How a 555 Works as a Timer.
HTML-код
- Опубликовано: 22 июл 2024
- In this video I explain the building blocks of a 555 chip and how it interacts with the components you connect around it to become a “Timer”!
I talk through each stage of the 555 including
- Voltage Divider (comprising of three 5K resistors)
- Two Comparators
- The Flip-Flop
- NPN and PNP Transistors utilised for Discharge and Reset
We explore the Charge and Discharge times as the capacitor oscillates between the 1/3rd and 2/3rd voltage levels and verify that with an oscilloscope.
If you are interested in the handy configurable Resistor boards I utilised you can purchase them from Amazon here:-
amzn.to/3RYiX75
For more information about Voltage Dividers, see one of my previous videos here:-
• What Are Voltage Divid...
Timeline
-----------
00:00:00 - Introduction
00:00:59 - PKAE Electronics Intro Theme
00:01:09 - Internal Stages starting with Voltage Divider
00:02:29 - Two Comparators
00:04:16 - Control Voltage Pin
00:04:32 - Flip-Flop & Output Driver Stage
00:05:40 - SR Flip-Flop Explained
00:07:27 - NPN Discharge Transistor
00:07:50 - PNP Transistor for External Reset
00:08:14 - Summary of Stages
00:08:39 - Comparator/Flip-Flip Experimenting (Theory)
00:15:54 - Comparator/Flip-Flip Experimenting (Bench Testing)
00:17:58 - Astable Circuitry - External Capacitor and Two Resistors
00:21:20 - Bench Testing Astable Mode
00:22:48 - Datasheet Astable Circuit Diagram
00:23:27 - Control Voltage Capacitor (Stability)
00:23:53 - Timing Calculations (On and Off Times)
00:25:41 - Bench Testing Timings with Oscilloscope
00:29:06 - Timing Summing Up
00:29:17 - Frequency Calculation
00:30:12 - Wrap Up. 
Наука
Back years ago when I taught myself electronics I bought one of the multi purpose board kits you can use to make 200 or so projects.
When I played with a 555 that was the most amazing chips ever. Make timers to turn on and off at different times.! Once made a timer that took a month to turn on. After calculating the resistance and caps it was put in the living room and did nothing. Just sat there waiting to trip on. The wife thought I lost my mind. One Saturday about 4pm it came on. The timing was about 6 hours different from what I calculated. But, it was amazing a $1 circuit went off that close after 32 days. And I made it do that! The wife really thought I had lost it then. 😂
Haha! Brilliant! that made me laugh, thank you.
Your timer was 99.24% accurate. Well done. Your wife does not deserve you.
@@dougtaylor7724 In the late 70s a colleague did a industrial controls dosing pump driver which used a simple RC timer with insane long period and being inexperienced, he didn't realise after it left assembly line no one in Functional Test wanted to wait a week ten days whatever it was. So the boss had to change the timer to something actually measurable and added a CMOS divider IC patched under PCB. We called the guy The 555 Kid after that.
It is normally not a good idea to try and make very long delays (say greater than an hour) with a 555 directly because leakage in the capacitor tends to dominate the operation at such low charging & discharging currents, and the circuit is very sensitive to noise close to the comparator trip points. Adding a divider (as also suggested) makes operation much more dependable. Still, I had great fun s a kid learning these things for myself!!!
Fantastic...
ya u can do all kinds of fun stuff with just a very few chips...
PLEASE I am BEGGING explain op amps like this. I feel like a BARELY understand them and this video made me feel like I can explain a 555 to a toddler!!
Hi. Yes, an Op-Amp explanation will be essential content for my General Electronics collection. It is on my long list to do.
I think this is an excellent explanation of op amps, at least when they don't have any direct feedback loops. Op amps get weird (and interesting) when there is a feedback loop involved.
I can't remember who explained it or even the specific circuit configuration, but when the feedback loop is involved, "the opamp will do as much as it can to equalize the input voltages" and that's what stuck with me.
I look forward to Paul's explanation of opamps because I think it'll be even more clear than that.
