Classic Circuits You Should Know: Tone generator

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Күн бұрын

Classic Circuits You Should Know: Tone generator
A simple oscillator circuit built with 2 caps, 2 resistors, and the good ol' 555 timer can be a clock generator, tone generator or replace the speaker with an led and it's a simple flasher.
HEY YOU ABOUT TO POST SOMETHING STUPID:
Yes, I know my hands are large/fat. It's because of a heart condition I suffer from called Congestive Heart Failure. Here's a link to some information about CHF: cle.clinic/2TdS2Ux
One of the symptoms is that is causes fluid retention, mostly in the hands, feet/ankles, and face.
It will kill me one day. I'm doing ok right now, but someday...
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Пікірлер: 103

@isoguy. 5 жыл бұрын

I could watch your educational vids 24/7, you explain the principles in a manner that is easily understood by newbies. Thank you for taking the time to explain how this circuit works.

@johnrenwick5464 3 ай бұрын

I love your easy to understand videos for hobby electronic enthusiasts like myself. The reason i'm watching this video in particular is because I want to construct a tone generator to irritate the constantly barking dog next door whose owners are not interested in doing anything about. So I'm trying to find the most annoying high frequency tone or 2 dissonant tones as in a binaural beat and I want to incorporate an amplifier and a sound horn plus large speaker to irritate the shit out of it! Thanks again

@idiotwithasolderingiron 5 жыл бұрын

This was the first circuit I built as a kid making a cigar box keyboard. A very useful circuit with endless uses.

@MCsCreations 5 жыл бұрын

Really interesting, dude!!! But your neighbor's dogs should love you right now! 😂

@Gazz_R 5 жыл бұрын

Much love for the good old 555. Thanks for sharing Paul, all my best to you and your family.

@Dan-tv1sm 5 жыл бұрын

Thanks for another very informative video (as usual). Please keep posting them.

@tatterdemalion898 4 жыл бұрын

Thank you for creating this playlist! We are so caught up in digital electronics, we forget the beauty of classical electronics. I will binge watch this playlist and make the circuits!

@g00glian0 5 жыл бұрын

The Schmitt trigger explanation just changed my mood, to awesome! Super great video, informative and funny!

@PhG1961 5 жыл бұрын

Great video, as usual. Nicely commented and well explained. Thnxs for sharing !

@martin-wallace 5 жыл бұрын

Great Video. I love the 555 because it is so versatile and fairly simple to understand when you get down the in the innards.

@georgegates526 4 жыл бұрын

Great job leanelectronics! The explanations of electrical functions were fantastic!

@joeyscott4299 5 жыл бұрын

Cool ! I'm pretty new to making my own circuits and this helps me big time ! I'm going to make a board with a few oscillators to experiment with different sounds . Thank you and have a great one !

@Pyridox 5 жыл бұрын

Thanks. You are right, the 555 timer is versatile. I ordered several of them to play around with. They are used for a lot of different types of circuits, there are books out there with circuit diagrams.

@mikeoliver3254 5 жыл бұрын

I use a 555 for button/switch denouncing on most projects that do not use a micro controller, works fantastically. The only time I use a schmit trigger is when I have several buttons that need to be denounced. I actually try to use a 555 in every circuit I can. Great video Paul.

@the1nonlycrazi 3 жыл бұрын

This is awesome, and just what I wanted to make. Thank you.

@robertcalkjr.8325 5 жыл бұрын

I have that circuit set up on my night light board. Thanks Paul.

@doug.a.2665 5 жыл бұрын

thanks for that Paul ..really enjoyed it!

@stickz9871 5 жыл бұрын

This is nice, I've been wanting to make a simple circuit that can play different sounds.

@Venomator. 5 жыл бұрын

Classic! Really like the ‘555’ stuff you do Prof... 👍🏻 💚 🐍

@learnelectronics 5 жыл бұрын

Thank you, it is my favorite IC in case you hadn't figured it out.

@Venomator. 5 жыл бұрын

learnelectronics - You’re kidding right? 😂 By the by - was early evening here when first watched, if you’re interested Paul... 👍🏻 😉 🐍

@HazeAnderson 5 жыл бұрын

Woo hoo! I think I understand line level output now and can share. The output from pin 3 is going to be just under the amount of voltage you power the 555 chip with. That's plenty of voltage to drive an 8 ohm speaker but it is too much voltage for professional audio gear, whose signal will ultimately need to be amplified but not while it is being used by a load like a mixer. Or perhaps the tone generator is the load ... whatever ... the point is we just need to "tone" down the voltage a bit (-4dB) by running the output from pin 5 across a 10uF cap to a voltage divider with 10K from the cap to the output and a 4K7 from the output to ground (using 9volt battery). Sounds NICE!! 🔊😬👍

@villy8778 Жыл бұрын

Excellent video. Subscribed

@danielrine3103 5 жыл бұрын

Hi First time viewer, very interesting video, great job in the presentation... keep up the nice job...

