Using the 555 Timer

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Learn how to use the classic 555 timer and build some simple projects with it.
Article with hookup diagrams: dronebotworkshop.com/555-timer
More articles and tutorials: dronebotworkshop.com
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Today we are looking at one of the most famous and useful integrated circuits ever produced - the 555 timer IC. Although this tiny device is over 50 years old it is still in use today, and for many applications, it is a better choice than using a microcontroller.
I’ll explain how the 555 works and how to use it in its three different modes - Astable, Monostable, and Bistable.
We’ll then build some simple, but useful, projects using the 555 timer, including a light chaser and a DC motor controller. They are easy to build and, unlike a microcontroller, don’t require any programming.
In fact, there are a lot of situations where the 555 is a better choice than a microcontroller, especially when you consider how inexpensive and easy to use it is.
Here is the Table of Contents for today's video:
00:00 - Introduction
01:40 - 555 Timer Operation
10:28 - Astable Mode
15:09 - Monostable Mode
19:14 - Bistable Mode
23:12 - Light Chaser
28:15 - Latching Switch
30:39 - DC Motor Controller
34:36 - Touch Switch
37:20 - Servo Motor Tester
40:03 - Conclusion
If you’ve already used a 555 then you’re probably aware just how versatile it is. If you’ve never used one, then hopefully this video and article will inspire you to build a few projects with it. Hope you enjoy it!

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Опубликовано:

22 июн 2024

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Комментарии : 592

@Dronebotworkshop 4 месяца назад

Hi everyone - It's come to my attention that there has been someone masquerading as myself, responding to some comments here with a link to a Telegram chat to win a prize from me. THIS IS A SCAM, I am not holding a contest, nor do I have a Telegram account. PLEASE DO NOT RESPOND TO THESE MESSAGES!! It's happening on a lot of my videos, I'm taking steps to remove them manually, but as I have 162 videos, it will take some time. If you do run across a suspicious comment, I would appreciate you letting me know at info@dronebotworkshop.com. Thanks! Bill (The real one!)

@feezyadz5940 3 месяца назад

Hi sir, thanks a lot for this amazing video. i didn't quite catch the working principle of the latching switch circuit. i am also trying to simulate it but no luck. any more explaination would be great or even the reel. thanks a lot

@jimdean7335 2 года назад

Awesome. I sure wish you’d have done this back in 75 when I first learned the 555. I still have a book from back in the day that I refer to from time to time. You have an effective style of teaching, keep up the good work.

@diggee172 2 года назад

I totally agree. My sentiments exactly. 🤣. This is great. Young people today are so blessed to have teachers like this, the internet and RU-vid. I’m learning so much.

@alcroc 2 года назад

Well said Jim, the book just confused the hell out of me. Gonna get me a 555! lol.

@rdhunkins 2 года назад

@@diggee172 Yep, these whippersnappers got it so easy! (Now get off my lawn!)😉

@oldmech619 2 года назад

It was always a 555 in my projects back in the early 70s. Very versatile

@raylularoussef247dasilva6 2 года назад

@@alcroc p

@SirMo 4 месяца назад

I'm teaching my nephew about electronics. So I'm building some very basic circuits with him, to get him familiar with different components and some very basic theory. But a 555 project with some blinking LEDs is what really got him excited about electronics. Everyone should have some 555s in their electronics draw. Such simple yet versatile little components. This video came in really handy on reminding me of how to use the chip. Great explanation!

@YLprime 2 года назад

This is a REAL tutorial, none of that 12 mins joke, thank u!

@mateo77ish 2 года назад

I’m an older dood that was surrounded by electronics growing up, but never cared about any of it until recently. I grabbed an off-market Arduino kit and began collecting and disassembling all sorts of machines to try and teach myself. These videos are great for helping me wrap my mind around this stuff. Thank you.

@acestudioscouk-Ace-G0ACE 2 года назад

So true and me likewise!

@thebeequeeper5424 2 года назад

@@acestudioscouk-Ace-G0ACE , I'm 76 and just starting to learn electronic's, Pilot and Business owner for 50 years, so I have a lot to learn, would like to connect, if possible.

@acestudioscouk-Ace-G0ACE 2 года назад

@@thebeequeeper5424, you are welcome to contact me through my website.

