How a 555 Timer IC Works

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  • Опубліковано 1 лют 2025

КОМЕНТАРІ • 622

  • @HowToMechatronics
    @HowToMechatronics  4 роки тому +26

    I hope you enjoyed this video and learned something new! If you'd like to support me making more content like this, please consider supporting me on Patreon: www.patreon.com/howtomechatronics

    • @Sombre____
      @Sombre____ 3 роки тому

      You made the drawing yourself ? They seem really nice.

    • @bxeagle3932
      @bxeagle3932 2 роки тому +1

      555 comments i dont want to ruin it

  • @Dakseru
    @Dakseru 6 років тому +32

    This actually made me feel like I understand electronics and will allow me to understand what pins what and what the 555 does and how it does it for my A level studies, thanks a lot!

  • @tubegor
    @tubegor 4 роки тому +115

    This year 555 Timer is celebrating its 50th birthday, my congratulations. Half a century in electronics is all eternity.
    Explaining how it works great done. 👍(ツ)❤️

  • @hoofheartedicemelted296
    @hoofheartedicemelted296 3 роки тому +3

    I had to slow the playback to 0.75 and it gave me a greater amount of time to absorb this information. I'm a noob. But this stuff is fascinating, I can't think of any other word for it. Sir you are an excellent teacher. Thank you.

  • @insertusername5737
    @insertusername5737 7 місяців тому +3

    Finally someone explain that the capacitor is the key for changing the output state in the astable mode, other videos just throw formulas at your face and just skip the key of the thing with some "you just suppose to know that" vibes, what a shame.
    Appreciate it!

  • @NicStage
    @NicStage 5 років тому +12

    This is the best description of a 555 timer I've found so far. I'm learning this stuff and your video was really helpful. Thanks!

  • @kevinbyrne4538
    @kevinbyrne4538 7 років тому +117

    Although I was already familiar with the 555 timer IC, I liked your presentation. Clear and concise.
    Also, congratulations on your English. I wish that I could speak a second language as well as you do.

    • @ShelliLoop
      @ShelliLoop 5 років тому +2

      Kevin Byrne - congrats are - extremely - premature. Really, pal, why would you say this? He is very difficult to understand now and of you tell him he is “great” talking english, he might STOP trying to improve. In this way you actually HURT his progress.
      This guy has very good content and the right ideas about teaching, but still need to improve English
      A LOT.

    • @ravplayztabla7467
      @ravplayztabla7467 5 років тому +13

      @@ShelliLoop wow you're stupid af.

    • @SqualidsargeStudios
      @SqualidsargeStudios 5 років тому +1

      S H i agree, the English is shoddy and needs work.

    • @jovetj
      @jovetj 5 років тому +6

      I agree with Kevin. I already knew most of this, but it is an excellent video. The 555 timer is a "killer app" example of an integrated circuit. It's simple, elegant, and versatile!
      The criticisms of his English are unfounded. His English is very good. His accent is still very strong, but I had no trouble understanding him. Accents only go away with time and exposure to native speakers, which not everyone has access to.

    • @themightyimp08
      @themightyimp08 5 років тому +1

      @@jovetj yup, the 555 timer, along with a 566 chip, form the sound of the 2 flying saucers on Atari arcade Asteroids. It really is used in a ton of stuff.

  • @WhoWantsToKnow81
    @WhoWantsToKnow81 5 років тому +13

    Absolutely beautiful explanation of a 555, the best I have seen so far. I'm very glad I came across your channel!
    I also made a flip-flop with NPN transistors in a NAND configuration, that was fun :)

  • @new-knowledge8040
    @new-knowledge8040 4 роки тому +3

    HOLY CRAP. The 555 timer is still around ! Amazing. I was using it about 44 years ago.

  • @bahtiyar.bayram
    @bahtiyar.bayram 7 років тому +303

    The best explanation of 555 timer...

    • @michgingras
      @michgingras 6 років тому +10

      yea when you already know what he is talking about , then again you don't need much explanation don't you ?
      That guy is an idiot, he described the chip for 10 minutes without even saying what it is about and or what he is talking about.
      PURE RUBISH

    • @petedavis7970
      @petedavis7970 6 років тому +5

      @@michgingras Where's your amazing content?

