Thank you so much, I am glad you like the video! :)

Thank you so much, Bill! Yeah, I also realized the pacing is a bit fast, I will try to do it more slowly in future videos... I am still quite new at this, lots of things to learn! :) There is also the companion article at www.friendlywire.com/tutorials/ne555 with the written version of this tutorial, if you like. Thanks for your kind words, and have a great day!

Thank you so much, glad you like the videos, Rudrajyoti!

You're too kind, thank you so much!

Klasse, freut mich dass das Video hilft :-)

Thank you so much, I am glad you enjoyed it!

Thank you so much, Hector, this means a lot. And I hope you'll enjoy playing around with these 555 timers! :)

Thank you, Michael, glad you like it! :)

Thanks, that's fantastic!

I know, it's a bit confusing to get started with it... Let me know if you have any questions, I will be happy to help. Also, there is a companion article to my video here: www.friendlywire.com/tutorials/ne555/

Thank you so much, glad you find the video useful! :)

@@FriendlyWire i heard about this channel from one my "guru"- (teacher) EKP CHINTHAKA , and he keenly recommend the channel. I must acknowledge him. Keep up good work 👍👍👍❤❤

@@onemorenight3470 Thank you! :)

Thank you, Nicolas! Do you have anything else you want to learn? I am always eager to hear suggestions! Thanks again, and best wishes from Canada :)

Thank you for warnings. But this video is so value-added that I personaly didnt notice little details.

@@eroltube100 Thank you, Erol, that is very kind of you. I am glad you find the video helpful. I think it also shows that there is always more to learn! :)

That's fantastic, I am so glad to hear it! If you like this kind of stuff, and get it working with the NE555, check out my videos on the CD4017 decimal counter (and the CD4017 code lock), you might enjoy that, too :)

definitely!@@FriendlyWire Thank you!

@@nabzero6528 Awesome! If something doesn't work, don't get discouraged, it's all pat of the journey. And I will do my best to help you out, just leave a comment under the videos :)

@@nabzero6528 Of course, happy to help, and good luck! :)

Thank you, Joshua, glad you like it! :)

Happy to hear it, Yuriy! Моє задоволення :)

Thanks so much! At what points am I going too fast? I would love to hear your feedback since I am still pretty new at this :)

@@FriendlyWire perhaps it would be more accurate to say it is concise, which is rare on UKposts. Fun to watch too.

@@jerril42 Oh, thanks! I am very happy that you find it useful and entertaining :)

Thank you for your kind words, Andrew, I am glad you found the video useful! :)

Thank you so much, glad you like the video! :)

Thank you so much, Ian, I am happy you like them! Have a great day! Let me know if you have any comments on what I can improve, I am still somewhat new at this :)

FriendlyWire literally nothing comes to mind. They’re superb. I really wish I had this type of teaching material when I was first learning. One thing that I see less experienced folks struggling with is how to properly use a multimeter. (How to measure the current of an LED for example) It would be great to have tutorials on the basic tools typically used to help debug and probe the circuits you’ve taught them how to build. Also, how to work with BJTs ... the humble 2N2222A is a useful little beast, especially when you need to drive a load from a TTL logic chip (or arduino module). Explaining the difference between source and sinking currents would be great too.

​@@IanJohnstonblog Thank you, those are great ideas! When I started electronics as a kid I had an analog meter that was hard to read and only much later switched to a digital one, but only very recently I acquired a bench meter, and I am glad that I did... Debugging circuits is definitely a great idea, but it can get very complicated very quickly, so I will have to try and find a right combination that makes sense for beginners and does not require too many expensive tools. Thanks for the input, much appreciate! :)

Thank you so much, happy to have you, and I am glad you liked the video!

Thank you so much, Alan, glad you like it! Have a great day! :)

@@FriendlyWire No Problem! and thanks! :) Also, I built the monostable circuit exactly like the video and it worked :D! but for some reason, I had to use a 220uF capacitor for the timer to last about 2.3 seconds.