@S24W2 11 месяцев назад

Anyone know what the idea of the diodes are in the potentiometer (fan part)?

@kamakaziozzie3038 3 месяца назад

dood!

@sinjhguddu4974 2 года назад

I have not come across a 555 timer illustration this beautifully done. Thank you Sir, for the time and hard work put in.

@Dronebotworkshop 2 года назад

One thing I forgot to mention in the video, but did mention in the article, is the units used in the formulas for calculating the time with the resistors and capacitors: Time is in Seconds Resistance is in Ohms Capacitance is in Farads

@ThomasAndersonbsf 2 года назад

flashback to Forest M Mimms III engineering booklets sold at radioshack LOL

@cnc-maker 2 года назад

Your bistable mode schematic is incorrect. You have both switches going to Vcc, when they should be going to ground.

@ThomasAndersonbsf 2 года назад

would have been nice to touch on the frequency differences between the types as I have seen most are 500kHz while LMC I believe are capable of 3mHz high end range.

@tnamen1307 2 года назад

Sir... Can I used 555 Timer for a car to automatically lock all doors when speed reaches 40 kmph? Please kindly make video for this auto door locked circuit. Thanks in advance.

@shaylehirschman1748 2 года назад

@@tnamen1307 Would you consider doing your design in a PLD or FPGA, or even a microcontroller, which can come on an off-the-shelf board that you program? Then you use an oscillator for the clock. The 555 and assorted logic chips could be used for fun, instead, but you’ll have a better platform and still be simple to program if you use a microcontroller or FPGA.

@anonymous.youtuber 2 года назад

That’s a very nice walk through memory lane, I used the 555 40 years ago to build a voltage controlled 50 kV power supply.

@joerinaldi5 2 года назад

I studied Logic gates and 555 timers back in 1986 glad to see there is still someone teaching the basic electronic building blocks.

@octogames6823 2 года назад

This was a great intro to 555's. The last time I used a 555 was in the mid 90's.

@namlow 2 года назад

Working on it while first introduced over 50 years ago. Did not work on digital electronics/ICs since 1979. What a refreshing memory from your video! Thx!

@citizengkar7824 Год назад

The best 555 timer tutorial I have seen. As usual, you have encapsulated the essentials, of the tested component, with your direct, concise, & precise instructional methodology. Thanks.

@nicholasmaude6906 2 года назад

This IC combined with the 741 op-amp IC can be used create literally thousands of different circuits.

@yteicosf1103 2 года назад

Finally a video on one of the most used IC in the world.

@tomaszwota1465 2 года назад

A dive into the good old 555! Just what I needed on a Sunday, thanks!

@stormztron 2 года назад

👌

@nigelman9506 Год назад

Your explanations and graphical illustrations are 100% easy to understand, the best I've seen so far, well done

@Jvavolerpareil 2 года назад

Great ! I'm using 555 for a lot of projects since long time, so I got some experience about this chip. I still learned new things by watching your video. Very easy to understand for beginners, but still useful for experienced technicians. Thanks for sharing your knowledge with us.

@KJ6EAD 2 года назад

The 555 and 556 have 2-transistor totem pole outputs. In the 4017 sequencer circuit there's no need for 10 current limiting resistors for the LEDs. Since only one output is high at a time, a single resistor on the ground side of the LEDs can be shared.

@Theineluctable_SOME_CANT Год назад

And..... The 4017 will current limit (run out of drive), so the resistor really is moot.

@KJ6EAD Год назад

@@Theineluctable_SOME_CANT I've only been able to get about 15mA out of the 4017 but can't recall finding a clear specification in the data sheet. It often makes good sense to use drive transistors.

@Theineluctable_SOME_CANT Год назад

@@KJ6EAD only for heavier loads...

@AMGTOM Год назад

I live far in north Africa and never seen such a great electronic Teacher. Thanks Sir.

@Jeff-0621 2 года назад

Thank you! Like the 50 caliber machine gun, it’s a classic and still in use years later. Although there are others that could be use, it’s reliability seem exceptional. I’ve always wanted to learn more, and I know breadboards are the best way to learn circuitry. Knowing about the 555 makes it even easier (financially) to acquire it.

@andresalejandrogazaba9885 2 года назад

jajajaja con una calibre 50 lo comparo!! ajajjaja ay ay ay!