    • @johnnythi
      @johnnythi 5 років тому +4

      @@michgingras something tells me you cut yourself.

    • @furrane
      @furrane 5 років тому +6

      @@THE16THPHANTOM I didn't know how it works and now I do. You being slow to understand doesn't mean the guy did a bad video, it just means you're slow.

    • @THE16THPHANTOM
      @THE16THPHANTOM 5 років тому

      @@furrane
      OK, boomer.

  • @MaxImagination
    @MaxImagination 2 роки тому

    Well-explained in a concise and understandable manner. Thanks to you I built a much clearer understanding of the 555 timer and how it works. Excited to make more NE555 projects without my usual hiccups in lack of knowledge. Cheers to you, man!

    • @tatvamkrishnam6691
      @tatvamkrishnam6691 2 роки тому +1

      6:48 If anybody who reads this is curious how to derive that t=1.1*C*R result, its simple.
      capacitor
      --------| |--------
      | |
      | \
      | / resistor
      | \
      | /
      | |
      | __ Vcc __|
      constant Dc
      dq = i dt
      i = dq/dt
      Using Kirchoff's law,
      q/C + R i - Vcc = 0
      R (dq/dt) = (Vcc . C - q) /C
      dq/ (Vcc - q) = dt/ CR
      Apply integration on both sides with limits LHS.. from 0 to q, and RHS..from 0 to t.
      then you will get,
      - Ln ((Vcc .C - q) / Vcc .C) = t/CR
      From this we can easily get this result, i.e
      q= Vcc. C (1- e^(-t/CR))
      since q=CV,
      V = Vcc(1- e^(-t/CR))
      Now apply V= 2/3 Vcc in this formula,
      you will end up with t= ln(3). C. R
      [ln(3) = 1.0986 = 1.1(approx)]
      Happy learning!

  • @curiosity551
    @curiosity551 6 років тому +36

    Graphics make it explain better. Thank you for such a useful video!

    • @Decco6306
      @Decco6306 5 років тому +1

      verry much yess

    • @cryptocsguy9282
      @cryptocsguy9282 3 роки тому

      @Rishikesh upload more electronics videos 📹👀

    • @curiosity551
      @curiosity551 3 роки тому

      @@cryptocsguy9282 sure!

  • @maffysdad
    @maffysdad 7 років тому +1

    That was one of the best 555 tutorials I've seen in ages, and the graphics both on the chip and at the right side made all the difference to helping understand it... Thank you so much!

  • @ra226gaming
    @ra226gaming 2 роки тому +3

    Excellent explanation of the 555. I usually prefer still images/text over video, but in this case the video and the animations were fantastic and really make clear how the device works. Also loved seeing the block diagram of the actual schematic with the different parts highlighted.

  • @taoufikkalfat7826
    @taoufikkalfat7826 2 роки тому

    this is the best video in the world that i have seen explaining how the 555 works. thank you very much for this easy and very very clear explanation.

  • @knowall5792
    @knowall5792 7 років тому

    Though, as a rookie, I didn't fully understand the video, I give the video a perfect 10. I have to come back to your site again and again, as my knowledge picks up. Subscribed already. Thanks.

  • @calyodelphi124
    @calyodelphi124 7 років тому +13

    I have to sya, this explanation of how the 555 timer works is beautifully done. It's simple and clearly illustrates what's happening internally. I definitely learned a lot more with this than I did in previous 555 timer videos by other EE youtubers.

  • @stephenwilliams5201
    @stephenwilliams5201 5 років тому +9

    Every" band " needs a drummer. ( 555) And this is good way to" educate " folks tks for the Good show.

  • @NicleT
    @NicleT 5 років тому

    Best explanation on the 555 timer to date.
    Thank you so much. This channel is one of the Internet’s gem.

  • @85ryankelly
    @85ryankelly 4 роки тому

    The best explaination that I have seen. Read the book on the 555 timer and this just makes it all make sense now. Thank you.