Nvm lol i had a slow moment I grabbed a 22nF cap by mistake instead of 10 🤣🤣 the simplest mistakes man

@@alanmoreno9074 Great work! And yes, these mistakes happen all the time, glad you figured it out and it all works as intended :-)

Thank you, Muhammed, means a lot! :)

Thank you, I am glad you liked it! :)

Thank you, glad you liked it!

Thank you so much, Luca, glad you liked it! :)

Thank you, glad you like it, and have a great weekend!

I am glad you liked the video! I don't speak Russian so I used a translator to read your comment :) Have a great day!

Glad you like it, thanks! :)

Much appreciated, thank you, Brandon!

Thank you for that beautiful comment :) Several people have let me know that the pace in the NE555 video is too high, and it was one of my earlier videos, so I hope I have since taken that into account. Sometimes it's hard to realize these things by yourself, which is why I appreciate this comment a lot. I think that if you have build the astable oscillator circuit and it works as advertised then the chip should be OK. If you only test the bistable mode then you only know that its flip flop works, but you have no idea about the comparator module. Regarding the other variants of the chip: yes, they should work. The only difference is the operating voltage. Some chips (especially older ones) only work with exactly 5V DC, whereas newer CMOS-based designs accept generally 3-18V DC. So make sure to check the datasheet on that, just to be safe. Other than that, newer parts may support higher frequencies, but I think that may not be relevant in this case. Let me know if you have any other questions, thank you again for your comment, and have a great rest of the week!

Thank you so much, have a great week! :-)

Thanks so much, it means a lot! These videos involve a lot of editing, and since I am doing this by myself it takes me a few weeks to finish one :)

Thanks so much! Let me know if you have any questions :)

Thanks Ragesh! :)

Thanks, glad you like it!

Haha what? :D

Thank you, glad you like it! C2 is just there for stability, it is not part of the timing. You can probably omit C2, but it is recommended not to leave pin 5 floating.

Thank you, it means a lot :)

Nice catch! It doesn't matter, you can build it both ways, it is exactly the same :)

Thank you, and good question! This confusion happened because I did not explain the RS flip flop accurately, unfortunately. If C1 is more than 1/3 then the output of COMP1 is low, but so is the output of COMP2. This means the RS flip flop sees two 0's at its input. In this case, the flip flop does not do anything, it remembers its current state. This part was not explained so well in the video: whenever a flip flop sees two zeros, it just keeps whatever its output was before. And then, when the voltage goes above 2/3 VDD, COMP2 fires, and that resets the RS flip flop. Let me know if that helps, and sorry for the confusion!

@@FriendlyWire ohhh now everythink is right! Thank you for the resposne and for this amazing video, you are excellent teacher!

@@szpaczeek7090 Thank you so much for your kind words, and I am glad you find my videos helpful! :)

Intermittent errors are always the hardest to spot... I am not sure. If is likely that perhaps the breadboard contacts were a bit loose and did not make proper contact. I have had the weirdest things happen on cheaper breadboards with unreliable continuity.

Thanks for the question! I am sorry but I don't really understand what kind of circuit you are looking for. Can you explain some more?

Thank you, sir

@@ekp_chinthaka9845 Thank you for your kind words! I hope to cover OP amps at some point, yes :)

You are talking about 8:19? Yes, the LED cathode is in row 12. The vertical black wire from row 12 to pin 1 of the NE555, and the horizontal black wire across to the right side (also row 12) are the "ground rail." See also at 8:34 how the 9V battery is connected. Hope it helps!