@nigeljohnson9820 5 жыл бұрын

Sine wave tone generators sound more pleasing to the ear. The advantage of the digital tone generators is that they only need a single component value change to change the frequency. One solution to this problem is to use resistors and a ring counter to synthesise a pseudo sine wave. This approximate sine wave can be improved by applying a low pass filter cutting off below the switching frequency, but above the tone frequency. The advantage of this method is that the filter component values do not need to be that precise. The disadvantage is the accuracy needed for the wave form setting resistors. For siren tone generators, I prefer to use more favourable quad Schmitt trigger, followed by an RC or sallen-key butterworth filter. By using a quad Schmitt it is possible to use one gate to modulate the cadence or frequency of a second being used as the primary tone generator. This allows the synthesis of the De-Dar sound. Add a single transistor to the feedback path and the frequency can be modulated into a rising a falling tone, making that well known wailing sound. In fact the quad Schmitt has the potential to form four independent oscillators or use three as oscillators and one as a mixer/buffer or switch. The advantage of using a sallen-key low pass filter is that it is easy to make the second order version. Both resistors can be the same value and the capacitors are in a simple 2:1 ratio, allowing this to be implemented by putting two of the same value in parallel.

@jerryp1012 5 жыл бұрын

Very cool. I need to look into the 555 more

@tamarabarnett9869 Жыл бұрын

Enjoyed that.Thanks.

@Keeping_IT_Simple 5 жыл бұрын

best asmr video in ages!

@rolandberendonck3900 5 жыл бұрын

Nice circuit Paul! I've been looking a long time for how to control the frequency for the 555 timer and this one does that. And funny enough the only thing that is changed to this circuit is the 10K pot R2 that is connected to ground if I am right. Very nice!

@maddiemonster 2 жыл бұрын

Thank you for this video. I’ve started electronics as a hobby and this is such a great video. Subscribing to you!

@captainamerica949 2 жыл бұрын

You are the best youtuber, thank you for the videos :)

@learnelectronics 2 жыл бұрын

Wow, thanks!

@josedominguez2021 5 жыл бұрын

Wow... A digital converter.... Exelent!!!

@icenesiswayons9962 5 жыл бұрын

I know that ic very well. RCA had it in all their CRT TV's. Actually all digital tunning TV's had them. There are so many circuits it can be used in, to where if it were a person, it would have it's place on the walk of fame. You could do a different circuit everyday for a month and still have many left to talk about. The 556 and op amp's too. Perfect subject!

@workingdb 5 жыл бұрын

Cool, I am making effects pedals and can use this for an audio probe. Thanks again...

@ozgurileri2966 5 жыл бұрын

Really good instructions, like your videos completly. I am a chemist, can i build and ultrasonic mixer with that build? I think I can but felt like I should ask before.

@rdmlm77 2 ай бұрын

Thank you for your videos! I appreciate your channel! And I'm learning a lot with your "Basic circuits you should know" series!! Here is my though, I think that maybe there is an error in the schematics drawing. The potentiometer wire have to be connected between the pin 2 and capacitor 1, not between C1 and ground. Otherwise, how the potentiometer would discharge thru the pin 7?

@eriklaken1025 5 жыл бұрын

Great! :)

@georgechambers3197 5 жыл бұрын

I really like your 555 videos. But my tinnitus doesn't really like them much. How about just showing the frequencies on the meter or scope without the speaker hooked up? Thanks for another great circuit and video!

@micarifamily1 3 жыл бұрын

Sorry buddy hope all is well take care!

@rrowan327 5 жыл бұрын

Nice 555 Circuit. I do have a headache now, like Jack Ham just tackled me. :)

@learnelectronics 5 жыл бұрын

Jack Ham, heck yeah!

@redfishervictoria 5 жыл бұрын

Your Jedi mind powers are strong...I should know this Circuit...I will learn to build the Tone Generator.

@learnelectronics 5 жыл бұрын

Lol yes

@MalagasOnFire 5 жыл бұрын

Very good tip with interference of the meter in the 555. it's impedance adds up to the circuit. :P Sorry to ask but the capacitor in pin 5 should be connected to ground? it is in the typical application on the datasheets

@michaelpadovani9566 5 жыл бұрын

Another 555 circuit, love it! I wonder if the founders of the 555 *really* understood at the time the wide variety of circuits it can be applied to. It's so many things (Schmidt trigger also, as you mentioned) wrapped up in one 8 pin IC. Even a noise maker :)

@learnelectronics 5 жыл бұрын

Probably not. After all they just called it a timer. And it is. Run it in mono stable mode and it's a great programmable timer. Run it bi stable and you have something else. Run it astable and it's an oscillator.