  • @yoramstein
    @yoramstein 4 роки тому

    Great videos by Dejan Nedelkovski. Very proffesional. Clear English and every word to the point not too much bla bla like by others.

  • @akashrenigme5709
    @akashrenigme5709 Рік тому

    Slow and a kid can understand with a explanation like this. For the channel creator : students shall appreciate if you could continue this

  • @prasad3071
    @prasad3071 Рік тому +1

    I don't think there is a better explanation than this.Thank you very much for your effort.🤟

  • @SobhitPanda
    @SobhitPanda 3 роки тому

    You are actually Awesome! You are an inspiration to me. All the best and reach heights! Love from a lil Indian UA-camr.

  • @PatrickKrolickoff
    @PatrickKrolickoff 4 роки тому

    Thank you for the best explanation of 555 timer working. Since I'm from Russia I understood you very well. Best regards, Mike

  • @GamingFloppaYT
    @GamingFloppaYT 10 місяців тому +33

    wait but its not walking

    • @deepaknanda1113
      @deepaknanda1113 7 місяців тому +5

      Wait some more...it will😅

    • @topiuusi-seppa5277
      @topiuusi-seppa5277 7 місяців тому +6

      I got that reference 😆👌

    • @wlyiu4057
      @wlyiu4057 4 місяці тому +2

      You need to place it on a very, very long breadboard.

  • @cavanaughsgarage
    @cavanaughsgarage 5 років тому

    this has to be the best explanation of 555 timer ever, the internet needs more vids like this. I need to find the DC motor control tutorial referenced towards the end of this video

  • @panchosmar
    @panchosmar 6 років тому +1

    The best explanation about the 555 I have seen so far, and with the graphic animation that is simply wonderful, my sincere congratulations. Shared

  • @JohnLeePettimoreIII
    @JohnLeePettimoreIII 6 років тому +5

    I've admired and used the 555 (556, and 558) for decades. Your video was very well made. Thank you.

  • @orlandoarriaga7148
    @orlandoarriaga7148 6 років тому

    Just made a 555 timer on a bread board and this video really helps me connect both ideas together and now I fully understand, awesome presentation (edit: by making it I meant making the inside of a 555 on a bread board)

    • @HowToMechatronics
      @HowToMechatronics  6 років тому

      That's cool, I'm glad you found this video helpful! :)

  • @claytonbenignus4688
    @claytonbenignus4688 6 років тому +22

    I am going to review this video several times. I would also like to see him do the LM386 Chip.

  • @ccv3237
    @ccv3237 6 років тому +1

    Congratulations my friend! This is the best IC555 explained video I have seen.
    Thank you very much for such a great detailed and well explained video.

  • @justincrissman8981
    @justincrissman8981 5 років тому +3

    best 555 timer video i could find. subscribed

  • @hitts8928
    @hitts8928 4 роки тому

    it took ages for my professor to explain the NE555 while this guy explained it even clearer in just 10mins 😆😆

  • @HillCountryDemo
    @HillCountryDemo 4 роки тому

    The best tutorial on the 555 timer on all of UA-cam!

  • @marcopilati7464
    @marcopilati7464 3 роки тому

    best explanation ever seen. Great! Thank you!
    (really lovely, your Russian-American accent!)

  • @rpsproject5349
    @rpsproject5349 7 років тому +5

    That is the best explanation of the 555 that I have seen yet.

  • @gezhagnteramedew5086
    @gezhagnteramedew5086 2 роки тому

    Their is no word other than PERFECT to this video

  • @theemanuel472
    @theemanuel472 4 роки тому

    This is the best explanation about 555 timer ever, but I need one more thing, the demonstration for this two formulas (TH and TL). I need a video to understand how to get these two from capacitor charge and discharge equations.

  • @agaxent6200
    @agaxent6200 4 місяці тому

    nothing beats this Video to get me fast asleep, good for insomnia..

  • @migalito1955
    @migalito1955 5 років тому

    Excellent explanation of 555 IC. Nothing was left out and the graphics were superb!

  • @JohnnyJTav
    @JohnnyJTav 6 років тому +20

    The Most versatile IC ever Devised...