@@JamesHarr challenge accepted 😲
@@JamesHarrThe way that I learned op amps was that the op amp has variable gain internally and through magic will change the output voltage to make the two inputs equal. Then assuming the two equal inputs, you can find the desired output voltage. Slap on a capacitor or inductor and you now have an integrator or differentiator
It’s exactly this kind of thing that we dreamed the internet would do for us - let people freely share their talents and knowledge with each other. Great explanation and video! Taking the time to briefly explain how the comparators worked and how the flip-flop worked is the exact kind of thing someone who doesn’t have natural teaching ability would have skipped completely.
You just have to wade through the ai generated fake videos, completely lose your privacy to multiple gigantic corporations and be completely unsure if your even talking to a real person since 25% of Internet traffic is scammy bots and another 25 is supposed good bots
Thanks. I find sharing knowledge to be very rewarding. All your comments make the effort all worthwhile.
Word!
This is the best explained 555 timer video ever. I understand what it does already high level and how to figure out the numbers but I have never seen all the internals so completely discussed and stepped through like you did. Brilliant work! Absolutely love electronics so throughly explained with real world results like this. Keep it up! And thank you for a more indepth understanding.
Many thanks for your great comment.
I agree
I've been doing electronics as a hobby since the late '80s and read many articles on this IC
Today I understood, for the first time, why a 555 can't give perfectly symmetrical square waves
@@qlue7881 thanks for the comment.
A video on how to achieve 50% (or higher) duty cycle is coming, if that's what you mean.
😊😊👍👍🙇🙇🙇🙇🙍🏾♂️❤😅❤❤😮
this is the first time this chip has ever made sense to me, i never understood what it was doing inside. it was always explained to me as how to *use* it, not how it *works*. thank you so much!!
That's Great!
More videos on the 555 coming, so make sure you Subscribe. 😀
@@paulpkae oh this was an insta-subscribe for me, you've solved something that's been a mystery at the back of my mind since the '90s, where i felt like it was just my fault for not getting it. and i just never realised it could actually make sense
I am 61 an I am used the chip when I was 17. Didn‘t know this chip is still around. Nice!
It’s still all over the place.
Still going strong and now manufactured by many companies and in various form factors, TTL, CMOS. There's even a dual 555, namely the 556.
60 y. o. here... same.
Designed and built a digital clock around it at 15. With the additional 74something nand gate ttl chips, it
had the accuracy of 1 min per hour,
and drained C batteries in a couple of hours...
Of course it is still around! I've got a bunch of them in my drawer of digital chips, along with my TTL and CMOS series chips. I first started tinkering with this chip from the TTL Cookbook, author Forrest Mims published by Tandy/Radio Shack. I've still got my copy of that book along with a bunch of chip pack cardboard "data sheets" stapled to the inside cover of of this book. Back in the 70s/80s, getting data on chips was hard. You kept those precious package data backs, and was very familiar with the Reader's Guide to Periodic Literature, and microfiche film at libraries to get data. Now it is just a Google search away, or a visit to Digikey! Technology has made some things easier.
I am 31 and getting started into electronics. This chip is very useful and cheaper than programming and Arduino
This might well be the best explanation of an electronic component I have ever seen. This is "Electronics for Dummies" which is exactly what I need. I just went to his main page hoping and praying that he had a complete "Learning Electronics" tutorial but alas...😥
More like electronics for someone who is casually familiar with how electricity works. If someone was truely uneducated about any electrical theory, this video would be useless. That being said, this video explaining a 555 timer is better than any other video I have seen on the subject.
Hi thanks for the comment. My channel is quite new and small at the moment, but I have much bigger plans for it. and any more videos will be coming.
Please make sure you Subscribe if you want to support. Thank you.
@@robr4662 thank you.
@@paulpkaeSubscribed, thank you!!
I designed circuits using 555 timers back in the late 80’s. Thanks for the memories! BTW the 556 is twice the fun 😊
Thanks, glad you enjoyed it.
this is honestly the best explanation I have seen on the 555 and its operation. The explanation + visuals + calculations + breadboard + scope with comparison = awesome. I like that math!
