Pull up/ Pull down resistor - explained ( with calculation )
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- Опубликовано: 10 фев 2025
- Guide to use Pull up and Pull down resistor in a digital circuit. Calculation of these resistor values explained with a digital logic gate. And the things to avoid while implementing your digital circuit design.
Calculation further explained here - www.gadgetronic...
Check out - www.utsource.net/ which is a online platform for electronic technicians, Makers, Enthusiasts, Kids to find electronic components
Video by : / frankdonald05
Assuming 100uA as in your example, you would use a 10K not a 40K.
You only want to drop 1V across the resistor, not 4.
Vcc - Vin / Iin. (5-4 / .0001)
Don't forget different values of current for sourcing vs sinking inputs.
Yes you are right. Apologize for the error, thanks for pointing it out. Unfortunately RUclips has removed the annotation feature have added a card stating correction in calculation.
@@Gadgetronicx i don't see the card
true
I know I am pretty off topic but does anyone know a good website to stream new tv shows online?
@Ezekiel Kole Yea, have been using Flixzone for years myself :D
you are the best one who did explain the pull-up and down resistor
Thank you, your voice and this video was lullaby for me and thank you, for keeping the music volume down so I can hear the important things you're talking about.
You’re welcome 😊
I agree! He did a good job on keeping the music volume down. He did a GREAT job explaining pull-up and pull-down resistors!
Ah very good sir ! 😀 You are a great teacher! I watched a few videos before your video but I couldn't grasp the concept. Now I understand. 🇦🇺👋🏻🤔👍🏻 thank you sir.
Terrible music, great explanation! Thank you!
If you have to choose a teacher for anything you need to know, choose an indian one ❤🌸
Ha ha thanks
This video needs a few million more views. Seriousy. Everyone else just says, pick a big one if you want to soft pull, and a small one for a hard pull. This gave us the reason, and the math, even though, as soon as you said it, I realized, I should have seen that before hand. But, you know, most people teach you these circuits with ideal circuits in mind, so I had never thought about the input making a voltage divider, because well, when most people teach you, they say that inputs take no current, or so little you can discount it.
While that is probably true most of the time, at least now I know how to properly pick a pull up/down resistor. You earned my subscription. I hope your channel does very well.
Thank you for your kind comment and subscription. Will continue to create more informative videos.
Great explanation and easy to understand! Keep up the good work! Thanks! You need to lower the volume of the background music to 10% of your vocal though.
This will be the best video, if u have avoided playing bg music👍
Thanks for the input Shiva
music too loud
Mahmoud Kortas Sorry will take this feedback :)
I never understood the use of music in those type of videos. It appears so pointless to me.
That and the speakers talks too fast. Not enough time for slow minded people, like me, to absorb the information.
@@mkaberli you can slow down the video speed in you tube settings, I always speed them up or down depending on delivery of the author
Nah it's perfect, just turn down the lights and bring out the neon sticks
Thank you ! This video explains the use and application of pull up / pull down resistor clearly.
Nice video you explain in a clear way the arguments thank you a thousand times👍
Great video/tutorial !! Thnxs for sharing ! Please turn the music a little softer for your next video.
Your video answer all my question about pull resistor...
Thx..
Glad I could help
You are a brilliant human being. This is by FAR the best electronics video explanation ive ever come across. Thank you very much!
Thank for your kind feedback :) Kindly subscribe to our channel
one of the best explanations, thank you... :) It 'll be even better if music was in low volume! Thank you again for this wonderful explanations.
This is the best explanation on youtube! Not only did you explain the problem - but also showed us how to calculate the different resistor values depending on the range of the expected logic level. Nicely done, Sir!
Despite of the music, the content is great
Thank you for explaining this topic in depth. :)
I had to watch a few times (I'm slow at learning new things), but I finally got it. Thanks!
Welcome :) Kindly subscribe to our channel for more of these tutorials
thanks sir for making this type of video it clears our fundamentals
Welcome :) Kindly subscribe to our channel for more of these tutorials
Great always confused, but got clarity with this topic
Happy to help
Nice vedio I was facing some EMI issues of false triggering of MCU becz i forget to put pull-ups in my switch input
Great content, but I really wish you could make the voice a little louder/clearer and the music more quiet.
Thanks for your feedback :)
This is a very good explanation but what it doesn't explain is that why there will be a drop of 1 volt?
Usually for voltage to drop to a certain extent voltage divider is required. In this case a current of 100uA with 5V means the current is limited by a 50KOhm resistance.
Hence if we want the current to remain 100uA, and a voltage drop of 1V, then we need a voltage divider of 10KOhm:40KOhm. The 40KOhm is assumed to be the internal resistance of the Gate. Then voltage drop will be 1V across the 10KOhm resistor.
Nicely explained. Thanks
Great Video and explanation
Great video, thank you for sharing
Cool edits and nice tutorial. Much helped!!!
Glad to hear!
This was extremely helpful!
Thank you
Wow .... I completely understood that. Great job !!
This was very helpful. Thanks very much
good tutorial man! but at 3:54, why is 3V and 2.5V combination an undefined state? Isn't this a logic high in TTL? or does it mean that induced voltage could vary rapidly and lead to 0.8-2.0V zone voltage?
Thanks for the explanation sir.
Found very informative, to the point explanation. Thanks once again :)
Super video,just I understood y to use pull up and pull down in a ckt after watching your video,great bro and thanks
Thank you Pavan do visit www.gadgetronicx.com for some other tutorials, circuits and projects
Can you reupload this video without the loud background music?