@@FriendlyWire Such a legend you are.... Thank you so much..😊😊

@@Syeda-Hadia Happy to help! :)

Good question! The flip flop is a memory, so if both inputs are low, it remembers its previous state (if it was ON, it stays ON, if it was OFF, it stays OFF) . Hope that helps, and sorry for the confusion :)

We all have to start somewhere :-) If this is too advanced, start with a battery, a wire, a switch, and get it to work, and then take it from there. I truly believe that you can learn it, if you want to :)

Hello, glad you found this video! :) Yes, you totally could, that's a great idea! This type of dimming is called "pulse width modulation" and R1 controls how long the LED is on, and R2 controls how long it is off (for more details see here: www.friendlywire.com/tutorials/ne555/#ch2 ). You just have to make the overall frequency of the circuit much higher so the blinking appears like a decreased brightness. Typical PWM frequencies are a few kilohertz (aka 1000 oscillations per second), so you could replace C1 from the 22uF to a 100nF to see what happens :) I have not done it in person, but it would be a cool project! :) Let me know if you have other questions or if I did not explain it well, I will do my best!

@@FriendlyWire I din't expect such a quick response, tysm :) You really explained it very well and no one else explained the circuit schematic so well :D Also, I hope the PWM thing works for me!

@@tamaghnadas8370 Happy to help, and thank you for stopping by! Definitely let me know how it works out :) One thing to keep in mind is that if you only vary R1 or R2 (i.e. change the on-time only or the off-time only) then the total PWM period will change. Perhaps it is better to think of R1 and R2 as the two halves of a potentiometer, so that R1+R2 is always a constant so you would have a fixed period PWM. Hope it makes sense! (If not let me know and I will try to explain it better!) If you have social media it would be so cool if you could send me a photo of your project @FriendlyWire , I would love to see it! :)

@@FriendlyWire I do not think R1 and R2 can be seen as two halves of the potentiometer :( R1 has it's significance. However, R2 (the pot), I suppose, can serve in two ways- it's one half for charging C1 and the other half for discharging. Idk though if R1+R2 remains constant in such a connection, if I'm making sense at all-

@@tamaghnadas8370 I am not sure if I understand. If you use the schematic at 5:09 you can see that C1 charges only through R1 and discharges only through R2. So my suggestion is this: remove R1 and R2. Then, connect the center tap of a potentiometer to pin 7 of the NE555 and to the anode of D1. One of the outer connections of the potentiometer goes to VDD, the other one goes to cathode of D2. Shouldn't that work? :)

You are right! Thanks! I included this remark in the pinned comment.

Glad you liked the video! :)

Sure! Take the formula at 10:10, and fix C1 to be 47uF. Then choose R1 accordingly. To get your times you need R1=8.7kOhm (450ms), R1=6.8kOhm (350ms), R1=4.8kOhm (250ms). I would recommend a 4.7kOhm resistor and a 5kOhm potentiometer in series, then you can adjust between all these times. Hope it helps!

@@FriendlyWire thanks bro

@@FriendlyWire I am a new subscriber

@@dhanapallayya254 Happy to help! When you build the circuit and take a photo, feel free to tag me on Twitter or Instagram via @FriendlyWire , I would love to see it :)

Oh yes, absolutely! We only scratched the surface in this video, there is so many other things you can do! :)

Great work, thank you for sharing! (For some reason I just saw your comment just now...)

Bob Ross has spoken :D

Thank you! I will try to speak more slowly. I was worried that if I speak too slowly people might get bored, apparently I overcompensated. When you click on settings, you can change the playback speed to 0.75, does that help at all? Thanks, and have a great day!

Ha, thanks Ian. In my earlier videos I was worried that if I talk too slow people would get bored. I am still figuring many things out, so I will keep it in mind for the future, thanks for sharing. On these older videos you can set the playback speed to x0.75 in the video options. Also I have a very detailed companion article on my website (www.friendlywire.com/tutorials/ne555/) where you can ready everything at your own pace. Thanks again, and happy holidays!

Thanks for the feedback. Not sure if it helps, but when you click on video options you can set the playback speed to 75%.

Don't worry @FriendlyWire, i think he is dumb. Love ur video ❤

@@neilaryaofficial Glad you like them, thank you. People have different communication styles :-)

I like videos that pack a huge amount of information in as little time as possible. You can always rewatch if you miss something

@@ColossusEternum Thanks, I am glad you like the style of the video :)