@@techtopics5782 thanks.
People say it wasn't named after the 5K resistors because that's what the inventor of the 555 said in an interview. It was named by a marketing fellow who thought "555" was catchy.
Brilliant video, BTW.
Yes, I have heard that too, but for me it seems too co-incidental.
Thanks for the comment.
Maybe the marketing fellow saw the schema and got the idea.
Brilliant video. I was surprised that I could watch this length of video on the venerable 555 and not find my mind wandering. It's a testament to the ability to teach and keep people engaged in the content.
I really appreciate breaking down the pins and how they are related without just glossing over why a given pin is connected to a specific point in the circuit. The color coding of the internal and external voltages along with the logic level changes definitely made it easier to follow what was going on.
Bonus points for building up the bench demo from a couple LEDs to the oscilloscope traces that took the diagrams from a simulation to the real world.
Thanks for your comment. It took quite some effort to put this together to be honest, but I am please with the outcome, especially all the comments like yours. Please remember to Subscribe, if not already. 😁
Adding my voice to all the others...absolutely brilliant job explaining and demonstrating the 555 timer.
Glad you liked it!
I think this is the best video about how a 555 works I've ever seen.
Thanks so much.
i once worked for a small company whose main "electrical engineer" only knew relay ladder logic. I designed a simple 555 circuit operating in a sequence to signal solenoid air valves to open to blow dust from a multiple dust bag system into the waste bin. Worked like a champ. They thought it was the cat's meow.
Brilliant!😄
Never see a video about 555 well explain. Amazing. Keep me on screen to understand this chip, and how they work.
Glad it was helpful!
your addition of the color gradients was a real game changer for me. thanks for this. Well done!
Thanks. An additional bit of effort can make a lot of difference.
That was an enjoyable trip down memory lane :) I once met a very excited chapin the gents of a Southampton pub who had designed the timer circuit for the hot air hand dryer using an NE556 and for some reason, he really wanted to explain the circuit to anyone who would listen.
From my experience, those hand dryers must have the wrong size capacitors in them then . 😆
I used one of these for a 1Mhz clock on a 6502 board I made. It worked just fine. Nice description, very thorough.
Very nice!
Ok now it makes tenfold more sense to me why it's called a 555, genuine surprised i haven't heard anyone explain it till now, and that everyone calls it a "timer" chip.
Great in-depth video on the 555 in astable mode. A follow up video could cover monostable mode. This would explain why the designer of the device didn't just connect trigger and threshold together inside the chip.
Thanks for your comment. I do intend doing some follow up videos to this.
My very next video however is going to be a review of a nifty digital microscope.
Commenting before I watch the video. Bet it's going to be how the 555 is really a dual comparator with some nifty tricks. The "timer" bit comes from how long it takes to charge/discharge a capacitor to a specific value. It's been years since I've worked with one though, so this is pure memory and speculation.
I should also note that using similar circuits, you can measure voltage by using it as a voltage to frequency converter, then measuring the frequency. With the beautiful part being the final measurement circuitry can be optically isolated!
Really well explained. This must have been one of the most " mysterious" circuits I came across when I was a youngster!
Thanks. Glad you enjoyed.
like in the comments already i to never saw a video so well explaned about an electronic divice. fantastic. i wish more people would do it like this on more components or cicuits. its fantastic for biginners and hobby. thank u so much.
thanks so much for your comment. I'm glad you found it useful.
A Masterpiece for electronics engineering teaching. Bravo!!
Wow, thanks!
What an amazing video. I have watched probably 2 dozen 555 videos recently, none are better than this. Visuals are great. Was also a very good explanation. You managed to make an entertaining and informative video on something that already has a lot of videos on it but with a unique and useful twist. E.g. I never took the time to figure out exactly how the astable mode works, and I'm very glad you walked me through it here. I haven't seen anyone else do that, and I'm glad you did. I cant wait to see see your other 555 videos that you mentioned at the end. Thanks for sharing.