  • @liveen
    @liveen 3 роки тому

    So many youtubers nowadays making videos on electronics in such a way that I assume it'll be for beginners, but I literally understand almost none of what's going on, despite not being completely beginner (i know how resistors, transistors, capacitors etc works and have built a couple tiny supersimple cirquits on a breadboard)

  • @anjithajyothikumar7114
    @anjithajyothikumar7114 4 роки тому

    Best content on 555 I've come across! Thanks a bunch!

  • @AtomkeySinclair
    @AtomkeySinclair 7 років тому

    I've used them for years and never really took a look that far into the internals. Nice work.

  • @Cassandra_Johnson
    @Cassandra_Johnson 7 років тому

    Best 555 video I have seen here, bar none.

  • @ddee2501
    @ddee2501 7 років тому

    The best explanation of 555 timer i have seen yet....well done !

  • @shubham709
    @shubham709 4 роки тому

    thank you for this video best explanation of the working of 555 I have seen till now

  • @nunomaster
    @nunomaster 5 років тому

    This is without a doubt the best explanation i found of a 555 timer. Thanks!

  • @carlittle_
    @carlittle_ 4 роки тому +1

    This is the best explanation ever.

  • @Driftload
    @Driftload 6 років тому +19

    Very well explained video, I am an electronics noob but I think I understand the modes to an adequate extent now.
    One thing though - it might be capacitor fundamentals but in *astable* mode how comes the input voltage (to the entire circuit) doesn't stop the capacitor from discharging?

    • @HowToMechatronics
      @HowToMechatronics  6 років тому +4

      Thanks. The capacitor is discharging because in that case the discharging capacitor is active, meaning the the VCC is connected to Ground via the R1 resistor, or if there wasn't a capacitor the voltage at R2, C2 or the threshold and trigger pins would have been zero.However, the voltage is not zero because the capacitor was charged and now is discharging from those 2/3Vcc until 1/3VCC.

    • @manojkm9219
      @manojkm9219 6 років тому

      Scott Anderson led complants

    • @RichardHowin
      @RichardHowin 5 років тому +1

      Addition to How To Mechatronics, Current is easily flow to the discharge because there's no resistance (very minimal resistance) at the discharge transistor vs R2 that have some value of resistor. So VCC get attract to discharge transistor easily ._.v

    • @hengpong1561
      @hengpong1561 5 років тому +1

      ល្អ

  • @NareshKumar-we6sc
    @NareshKumar-we6sc 3 роки тому

    One chapter half syllabus was covered in just 10:43 minutes...take a bow👏🤝to your explaination..

  • @cw4608
    @cw4608 4 роки тому

    The explanation and graphics are excellent! Thank you for taking the time to create this tutorial on the 555

  • @codym627
    @codym627 2 роки тому

    Amazing video!!!!!!! This is a hard to explain topic but you did it so well!

    • @HowToMechatronics
      @HowToMechatronics  2 роки тому +1

      Thanks, glad it was helpful!

    • @codym627
      @codym627 2 роки тому

      I just discovered your channel and it is awesome! You are great at explaining stuff!

  • @blogtodeath4736
    @blogtodeath4736 6 років тому

    A very well made and easy to understand video, unlike most of the hobbyist garbage on UA-cam!

  • @gembagemba7207
    @gembagemba7207 5 років тому +1

    You are the best brother 👍

  • @mandarbamane4268
    @mandarbamane4268 Рік тому

    This helped me on college presentation, thanks a lot!

  • @thecraftsman8083
    @thecraftsman8083 5 років тому +2

    Most efficient tutorial of this topic!

  • @DINESHCO
    @DINESHCO 5 років тому +1

    The best explanation how 555 works..well done and thanks

  • @eanliyo973
    @eanliyo973 4 роки тому

    Explanation is very much clear

  • @marcturcotte3013
    @marcturcotte3013 6 років тому +1

    Jackpot !!! This man knows how to communicate its knowledge.
    Those are the explanations I was looking for.

    • @HowToMechatronics
      @HowToMechatronics  6 років тому

      Thanks!

