I need to rewatch it.
Interesting! Thanks
is there a way of checking the parameters of the led when we are not sure?
Can temperature of the LED be a useful measure to determine proper current/over current?
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Thank you very much for your hard work, it taught me a lot.
The best video on the subject.
Excellent
this channel a gold
Very interested video.. I like discus about electronic componen t
Thanks You Sir
thank you Sir. subscribe is DONE and notification is ON
good video i was able to learn a bit, i got lost at the 2:48 power part because the current was not listed in the previous data sheet you put on the screen but it was ok.
Great info. Thank you.
My first semester of electronics school. The basics are important.
This is just the video I was looking for!
Did you calculated only the resistor power consumption at the end of the video (whithout adding the LED consumption)? just asking i'm an amateur, but interested in arduino stuff .Great videos, very helpfull :)
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I've searched literally the whole planet for these answers. I even gave up some time ago... Thanks man 🙏
We have a lot more where that came from, check out some more videos.
@@EngineeringMindset i did... great job man . I love how simple and thoroughly you explain everything. I'm an electrician i knew some of the stuff in your videos but now i have a much better idea how things work 👍🙏 . I wish i could pay in that donation section !! But unfortunately i live in the asshole of the earth known as Iran, which the currency is 100 years behind
Glad to be of help. There are other ways you could help, rather than paying. Sharing links to our videos with as many people as possible for example 😉
@@EngineeringMindset i will do my best 😊👍🙏 thank you again
very informative.
Thank you.
Nice video. Anxiously awaiting manual subtitle upload.
Ingenious 101
Where is the promised @ 2:24 explanation of combining the resistors at the end of this video ?
I was asking this question 2 months ago and again now.
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great
Thanks for your video
Brilliant, thank you
The silver or gold bar is percent accuracy, so how do you figure that in to your select the better resistor? Does the led have the same standard?
The tolerance of resistance isn't that big a deal, as long as the tolerance range isn't too high such that too much current goes to the LED shortening it's lifespan or breaking it all together
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Thaks for this video
Nice calculation
Thank you.
Subscribed. Loved the video
Excelente, un saludo
I may have missed something but how did you identify the Resistor as being a quarter watt resistor?
You can determine the wattage by the size of the resistor. The small resistors commonly used are a quarter watt
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Watch our videos on electrical current and voltage
@@EngineeringMindset right on thanks 😊
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isn't 0.126 W should be converted to 1/8 W ? or is there something that i missed ?
no offense, this is what i want to know about these lamps. Thanks ;)
Wow great..
great contents for me. the answer is 350 ohm.
SUPER!
Thanks
Question: Does the voltage drop equal to the required input voltage?
So for the example shown in the video with the 9V battery, could I just use a 2V battery with no resistor?
Full explanation here czcams.com/video/7d4ymjU9NqM/video.html
@@kennmossman8701 got it, thanks.
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why do we calculate the resistor voltage drop (9v - 2v = 7v ) ?
why don't we apply Ohms Law directly : 9v / 20mA .. ?
@Chandu You're good mate, thanks
@Chandu There's very often no reason to run an LED at the maximum current. Different color LEDs have different forward voltages, and "guessing" at this will encourage novices to use higher currents rather than lower. For most users, most of the time, Vref/I will yield an appropriate resistance without regard to the voltage drop of the LED. In the example from the video, a 9V supply and a 470-ohm resistor would work quite well with the same LED, at lower current and power. The light might be a little dimmer, but many times LEDs are only used as indicators anyway.
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Good video
👍🏻👍🏻
When I was a kid maybe 10 or 11 and 38 now but I was experimenting with a red flashing LED and 9 volt battery I never put a dropping resistor and that battery lasted me about 2 weeks before the LED became dim. I don't know if it's because of the actual pulsing of the LED but it lasted for quite a while.
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A flashing LED has a chip inside it that limits the current, so a resistor may be needed. First one I found at Digi-Key was rated 3.5V to 14V.
I just have finished an extremely simple passive pedal. I have added this led circuit to it. Everything works, except when the led is powered and i engage the pedal, i experience extra hiss. Are there any options for filtering this unwanted added noise generated by the led circuit?
Very interesting 🤔….
In the Ground, Neutral and hot wires video the wire that returned the current to the source was called the neutral and the ground was just the safety net but in this video it’s called the ground and there is no neutral mentioned? I’m confused
Osm video
Nice video ☺️ ❤️
Love these videos. Keep them up
That's great
Nice textbook problem. But what do I do in reality where I have an LED from a box of LEDs and that's all the information I have. My multimeter can tell me the voltage drop but how do I find out how much current the LED can take?
You can usually eyeball it. And if it pops, you just take another from the box and increase the resistor value. :)
@@kennmossman8701 STD = standart... but if you are bad at phuns sure make a disease out of it.
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pro tip if you have potentiometer just set it to highest value then lower it slowly I usually use this to find the brightness level that I want then later use resistor
Good sir vdo
Nice
I need to get to grips with this stuff , as i'm in the process of doing exactly this . I'm adding two led's into a 12v circuit . I tried to keep things simple by using 12v led's , but at 20ma , i figure a resistor will need to be used . If i understand this correctly i don't , am i correct ? .
Quite aside from the above , i would also like to dim the led's , as they are for panel illumination , so what you have explained here is extremely useful . The minimum voltage they will work with is 5v , so to adjust the brightness , i may mess around with voltage .
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What if you don't have the current info and just have to go with voltage drop? How would you calculate this with missing info. Sorry, too tired to think lol. Thanks.
Are there any more efficient way to lower the voltage without using a resistor?
Just use a 3V coin cell. The internal resistance of the battery limits the current.