Many thanks for your comment. More videos coming......
I remember using the 555 on a game that I made, forty years ago, to win my school science competition. Amazing how long they (and me) have been around.
Great description and video!
555 was developed by Signetics founded by some former Fairchild Semiconductor Engineers (like Intel was). I worked at National Semiconductor (just around the corner from the Signetics Plant) and we called it the "Triple Nickel" at least in our department(Test Engineering) when NSC decided to second source the 555. Still have a Signetics Apps Book on my bookshelf and a very useful chip when the only option was a bunch of TTL Logic to do timing when you could get away with only a few external components back in the day.
Thanks for the comment and your interesting history insight.
Thank you for this explanation and demo! I only really learned how to do microcontrollers with electronics so finding out other uses for simpler components is useful. One use for the 555, instead of a capacitor and voltage divider, you could use a thermistor to vary the threshold voltage based on temperature and tie the output to a relay to turn on a heater, you have made a simple bang-bang control loop.
Thanks.
It is worth mentioning that the Control Voltage *pin, #5, is also known as the Pulse Width Modulation pin.* I have had great fun playing with that function, even turning a CMOS 555 into a Digitial Mode audio amplifier with pin 5 as the audio input! A couple of extra components are needed beyond the usual few for a simple timer: an external transistor to make the duty cycle 50% ON and 50% OFF, plus an inductor to knock out the high frequency elements of the output signal, and a small capacitor on pin 5 to give DC isolation from the audio source. I set the oscillation frequency to be 2 MHz, which is only possible with the CMOS 555. That meant each wave of the audio input was _in effect_ 'sampled' 100 times (for 20 kHz audio), and 100,000 times (for 20 Hz audio), giving high fidelity to the *_implicit_** A-to-D conversion* and to the audio output. 🙂
Thanks for sharing your knowledge.
First time you've shown up in my feed. Your explanations and presentations are so good that I've subscribed!
Brilliant! Thanks for subscribing.
Wauw, even though there are over 300 reactions telling you this is the best explanation ever seen, I'll just add another one. What a great explanation, one of the best 30 minutes on RUclips :-). Thank you for sharing, I've subscribed!
Great! Thanks for watching, the comment and even more for Subscribing.
Loved it. Took me back to my teens in the 80s. I never understood it then tho. More like this please
Thanks for the comment. More videos coming....
I love the 555 many applections think out side the box!
The NE555 bipolar timer has an output stage that produces a significant spike of current as it switches, and that can cause problems both for itself and for nearby ics as it tends to produce a negative spike on the supply lines. It is pretty essential to place a ceramic 100nF capacitor across the supply pins, close to the ic to suppress that. It's not so necessary if a CMOS 555 is used.
It doesn't matter for the astable circuit you show, but for use as a monostable, or other circuits, it's worth knowing that the TRIG input (pin 2) overrides the THRES input (pin 6), which means that if the TRIG input is held low, the output goes high and the THRES input cannot reset that by being taken high.
I agree this is one of the best explained 555 timers vides that I have seen, I remember looking at the timer at college and it seem difficult to understand as we had was the RS data sheet written by electronic professors
Thanks. Brilliant comment, encourages me to produce more....
I once found a single chip circuit board controlling the water level in a tank. Very very old system. I asked the maintenance grey beard why they had a microcontroller instead of a PLC. He laughed. "That's a 555!"
With some resistor magic and a variable resistor on a float, they set the low level to report 3v, and the high level to 6v, and the 555 triggered the fill valve.
Thanks for sharing. I'm sure there's been millions of different 555 implementation types over the years.
Brilliant explanation! It's not often I find any material that blends theory and practice so well. Your shifts between diagram, breadboard, and oscilloscope are beautifully timed in the video; this is the clearest I've ever seen a 555's operation described. Thanks for taking the time to craft such an excellent video!
Glad you enjoyed and thanks for the great comment.
Nice to hear this explanation lives on..