@TheUnofficialMaker Жыл бұрын

i think so, they designed it to be versatile. Who knows?

@jeffzin5779 2 жыл бұрын

Nice Job! I want to use this circuit as a Signal Injector. Where would be a good place to hook-up a Probe?

@arcadebuilder533 3 жыл бұрын

Is there a version of the astable multivibrator that is less sensitive that could be used for frequency control with band pass filters?

@Asyss_Complex 5 жыл бұрын

Hi, since you are very experienced can you make a video about capacitors? Now I’m buying capacitor assortments for my future projects but I wonder which should I get. I already know the difference between ceramic and electrolytic capacitors. But I know very little about Polyester film capacitors (green ones) and polypropylene capacitors (reddish brown ones). Why are there some capacitors of the same type made out of different materials? Thanks!

@cajuncoinhunter 4 жыл бұрын

almost 30 years ago I built a 1 kc tone gen. and used it for setting modulation in cb's it was in a small plastic project box and I put a speaker jack on it so I could plug in a ext speaker... Would it be possible to put a BNC jack on the box and inject the tone into a car stereo circuit to check op amps and transistors with a signal tracer with a sniffer probe ????

@frang342 5 жыл бұрын

Hey Paul, at first banggood was good,but everything has gone south with them. I purchased a dig signal function generator and it came in missing 3 of the main capacitors which I didn't have in my collection,so I purchased some capacitors from banggood in a kit.I was able to replace 2 of them but still missing 1,got no help from banggood .then I purchased diy inductance meter kit and it came in missing the main large ic chip that runs the meter.now I bought a 80w 220 to 24 v transformer along with a small robot kit for my grandson and the robot arrived in pieces with no transformer and now banggood is giving me a hard time about it and I feel like I'm gonna end up eating it ,just like on the other items. wish I could talk with you Paul I could use some help.I'm a disabled vet I live on a fixed income my family have been great on helping me purchase my electronics since I got back into it while watching your program,which has helped me out a lot ,thanks to you paul.I no there isn'tmuch I can do about it ,I'm just very upset about this because I have purchased everything else to build my own D.C. power supply from banggood all that was left was the transformer.so I have a function generator that doesn't function,a dig inductance meter that now is spare parts, and a D.C. power supply with no power supply.frustrated in upstate ny. Paul thanks for your videos ,I wasn't in a good place ,until I was watching your show on KZfaq one day and you got me back into electronics , keep it up my friend.

@TheUnofficialMaker Жыл бұрын

the capacitor on pin 5 should go to ground and usually they tie pin 2 & 6 together with the timing capacitor to ground. never seen this variation.

@gapadad2 5 жыл бұрын

@ 6:47 "Did you see the frequency shift?" :) No , but I heard it.

@kevfrets 5 жыл бұрын

Holy Schmitt!! Sounds like the dentist 🦷

@thewonn 5 жыл бұрын

Hi, can this pulse a irfp460? If so, how to hook up, if not, do you have a circuit that can? Thnks

@acmefixer1 5 жыл бұрын

In the astable circuit in the datasheet pins 2 and 6 are connected to each other. But in the circuit in this video pins 2 and 6 are not connected at all. Pin 2 is connected to negative through a capacitor. I think there is a mistake.

@a3ohneiackelinoackeloniack358 Жыл бұрын

I cant find these Playlist on your channel. And also not the Oscilator-Playlist you talk about...Maybe its my fault, but if threre is any to fix, you my check But ever again nice. thank you

@naderhumood1199 3 жыл бұрын

Great project... SIR. How did u measure the frequency, by multimeter.

@learnelectronics 3 жыл бұрын

Yes, some meters have a frequency counter.

@jamest.5001 5 жыл бұрын

Making my dogs go crazy!

@viajorastral893 5 жыл бұрын

I need to generate different tones on the same circuit. Can you help me?

@charlesklein7232 5 жыл бұрын

im interested in making videos and spent an enormous amount of time trying to find a web or camera. one of the things ive seen here is that you have some type of camera that you can zoom in or out with on remote? what type of camera are you using ever thought of doing a video on what type of gear you use.

@zecko9534 2 жыл бұрын

Am i able to use electrolytic capacitors instead

@melplishka5978 3 жыл бұрын

Hahahahahaha needed this one lol. My neighbour is a complete douche lol. Great vid bud.

@melplishka5978 3 жыл бұрын

Next you need to show us how too make a crazy loud amplifier circuit lmfao.

@bblod4896 5 жыл бұрын

There must be DC on the output because the speaker jumps up. Could you put a capacitor on the output to see if anything changes? Thanks for the Sunday video.

@learnelectronics 5 жыл бұрын

It's pure dc

@bblod4896 5 жыл бұрын

@@learnelectronics Guess, what I should have said: Is the square wave riding on DC?