Using a led driver, basically a timer circuit that will create a pulse instead of a constant current. This is why most LEDs in consumer electronics cause a strobe effect when you move your fingers in front of them. It also helps increasing their lifespan.
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I never calculated the value for Led mostly because most of my devices wouldn't last very long so I never found it necessary to calculate the value except for when I don't want outrageous Heat coming from the resistor
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I used to be an arospace eng. and would buy 10 of each and find the closest one.
Interesting.
@@danielrichter465 oh no a bot... imma report you for spam.
The bot has now been banned from the channel
@@EngineeringMindset phew, i've seen a couple of videos about them from atomic shrimp.
Thanks man!
You can't believe how many bots we get posting porn, crypto, fake medicine etc. They are becoming very organised, often posting entire fake conversations between multiple fake accounts so it looks legit, to try and manipulate the viewers into clicking links and searching for something. I try my best to capture these with filters so that our viewers aren't exposed to it but occasionally they get through....temporarily. Thanks for highlighting it.
Oh, I feel you man.
9V - 2V = 7V
7V / 0.02A = 350 ohms
Video on circuit protection?
Please enable subtitles/cc in Portuguese (Brazil).....Thanks.....
How do I find the required voltage drop and the maximum current required by the LED?
Watch this tutorial, don't skip and make lots of notes, everything you need to know czcams.com/video/7d4ymjU9NqM/video.html
Every resistance has wattage apart from voltage! How this wattage of resistance is calculated?
Watch this in full czcams.com/video/7d4ymjU9NqM/video.html
Can you explain about diode like this ?...please
An LED is a diode (Light Emitting Diode) and it works just like a diode where it passes current in the forward bias direction. The only different is that it lights up when it passes current. If you put a voltage across it in the reverse bias direction then it won't pass current or light up. A Zener diode will pass current in the reverse bias direction but only when the the reverse voltage is achieved. They provide a simple mechanism for voltage regulation in a circuit.
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If the Battery is 12V can we just use a 12v led? Without resistance?
Seen the new LED explained video? so much detail covered! czcams.com/video/O8M2z2hIbag/video.html
1 video about ICs
It’d be good if the video started with the formula required.
350 ohms is the resistor for the Yellow LED. you could us a 390 and LED would still work..
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Can we use two resistors in series for non-standard values?
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@@EngineeringMindset thanks!
how about in AC sir?
The moment you realize that he had the answer to the question input in the website right before the question
I am trying to develop an LED Guitar Pick where it lights up when you strum. I am trying to make it so the circuit will be in the shape of a guitar pick. If someone can help, it would be massively appreciated.
Could just use a coin battery 3V with a white LED, legs spread across each side of the battery. It'll light up when you push the legs down. Just need a bit of rubber to push the lead back between strums and a pic shaped bit of plastic attached to the end.
I'm watching this just for fun
We've gone full circle!
The pfp makes this comment that much more hilarious
Does the resistor consume power?
I would say consuming isn't a good term. I would go with it dissipates the excess of power in Circuit.
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You don't need a current limiter for thermo resistance drop runaway?
👍
What is correct? 3.2-2.5/0.02 = 35 or 3.2-2.5/0.002=350
I have a doubt
When a LED and a resistor is connected in series then why the resistor decreases the current flowed to the led
But when we connect two loads why the voltage is divided into the both loads
@@kennmossman8701 But why?
Why not resistors act like that?
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@@EngineeringMindset Thanks bro
I have already checked.
Seen the new LED explained video? so much detail covered! czcams.com/video/O8M2z2hIbag/video.html
Haha I calculate all of it correct, am I smart? 😆
(Just kidding my calculator is the one calculate all resistance of the resistor)
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How did you convert… Power= 0.126W into 1/4 watt rated resistor?
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So to drive 2 LED's in parallel it would be 1v divided by 0.04A for 25 ohms, eh. E= I x R Ohm, ohm on the range...
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Is this Also true to ac current ?
I tried for ac220volt and it failed
A LED needs DC, so you need to rectify your ac to dc. If you connect you LED you are basicly reverse the pols of the LED at grid frequency and they don't like that.
@@zn4rf led itself a diode. Led with 120-150k ohm resistor working fine.
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Could someone answer my question? I have a 3 volt battery and a 3mm led that needs 2 volts and 20ma. Checking with a multimeter the battery has 3.2 volts. So I need to use a resistor to get rid of the remaining 1.2 volts. 1.2 V / .02 A = 60 R. Here is the thing, I burned up two leds without a resistor. So those leds took the full 3.2 volts. Then I used a resistor with 330 ohms and the new leds used lit up nicely. So I used a 330 ohms resistor instead of one with a value of 60 ohms. 1.2 V / 330 R = 0.0036 A. How can it be that a led that requires 20ma still lits up nicely with 3.6ma? Or am I making a mistake with this conclusion? And is the Led receiving more than 3.6ma? (I checked the resistors with a multimeter) Hope my text is understandable.
Full explanation here, please watch in full and make notes throughout to fully understand czcams.com/video/7d4ymjU9NqM/video.html
@@EngineeringMindset Thank you, appreciated! 😊
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It's 350 Ω.
350 Om
350 right?
350 ohms?
350ohms
Led means
What ?
2:27 Your graphic reads "Which power rating should the LED be?", but you then you show the steps to calculate the power rating of the resistor.
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@@EngineeringMindset I was just pointing out that you say "We will also need to choose the resistor power rating", but your title on that graphic is "Which power rating should the LED be?", and you show the steps to calculate the power rating of the resistor, not the LED.
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@@EngineeringMindset I see you are spamming your commenters like a robot instead of responding. Consider your channel blocked.
ни)(уя не понятно, но очень интересно.
350ohm
350 ohm resistor is required
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35kohms bro