PNP & NPN Was one of the first things I was taught when I was in a YTS T.V. Engineer training apprentice. ~1986 +
Point iN Please & Not Pointing iN.
Project building hobby led to a self taught knowledge of the voltage polarity workings for basic switch amplification. ie.
PNP = A Positive on the Emitter then the base should be held Negative 0v to switch the collector through to the Positive.
NPN = A Negative on the Emitter then the base should be held Positive to switch the collector through to the Negative.
Basic relay type stuff.
But also a general rule in amplifiers but that gets more datasheet reliant for HFE values etc.
Cheers.
Thanks for the comment.
This is by far one of the best explanations for an electronic component that I've ever seen.
Your intro burst my ears (I was wearing earphones) but it was totally worth it for how good this video was and how well I was able to understand what you were teaching.
Thank you for this video ❤
Thanks. Yes a few people have mentioned the intro volume. I had tweaked by OBS settings prior to recording to try and improve the clarity and forgot to normalise my intro recording.
Other than that, I'm glad you made your way through it and found it of use.
Nice explanation of how a 555 works.
Thanks for the comment.
Thanks, I will need to watch this a couple more times to completely understand it. I'm a bit new to elecronics!
@@Ancipital_ thanks. And yes, watch a couple of times or more and it will sink in.
Best 555 explanation I've seen 👍
Wow, thanks! Make sure you Subscribe, there will be more coming.
This is by far the best explanation of the 555. I struggled to understand it , but this made it clear.
Thanks for the comment, much appreciated.
excellent explanation of how the 555 works.
Thanks! 👍
My father, an electronics engineer said "PNP = Piss _in_ Pot (arrow points in) NPN = _No_ Piss in Pot (arrow points out)" when I was learning this stuff as a kid.
Brilliant! 😄
Thanks for making this video! I had 3/4 of an idea how these chips worked, but now it's crystal clear. You are a great teacher.
I hope you keep making these vids. Cheers!
Thanks for watching and the comment, glad you found it useful. Yes more videos are coming, so make sure you Subscribe too 😁
It is a brilliant chip design, sooooo versatile! I like it very much. I also like LM10 - look it up, the datasheet just oozes with ideas.
Absolutely wonderful explanation of the 555. Thank you.
Thanks. Glad you enjoyed.
On the NE555, the reset input always overwrites the set input.
On the B555, the set input overwrites the reset input. The replica wasn't quite perfect.
This only happens when pin 2 is low and pin 6 is high at the same time.
So comparator 1 and 2 are high at the same time.
But for most circuits it makes no difference, because pin 2 and 6 are mostly connected.
Therefore both comparators are different or both low.
With the B555 the /Q output of the flip-flop is not used but the Q output.
That's why set is stronger than reset. Accordingly, the output driver is not inverting.
Brilliant! It makes me admire the engineer who thought this up in the early days of digital electronics. Also confirms that all electronics is analog.
Thanks for the comment.
Yes all electronics can be said to be analogue. A 1 or 0 is only a voltage threshold at the end of the day.
Just to add, from my experience, everything also always boils down to Ohms law if you drill down enough.
Man ... this is what I like. Easy to understand with a nice example on what you did. Subscribed 👍
Awesome, thank you!
Enjoyed the whole video. I had learned about 555 before but this is much clearer and easier to remember. Keep doing this please. Cheers.
I finished Ben Eater's 8-bit CPU and wanted an even more in-depth explanation for the timer, and your video was fantastic. Also had no idea those jumpered resistor network boards existed!
Wow, that must have been a rewarding project to have completed. I have watched Ben's videos too and fascinated in seeing the building blocks of a computer assembled and running on breadboards.
First video I've seen of yours and its great. Very clean, no blurry camera stuff, WELL explained, excellent format of diagrams and bench testing. Liked and Subscribed!
Awesome, thank you!
Well explained. I can see why these things were so handy
Thanks for your comment.
You put a lot of effort into this video, thanks, I hope you are not discouraged by the lack of interest
Thanks. It was indeed a lot of effort. I just hope people enjoy the results. Thanks again for your comments, much appreciated.