Great video
Thank you
informative video. Thanks
Nice video, thanks.
You are welcome :)
Excellent video... thanks.
Thank you. Nice but I get dizzy trying to follow the quick sequence. Probably aging effect.
Very clearly thank you very much. Is there a preference for pull up or pull down? With a pull up, the zerostate is to ground en with pull down you can calculate a small voltage?
Sorry couldn't get your question. Pull up mean to pull your logic pin close to vcc whereas Pull down mean to pull your pin close to ground
@@Gadgetronicx thank you
Fantastic video and explanation, nice job :D
Thank you very much
Great tutorial, thank you sir
Thank you. Kindly subscribe to our channel. For more tutorials visit www.gadgetronicx.com
Video feels like iam driving super car with music while I learning pull up resistor
Thank you I appreciate your hard work
You are very welcome
Excellent vedio.please Tell me which software you are using for making this amazing vedio
6:22 Why the input voltage of the gate is 4V? Across the resistor, voltage drop is 4V(40kohm * 100uA). I think the input voltage of the gate should be 1V. Am I wrong?
hello do i need pull resistor even if the signal input comes from another ic sending out clock signal...or just use the pull resistor when is a mechanical switch?
huh. that was actually really helpful
Thank you Atlas :) do visit www.gadgetronicx.com for some other tutorials, circuits and projects
The video was good and very effective,but could you please reduce the volume of the background music as it was quite difficult for me to listen to your lecture clearly... Thank you!!
Noted :) will improve in upcoming tutorials
Thank you very much for your video
brilliant tutorial...
Good tutorial
Great tutorial, even Software guys would be able to understand without much effort. Good job !
How will induced voltage of 3V on one input pin and 2.5V on the second pin (3:50) produce an undefined state. Earlier in the video you said that from 2V to +5V it should be logical 1, so why wouldn't this circuit produce a output of logical 1, rather than ending up in an undefined state?
Not something ...I learn lot of things from this video. Thank Thank You...
Thank You ❤️😊
Very good explanation. Now please treat yourself to a proper condenser mic and more importantly acoustic tiles and a compressor/limiter 🤣
Noted
good explanation
Thanks very much 🙏
Slow down, slow down.
You are too fast for non electronics guy.
Too loud background music.
Thanks for your feedback
You can adjust the speed, pause the video and rewind. If you want to learn from any RUclips videos then this is an essential skill. Genuine respect to you for learning. Now take a modicum of responsibility for that learning as well.
Can we apply this formulas for i2c communication resistors also? Or they are different?
Yes you can apply these formulas
Why are we using very high value of resistances ? Is it to avoid shorting through the resistors when the switch is in on state ?
Excellent explanation! Thanks a lot! But the background music is too loud
Thanks for the feedback. Will certainly improve in future videos.
Awesome explanation from 3:56
Glad you liked it
Can you calculate pull up/down register value for Arduino nano digital pin....it will clear better
Really helpful.. Thank you
Thank you, do subscribe to our channel. Visit www.gadgetronicx.com for more tutorials
next question would be ..
what is the condition required to switch on the pull down/high resistor
great tutorial
Thank you
Very useful and clear explanation. However, you should try to make ALL future videos without any background music. It is completely irrelevant and distracting.
Very good explanation; But Sorry sir with all due respect @0:35 not only digital circuits or I.C. even in analogue circuits and even I.C.
Nice appreciate the breakdown, great discoteca music too
Thanks
Tq u.. It was useful
Welcome :) Kindly subscribe to our channel for more of these tutorials
Thank you for this! It was very helpful!
I can't understand you over the music
nice explained
Thank you Sandeep :) Do visit www.gadgetronicx.com for more tutorials, Circuits and Projects
Excellenr explanation although as the rest the viewers comment music is too high! Music was nice tho to party I like it as much as the explanation damn...
thank you for the clear explanation, but the music was rly annoying and loud
Thanks for the feedback
Electrical engineering disco music is elite
Good content
I have doubt, How resistor will pull to +5V, they are not capacitor to hold current ? To pull to certain point of current from where they gain power ?
Superrr sir....thank you
Great video, i have a quick question so i have a raspberry Pi 3 and i connect the pull resister of 4.7k and to the I2C Bus i have 34 devices that works well, when i connect the final 6, i start loosing data over the bus, does this mean i can lower my pull-up resistor to 2.2k so that i dont encounter data lost?
Thank you sir
Thank you, do subscribe to our channel. Visit www.gadgetronicx.com for more tutorials
Loved the music
wow, nice explanation .... but why still low likes?
It's educational video or music video
Thanks you Bro.. Do more videos.
Sure Vijay will create more videos :) Do visit www.gadgetronicx.com for more tutorials, Circuits and Projects
why a short circuit is not recommended?
Much appreciated.
Good and informative video. Thanks.
Just remove that background music. Educational videos should not have those background songs. It distracts the viewers.
Very useful
Thank you :)
Your content is good,but please turn off the back ground music for the next video.
Sure will take this feedback.
Nice Presentation...
Thanks :)
Very well put thanks
Roosevelt f thank you :)
Much informative indeed!
But music distracts attention!
Thank you and we are officially removing background music from all our future videos.
@Gadgetronicx thanks for your useful content. If ı were in your shoes ı would consider adding captions to my videos.
Sure will do that in Future videos :)
The content of this video was great. However, the music was way too loud, distracting.
if you speak a little clearer this will be a very perfect video
Thanks for the feedback will improve it :)
but why do we need the resistor? Do we use it to avoid shortcut between the IO pin and the 5V? (but the IO isn't ground, so why?)