    • @triodit
      @triodit 6 років тому

      bullshit he told use how to make a switch that unbelievably fucking useless.

  • @ethansprojects7399
    @ethansprojects7399 Рік тому

    You are a great teacher!

  • @joshpatterson2140
    @joshpatterson2140 7 років тому

    This is the best electronics video I have ever seen. Man, I wish i could tip you!

  • @stevenelmes8361
    @stevenelmes8361 4 роки тому

    The best explanation i have found so far!

  • @professoreggplant9985
    @professoreggplant9985 5 років тому

    Best explanation from a functional level. You should do one from the perspective of the component level now instead of the functional level. I can't find any that walk through the individual transistors, diodes and resistors that make up the circuitry.

  • @adp9926
    @adp9926 6 років тому

    What did I just watch? I have no idea at all what you were talking about but probably because I have no knowledge at all about this stuff... seems like you still did a good job at explaining according to the others

  • @markfinn825
    @markfinn825 4 роки тому

    You did good. I am beginning to understand the 555 IC. Some memorizing and I will probably understand it well enough to use it in adapting my very own relay logic calculator design to integrated circuits to a build project rather than only a drawing. Thus I will be one step closer to losing my lunatic reputation some of which was gained by boasting about my half baked IC projects of about 31 years ago at a local tavern.

  • @ifmohammed6495
    @ifmohammed6495 6 років тому

    You are the best. your explation is very simple and easy and it is very good

  • @AaronB99999
    @AaronB99999 4 роки тому

    Wonderful explanation. I was able to replicate all three on a breadboard fairly easily. First time I was able to get a 555 to do anything.

  • @thidassankaja8039
    @thidassankaja8039 7 років тому +17

    Please do a video series on electronics basics.

  • @BertGrink
    @BertGrink 7 років тому +75

    I think the only other IC that can possibly rival the 555 as being the most sold is the 741 Op-Amp IC.

    • @marwansamy2
      @marwansamy2 7 років тому +2

      That's true but 555 is the one being more sold than 741, but they are pretty close

    • @two_number_nines
      @two_number_nines 6 років тому +3

      why lm741 tho? lm358 is much better-cheaper and contains 2 in a single package

    • @BertGrink
      @BertGrink 6 років тому

      John Scarce I was not talking about quality, but merely about sales figures, where i think the 741 is by far the most sold opamp of all time.

    • @two_number_nines
      @two_number_nines 6 років тому +3

      people are stupid and we have to spread the word about lm358 more then

    • @joewoodchuck3824
      @joewoodchuck3824 6 років тому +2

      The 741 is as obsolete as an early dinosaur. Why people still design with them, why any sellers carry them, why magazine editors publish circuits using them, and why they're even still made is a complete mystery in a technical world moving forward and hopefully not moving backwards.

  • @TheVagueIdeas
    @TheVagueIdeas 4 роки тому

    Your explanations are really top notch, thanks for making these videos!

  • @mattantonelli4273
    @mattantonelli4273 2 роки тому

    An absolute genius

  • @clex2349
    @clex2349 6 років тому +4

    I needed this like a year ago, good job.

    • @BradCozine
      @BradCozine 6 років тому

      Well, now that you've watched this, go watch Primer then get to "makin'"!

  • @peterdenes6353
    @peterdenes6353 5 років тому +2

    Wow..you make this sound super exciting, even though I hated this subject at my uni :D

  • @drengrd
    @drengrd Рік тому

    Wow... Well explained but I am lost on the examples 😁👍

  • @xila8861
    @xila8861 Рік тому

    Man, this was insanely detailed

  • @Carlusha919
    @Carlusha919 3 роки тому

    Excellently explained!!! The best! Great dynamic diagrams too. Thank you much.

  • @pauliukzz
    @pauliukzz 2 роки тому

    Thank You for explanation, everything Perfect!