Lack of interest? You commented 3 hours after it was published. Give it time, Im sure this vid will get a lot of views .. or at least it should, considering how good it is.
@@tedbastwock3810 I could not have said it better myself. This is by far the best explanation. I think this video will go viral
Thank you for this educational video! Really like the idea of colour-coding the voltage values!
Thanks. Yes colour code t represent the voltage (or potential) I think helps a lot. Pleased you found it useful.
Wonderful video - thank you! Best explanation of a 555 I've ever seen. Really helpful!
Thanks, much appreciated.
For me, I get nostalgia remembering the late 1970s starting in college studying engineering physics that included using an analog computer (shoved in a corner storeroom) and some basic biomedical electric engineering design. Isolating the patient from any mains exposure.
In the late 1990s, much to my wife's disbelief, I would study/stare at high fidelity analog amplifier circuit diagrams. From vintage tube amps to state-of-art solid state stereo amps.
Following the various feedback circuits used to eliminate harmonic distortions.
Why? I'm not sure. I had extra time on my hands and it was so relaxing.
Just like watching this video.
"555 timer" circuits used to be in the many electrical/electronic hobby magazines years ago.
Magazines.
Gone the way of phonographs, magnetic tape, CDs, laser discs, DVDs, etc.
My 2003 Toyota had an electric motor extension for the radio antenna that was broken off in the car wash. It ran every time I turned the car on or off. I thought I could just pull the fuse.
It was fused, all right. But on the same circuit as 10 other totally unrelated and multiple necessary things.
Probably through some special IC or microprocessor?
I couldn't find a "wiring diagram" on the internet and the dealer will not give me a copy.
Actually, the dealer has no circuit diagram in the classic meaning of the words.
Just broken up functional portions on their computers.
I finally had to pull the power wire by accessing it through the wheel well above the tire.
I miss the 20th Century.
Keep the videos coming. I'm sure I'll enjoy them.
Thanks.
Much of the old fashioned approach of trying to fix stuff yourself has sadly gone. But there is a new era of developers, building entirely new and exciting electronics devices out there. I'm convinced the emergence of low cost micro-controllers has fuelled a mass increase in young interest.
Its very very informative , back in days i used to wonder how the 555 ic worked.
But the thumbnail is misleading
Thanks for the comment.
Sorry if this confused you. The thumbnail text is the main tool we have to attract views and is somewhat tongue in cheek and a bit controversial I suppose. But, you have to watch the video to understand what I really meant by the statement.
It's only a timer if you add components around it to become a timer. The 555 is a far more versatile device and can be put to many other uses too. There are more videos to follow.....
Brilliant explanation.
Liked and Recommended, I'll do whatever I can to see this channel grow. ✌
Thanks very much.
Great video, thanks for all the effort you put in to create this with all the graphics too. Great work :)
Thanks for the comment, much appreciated.
I never had the tools to see this, pretty nice to know!
Until this video, I always thought the timing mechanism was a constant somehow and explanations of the 555 never pointed out the required external components to make it work. Capacitance and resistance was all it ever was and now I feel like I have a good handle on the whole thing. It's amazing how many blanks this single video filled in, particularly the noise capacitor
Great! Glad this video has helped fill in the gaps.
thanks for a really interesting video. I look forward to seeing more on the 555 and other components. I amcurrently building my own little electronics workspace where I can build stuff like this.
Thanks, glad you enjoyed and please your starting your own little electronics workshop.
Great explanation, you made it really clear and easy to understand
Thanks. Glad you enjoyed.
Excellent vid.
Clear explanation etc. Very enjoyable. 1st class stuff. Thanks for your efforts.
Glad you enjoyed it and thanks for the comment.
Very impressive demonstration and explanation!
Thank you.
Excellent explanation and diagrams, thank you!
Thanks.
After all these years... I finally understand these things! Thanks a ton! You just got a sub from me!