@user-qw3jn7bd7i 7 месяцев назад

소중한정보를 실제회로를 통해 알려주시니 감사합니다. 영상 만드시느라 수고하셨습니다.😊

@whatstdiggn 2 года назад

I love your channel. I've been watching it for a couple of years now. You're like the Mr. Rogers of electronics.

@FW190D9 2 года назад

Thanks for making these videos. I’m a beginner and your attention to detail helps me immensely !!

@carlgradolph9676 Год назад

Thanks for making and sharing this video. It's obvious that you spend a good deal of time devising your projects, as well as writing scripts, setting up lighting and camera angles and so forth in order to create outstanding educational content. I wish I could say the same about every RU-vidr....!

@davidmaloney4860 2 года назад

Thanks! Outstanding video with a great explanation of how the 555 works and a lot of practical uses. On of your best videos to date (of many)!

@BirdYoumans Год назад

Thank you my friend for what you do. Your production techniques are well above the norm and you teach without a lot of fluff. Just to the point. You make it look easier than it is!

@derekloudon8731 2 года назад

Hi Bill, sometimes it's nice to 'step outside' the microcontroller world and get back to basics. The 555 has always been a most useful device. It would be good to see more videos along this line (and perhaps some hybrid micro/logic chip outings).

@jamestaddeo4435 2 года назад

I have a couple of tubes of these left in my own parts collection. A very cool, versatile, and useful IC for sure.

@paulrichards2365 Год назад

i had tubes of 6502 microprocessors and 6502 ram that my wife had me throw out. Not long after I hear NASA wants them for the old Space Shuttle :(

@jj74qformerlyjailbreak3 2 года назад

I didn’t realize this was a NEW video. I thought it was at least 5year old. 😂 It was still gold. God Bless.

@stichter51 2 года назад

Another great, crystal-clear video. The thought and effort you put into the graphics is greatly appreciated. Thanks!

@carlossaraiva7968 2 года назад

You are a must see teacher. You're great, soft and clear explanation, great English , easy to understand, in sum, Great Professional channel

@eddyelectron9234 2 года назад

Have to agree with Jim Dean re: your teaching style. Thanks for the 555 refresher course. I do however prefer the CMOS 555 in my projects. Many thanks for all your videos.

@acestudioscouk-Ace-G0ACE 2 года назад

I'm 50 years late learning about this chip but you've inspired me to try it...thanks and better late than never!

@OcenaSoft 2 года назад

Wow, I love this IC and have books from the late 70’s just for this IC - well done on this video - one of my favourite so far - THANKS

@fuhkoffandie 2 года назад

The 555 and 556, two of the most useful IC's they've ever made.

@jamesbiswas3309 2 года назад

This is an age-appropriate training. I have personally benefited a lot. Sir, thank you very much for this training. May God bless you

@matteocassino3172 9 месяцев назад

Excellent introduction in the 555. Exactly what I needed: 555 in monostable mode in combination with a PIR motion sensor.

@KaziNazmulYT Год назад

Hello sir. I'm commenting here just to inform you that you are doing excellent work uploading such informative, descriptive, and quality video tutorials. I'm from Bangladesh, and I always watch your tutorials. Since I am an undergraduate student in the EEE discipline, your previous tutorials helped me immensely in my applied study field. I am happy to thank you and wish you good health. Please keep supporting us.

@terrygerhart1485 Год назад

👍 👍 👍 👍 Always good Karma to acknowledge the people that help you through out life. All the best from Canada

@chrisfuller1268 Год назад

Great video! For de-bouncing I always used 74LS221 or whatever version of the 221 provided the speed and interface voltage needed. Similarly, I used the 74LS74 or other flip flop parts over the 555 due to the simplified operation. Cool to see all the functions of the 555!

@MatthewRaw 2 года назад

Easily the best vid on the 555 anywhere on the internet! Thanks so much for making this!

@thishandlecrapisstupid Год назад

Thoroughly enjoy learning about the basics without feeling like I'm in kindergarten, or trying to fake it in some graduate class. Well done!

@flaviusnita6008 Год назад

One of the best circuits ever! You find over 1000 examples of using it!