  • @waqaswani2994
    @waqaswani2994 6 років тому +4

    Beautiful explanation thank you very much

  • @josedominguez2021
    @josedominguez2021 6 років тому +2

    Ahora si entiendo como funciona el 555.
    Si sabes de flipflops.
    De comparadores.
    De resistores pull up y pull down.
    De buffers.
    De divisores de tension.
    De circuitos RC.
    De transistores NPN.
    Si sabes de lo anterior???
    Sabrás como funciona el 555.
    Thanks a lot for this super video.
    Desde guatemala saludos.
    See u at next vdo.!!!!

  • @josedominguez2021
    @josedominguez2021 6 років тому

    The BEST VDO ABOUT 555 INTEGRATED!!!!
    El mejor vdo sobre el 555 de toda la red!!!
    Quinientas Cincuenta y Cinco Gracias!!!

  • @Ther3IsN0Sp00n
    @Ther3IsN0Sp00n 3 роки тому

    Wonderful video, I love the way you explain things and the animation really helps 👍

  • @pavanpratapsinghchauhan6804
    @pavanpratapsinghchauhan6804 4 роки тому

    Beautiful explanation 😃😃

  • @slordmo2263
    @slordmo2263 5 років тому +3

    Yes, a classic I.C. ..... it's interesting.... there are quite a few 'variations' of this chip now.... in all the logic types....TTL, CMOS....etc, and package types....even surface mount.... (and care must be taken, too) The input/output specs have changed quite alot too. One of the big selling points of this chip is that it is 'Modular'...meaning that each subsection could be used in 'different' ways.... (window comparator, SR Latch, Output Driver, Open Collector Driver, etc.) an engineer could use those blocks to get the 'function' he required... There was another IC from the 70s that was 'modular' oriented.... originally a linear power supply chip...the LM723... had an op-amp, error amplifier, voltage reference output, output driver, etc.... could be used in various ways... now most chips are either ASICs or pre-programmed microcontroller , they have their place...but the these old chips could be used, without having all the overhead of a micro.... just 1 man's opinion....

  • @Tasty_sand
    @Tasty_sand 4 роки тому

    good explanation and presentation. I just wish there is a pointer or marker which points at what you are saying.

  • @Camper721
    @Camper721 4 роки тому

    Great video. I remember this from school in the 90's.

  • @lyf7835
    @lyf7835 4 роки тому

    Thank you for help me fully understand!!!Your explanation is very clear!

  • @larsholst7221
    @larsholst7221 6 років тому +1

    Very good explanation. In detail and easy to understand.

  • @AyobeTech
    @AyobeTech 7 років тому +5

    Thank you for this simple explanation

  • @harshachittu
    @harshachittu 6 років тому +3

    Great explanation and presentation is beautiful....
    Thanks a lot....🙏

  • @scaslx
    @scaslx 5 років тому

    I regret for not watching this video more earlier!

    • @jovetj
      @jovetj 5 років тому

      ("I regret not watching this video sooner!")

    • @HighestRank
      @HighestRank 4 роки тому

      Jovet lesser late*

  • @mbaker335
    @mbaker335 6 років тому

    Brilliant explanation. Very clear indeed.

  • @ChupoCro
    @ChupoCro 7 років тому

    Stvarno dobro objasnjeno! Explained really well!!

  • @sajjadkarami872
    @sajjadkarami872 5 місяців тому

    so simple, so nice. thanks

  • @FeedehC
    @FeedehC 5 років тому +2

    Wonderful! You have gained a new sub, please keep up uploading this quality content, you will success. Thanks a lot, greetings from Argentina.

    • @HowToMechatronics
      @HowToMechatronics  5 років тому

      Thanks!

    • @ShelliLoop
      @ShelliLoop 5 років тому

      Federico Coronati - why are you here? Don’t you talk “Mexican”?

  • @spacial2
    @spacial2 7 років тому

    This really is an excellent explanation.

  • @benslimaneyoucef9422
    @benslimaneyoucef9422 2 роки тому

    Absolutely beautiful work, thanks Sir for your effort

  • @newtron762
    @newtron762 5 років тому +1

    i have already designed my own 555 timer IC using bjt transistors, i derived all the equations even the FM modulation equation.

  • @김준형-m2y
    @김준형-m2y 5 років тому +3

    I just want to tell you " thank you so much!!"