@derfg1502 5 жыл бұрын

Could you please do a review/teardown of the Southwire 14070T multimeter? I can't find a review with its weight on this meter. PLEASE HELP

@learnelectronics 5 жыл бұрын

If I come across one...

@marv4895 3 жыл бұрын

how are those tiny caps 2.2uF?

@joeshort9658 2 жыл бұрын

So what happens if I change R1 or C2?

@laurawerner 4 жыл бұрын

I'm very late to this, but.... Is that schematic right? You have the connection from the "bottom" of the R2 going to the ground side of C1 rather than to the pin 2 side of it. That means the capacitor is never going to charge. The current that would charge it -- coming from the 5v rail via R1 and R2 -- is going directly to ground instead. Shouldn't it be connected directly to pin 2, i.e. on the 555 side of the capacitor? (That seems to be what you to have on the breadboard.) Or is this a new, clever way to use the 555 that I don't know about. (Not trying to be snarky; I'm a total n00b so it's entirely possible I'm missing something.) Another fun circuit to do might be an oscillator with just a schmidt trigger chip (like a 74HC14) plus a capacitor and a resistor or two. I think I've seen that one somewhere.

@andyjohnson4485 4 жыл бұрын

So how would you adjust the freaking volume? Maybe you could show us that bit first!!😱

@midnightrizer 3 жыл бұрын

is that cap kit you have of ceramics?

@learnelectronics 3 жыл бұрын

Yes

@certified-forklifter 5 жыл бұрын

awesome! the 555 is the most produced ic Did you know?

@rolandberendonck3900 5 жыл бұрын

Hans Camenzind still rules!

@certified-forklifter 5 жыл бұрын

ok... @@rolandberendonck3900

@robertcalkjr.8325 5 жыл бұрын

My guess would have been the 2222.

@certified-forklifter 5 жыл бұрын

could be, but the ne555 is available since 1972 :) , but the 2n2222 since 1962!!!@@robertcalkjr.8325

@robertcalkjr.8325 5 жыл бұрын

Yep, 10 more years of sales than the Trip-5. I think he meant IC's other than the venerable transistor.

@richardbeckwith4545 4 жыл бұрын

I’m a real amateur so apologies if I’ve missed something, but I’ve built the circuit as drawn and it simply doesn’t work?! Looks to me like the side of the variable resister that is connected to the ground side of the 2.2uF capacitor should be on the IC side of Same capacitor? I’m thinking I must surly have missed something as the video is a year old and several people have suggested they’ve built the circuit but not made similar comments?......

@christiannielsen3863 5 жыл бұрын

may be a stupid question, but what should I search for to find that speaker thing? is that tone generator or is your whole circut a tone generator?

@learnelectronics 5 жыл бұрын

The whole circuit is a tone generator.

@christiannielsen3863 5 жыл бұрын

@@learnelectronics and the round speaker with the blue and white lead is just at "speaker"?

@robertcalkjr.8325 5 жыл бұрын

The poor little PUT - it never gets any love... My DCA75 Pro still doesn't even recognize it.:(

@timka880057 5 жыл бұрын

Lol. a little basic synthesizer, just needs a VCF filter and a ADSR envelope generator.

@learnelectronics 5 жыл бұрын

I have been wanting to get into synths. The ADSR envelope is on my list of things to learn.

@timka880057 5 жыл бұрын

@@learnelectronics I just rebuilt a ARP Odyssey 2813. I think it's a 72-74.. I've had it for decades. The power supply caught on fire years ago and I put it up, figured I'd fix it one day. Also a Korg Polysix. I've got other synths I've played for years. I'm fixing to work on a 83-84 Roland Juno 106. The voice chips go bad in those. I'm going to try the acetone bath and go from there...hopefully it's a success. On the Arp Odyssey, I had to change out the chips and caps, realign it, the Tantalums were destructive that caused my power supply problems to start with...so I put in tiny Panasonic electrolytics. It works great now. I've uses it on a few recordings. It's an amazing little synth! It's worth allot I found out and I decided I'd get it going again. I'm looking into a Moog 1. I love those synths.

@misaelrocknroll69 2 жыл бұрын

I want to make this like a 13 note piano,

@andyg873 5 жыл бұрын

When this showed up in my feed the number of views was at 555...

@learnelectronics 5 жыл бұрын

Hmm you should buy a lottery ticket

@bud03038 5 жыл бұрын

Good Morning WQ1I 73'S

@learnelectronics 5 жыл бұрын

Good morning WW8PR 73's to you my friend.

@gartmorn 5 жыл бұрын

My dog and cat didn't appreciate this video! Wife wasn't too impressed either! I'm hard of hearing after a lifetime in a noisy power station so I didn't know what all the fuss was about!