@allnicksweretaken Год назад

I built that PWM motor speed controller about a year ago for a prototype. Worked like a charm! ^^

@Ymanntronics Год назад

Thank you so much again! Honestly you are one of the best teachers I have ever encountered in my life🙏

@baldrickdaisy8982 2 года назад

A very detailed and informative lesson on the 555 timer and how they can be used 👌 Neat little animations in your video too Bill 😄. Thanks 🙏🏻

@LeonMatthews 2 года назад

That is a fantastic diagram of the chip's functional blocks. Excellent video, as usual. Thank you.

@abasahmed Год назад

Hans Camenzed, the creator of the legendary 555 would be so happy that you made this video. It was my first IC that I made something with back in 1989.

@Bromon655 9 месяцев назад

I love your schematics, as someone new to this stuff I found them very easy to interpret and replicate compared to elsewhere.

@mickeyfilmer5551 2 года назад

A fantastic video. So useful for people learning electronics.

@joelkoren3241 5 месяцев назад

Sir, you are a naturally gifted trainer of God's misteries. Brief precise operating principles reinforced by excellent schematics and models.Excellent talents not many instructors have.

@allthegearnoidea6752 Год назад

I’m using one of these to control the power to a pico in an IOT application. I was going to make a video on the 555 timer but couldn’t possibly make such a good job as you have in this video. Beautiful done my hat is off to you sir! ,

@_FJB_ Год назад

This is byfar the most effective and easiest to understand while explaining everything. I'm going to binge on your channel sir! Thank you greatly!

@mrcleanisin 5 месяцев назад

Excellent video. I no longer have the project or the schematic, but back before cell phones I put together a circuit using a 555 timer in order to patch my mobile CB radio to my home telephone. I was able to do this only when touch tone phones were in use. I only had one-way communication, but it worked well, even got about 10 miles from my base antenna, which was mounted in the top of a pine tree.

@johnsantos975 2 года назад

Thank your diagram was the best one to follow as your expertise shows that you can get anyone to understand this circuit. Thank you...

@DesertVox 2 года назад

I just got an order of 20 555 timers, dirt cheap. I was looking around for a good tutorial. This is it.

@thomasparisi5333 2 года назад

Brings back memories :) I remember ordering some 555's, 741's, and 2222's back in the late '70's from James Electronics, fond memories......

@qwkimball 2 года назад

Wow. This is the best explanation of the 555 I've ever come across, and I'm older than the darn chip is.

@yupingliao4078 2 года назад

NE555是老掉牙的蕊片，真的是前輩時代所使用的，真叫人懷念，謝謝你

@lukebowers536 7 месяцев назад

My fave chip ever invented & so useful for so many things, you have a fantastic clear way of teaching, the internet needs more folks like you, keep up the fantastic work,

@lwentz5510 Год назад

You have done this extremely well! Thank you!

@akshay.kumar.k 2 года назад

Probably the marketer himself took the name from the three resistors..?

@amnprince9121 7 месяцев назад

agreed, thats most likely the case

@BlackDragonBE 5 месяцев назад

@@amnprince9121 3:31

@xpcwalker9421 5 месяцев назад

Yes

@scotty3114 4 месяца назад

Idk, I have marketing to totally ignorant of the item they are trying to sell. They throw crap at a wall to see what sticks. Almost as (tongue in cheek) intellgent as the cost reduction department!

@ReneStover Год назад

Excellent demonstrations, thank you!

@advX 6 месяцев назад

We’ve been using 555 timer chip back in college labs 1998, very useful! Awesome!

@larrygraham3377 Год назад

Thanks for a great video on 555 Timmers. Takes me back to my lab days when I was in school earning my B.S Degree in electronics. 😉😉😉

@ableutopia2721 2 года назад

Outstanding in all regards, great job. Thanks for posting!

@sadunnakipoglu9471 27 дней назад

أشكرك وأقدر مجهودك ، تحياتي لك من تركيا .

@beeman1885 2 года назад

Great video. Love the “back to basics” material along with the Arduino and Pi material.

@NachbarFizgo 2 года назад

Absolutely great! Thanks a lot for that video!

@gooddealonly Год назад

The 555 timer was available in 1972 by Signetics. I remember making a timer for the darkroom photo enlarger exposure. The 20222A and 2N3055 transistors were very popular for projects at the time also.