Great, welcome onboard!
wow the 555 is a bit latch! I have it up on a breadboard with multimeter leads and some pull up resistor on the trigger pin so it defaults to 0 and was following along with the graphics. that's super cool :D
@@GenericCat brilliant, glad you enjoyed.
instant subscribe. the best explanation video of the 555 ever.
Ditto
Great, thanks for Subscribing.
Brilliant! Thank you.
555 timer is real handy thanks for the video
Thanks for the comment and watching. Glad you found it useful.
Brilliant explanation. Thank you. Subbed!
Many thanks. Glad you Subscribed, welcome to our growing community of electronics enthusiasts, hobbyists and professionals.
This was a fantastic video... the presentation is... chefs kiss 👌
Thanks, glad you liked it.
Great video. I've been using them since the early 80's It's hard to believe it's been around for so long. Thanks for sharing. PS> might want to reduce that intro volume a tad.
Thanks for watching!
"Might be a timer..."
"IT'S NOT A TIMAH, NOT A TIMAH AT ALL!"
Nicely done.
Very clear.
Thankyou.
NPN = "Never Points iN" is a brilliant mnemonic
And for a PNP it's Points iN Permanently
It's been around for a long time. My father taught me NPN and PNP going on close to 60 years ago now.
He also taught me the resistor colour code... (NSFW version)
Ahh, a man of class. I see a UT61E here ;)
Indeed. And, a set of Probe Masters.
Really well explained!! I hope you get many more subscribers
Thanks. and yes me too, although the count is gradually creeping up. The %views vs Subscribe is VERY low, but I believe that's quite normal.
Awesome video! Thank you!
Thanks for watching and thanks for the great comment.
Brilliant how the switching points are at 1/3 and 2/3 of the voltage range respectively, making the charge and discharge relatively linear.
Imagine how inconsistent the timing would be if the switching points where near ground and VCC.
Yes, although the RC time constant remains the same throughout the charge/discharge phase, the shallower curve region as the charge approaches the +V or -V potentials, would probably cause some erratic behaviour.
Very well explained. Thanks.
Thanks for the comment.
Without doubt the best explanation
Thanks so much, glad you liked it.
What an awesome video, I always thought of the 555 as being a fancy flip flop, now it all makes sense, 555 is just a 1/3-2/3 hysteresis circuit.
One of my favorite funny projects with 2 555s or a 556 is the atari punk, an atari like sound generator, maybe that can be an interesting explanation later if you continue with the 555 series?
Thanks for the comment. More 555 videos will be coming.
Beautifully explained. Thankyou
Thanks for the comment.
this is super informative. people are lucky to get this depth of understanding since school will likely not teach this. Could you do a video like this but covering LDOs?
What is an LDO?
Phenomenal video!
Thanks so much. Comments like this make all the effort worthwhile.
Loved the video but I would have hired that Schwarzenegger voice impersonator from insta and had him say "It's not a timah" in the opening, a la Kindergarten Cop 😆😆
Thank you for your great explanation 👍
Glad it was helpful!
Ok a minute in and you got a new sub.
Brilliant! Thanks.
Not being snotty but I understood all of that. Having worked for many years with jobbing hardware engineers I'd be amazed if they had the intelectual capacity to have understood this. I am a Software Engineer unfortunately ;-)
This video is fantastic! Thank you so much! 🎉🎉🎉
Thanks for the comment. Please make sure you Subscribe and help the channel continue.
Thank you for this marvelous video.
Glad you enjoyed it!
You earned a subscriber!
Hope you get many more!!
Brilliant! Thanks for watching and especially for Subscribing too, it makes a difference.
Hey.. woah… wooooaaaahhh… 1971 is not very old. Thank you very much. A lot of good kids were born in 1971 that aren’t very old… 😤 including myself. 😂
Great video by the way thank you I’m a beginner at 53 at electronics so it’s good to have things explained so well
Haha. I was not born in 1971.
I'm actually from the 60's !!!!! eek!
Best explination ever! Thanks😁
Thanks. Glad you enjoyed. Hope you have Subscribed too?
What a great video, thank you sir. 👏
My pleasure.