@Joemozz 2 года назад

This is a general comment so, not necessarily about this video. I just want to say I like your channel a lot because all your explanations are crystal clear and your visual animations are always top notch. There are several good channels out there talking about similar topics but yours is amongst the best. Don't take offense but the only thing I dislike about your channel is the fact that you talk very slowly...! : so I end up watching all your videos at 1.5 times normal speed, and I find that the flow of your speech is just about normal then lol... : ) So... Kudos and keep up the good work !

@petermolnar6017 2 года назад

As always, great video! Thank you!

@MiguelAbd 10 месяцев назад

Absolutely amazing video. Even I, an absolute beginner, can understand things this way. Thanks!

@alcroc 2 года назад

Where were you 40 years ago when I needed a simple yet great explanation of the 555? 😄

@marknkatz Год назад

Boy, this brings back memories. I haven't done any hardware design and building in decades but used these a lot in the 1970s for my own designs and those copied from the likes of Popular Electronics and Radio-Electronics, among others. Somewhat surprised that the device is still being used 50 years later.

@AB.BABY. 2 года назад

Thanks for this tutorial. Super useful.

@amnesie6615 2 года назад

This video is so important, since the NE555 is so useful !!!

@p.g.pg38 2 года назад

Excellent, comme d'habitude! Merci pour le partage.

@ismaelissah2518 Год назад

So far this is the best video I have seen on youtube about 555-timers. This video is awesome! Thanks for the good work.

@antonioap.5409 2 года назад

Muito bem explicado parabéns. Um abraço de Portugal

@chrisrudy1969 4 месяца назад

Thanks Professor DroneBot ! So educational! Thank you!

@krishnaghatol1391 2 года назад

To all the people new here... This guy is the best in the business

@barry7608 Год назад

Very informative, and very well demonstrated. I reckon with my limited knowledge I could build and understand these circuits

@iampepepapi 2 года назад

Thank you for such an insightful video! Keep making these!

@botoxpig417 2 года назад

Its all pretty amazing. Love it.

@floretionguru2977 2 года назад

Thanks for your extremely clear lectures. On it being a rumor that the 555 was chosen because of the three 5k resistors, I think it's still possible to turn out true even if it was chosen by someone in the marketing department who thought the name sounded cool. I mean, if I knew nothing about electronics at all and someone showed me a schematic of a new timing chip product and told me market it, the three 5's would probably be the only part I would immediately understand and, hence, find "cool".

@nicholasmaude6906 2 года назад

Imagine if marketing had decided to call it the 911;).

@floretionguru2977 2 года назад

@@nicholasmaude6906 You mean like the Porsche?

@DivinoFiatella 2 года назад

As a student, this is really precious. Cheers from italy!

@godswillgoodluck Год назад

Thank you for your explanation

@geoffphillips5293 11 месяцев назад

I loved the 555. My clumsy efforts and poor soldering managed to make a wheel of fortune that spun down from fast to slow using a series of these.

@WildLifeBackyardCamera 2 года назад

such amazing quality content !! Thanks

@lrdick 2 года назад

Thank you for this video. I'm an old dog learning new tricks; this helps a lot.

@gpTeacher 2 года назад

Thanks for a really informative tutorial. Certainly demystifies the little workhorse!

@__--JY-Moe--__ 2 года назад

not time consuming @ all !! super quicky!! thanks ! good luck!

@benyaminmoghadas5592 2 года назад

This was incredibly useful,keep up the good work

@lorencarlin2087 6 месяцев назад

Very informative! I've breadboarded lots of 555 projects, mostly audio oscillators. Thank you for this video. I understand this chip much better.

@AsBi1 Год назад

these videos are so helpful. Thanks

@isaacshahar725 2 года назад

I love the way you present the case......

@t1d100 2 года назад

Thank you, for another wonderful video! Your point about the price advantage of the 555 verses micro-controllers is well taken and not disputed, at all. But, I would like to share some knowledge, for the folks that don't know much about MCUs. There are many small micro-controllers that fall within your $1 total project budget... The ATtiny85, PIC12F683, etc. 1) They offer different functions than a 555 and those different "muscles" may be advantageous to the project's goals, so they are worth considering. 2) These are older MCUs and they are being phased out by the OEMs, in favor of their newer designs. I know all the business reasons for phasing out a product, but losing these little powerhouses is a pet peeve of mine. If we will continue to buy them, they will surely continue to make them.