🔊 How to make an LM386 audio amplifier circuit
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- čas přidán 16. 01. 2017
- How to use the popular LM386 class AB audio amplifier IC to build a simple mono 1 watt audio amplifier. It costs less than $3 in parts!
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LM386s on Amazon: www.amazon.com/exec/obidos/AS...
Circuit diagram: bit.ly/2kep7h9
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#Electronics #Engineering #Amplifier - Věda a technologie
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You have a great radio voice!
Thanks! It's the product of many hours of work for every voiceover.
Indeed, my native language is spanish and even so I did understand every word you said, thanks for take your time to do this video the best way you can!!
I was just thinking this on one of his other videos.
I hold a BSEE and I just wanted to let you and your viewers know that you do a fantastic job with these videos, I only wished that I had these kind of resources when I was first learning this type of stuff.
You are my hero. I'm an art major taking an electronic art class and we're using arduinos and I've got no idea what I'm doing but this helped a lot!!!
Never stop making videos, you are a much better teacher than anywhere else on the internet
I used one of those on my research project back in 1985. Worked good. It amplified my Votrax speech synthesizer controlled with a Radio Shack MC-10.
i love the simplicity of these videos, keep up the good work!
BoomBrush me 2...
I found your channel a while ago, about two months ago I un-subbed from a lot of channels but I kept yours, THANK GOD!
About a year ago, I wanted to build my own radio. Well, I struggled getting started because I wanted more than a foxhole radio.
Well, maybe I will get back into it!
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that's awesome, wow im just watching his vids and i hope to gain lots of knowledge so i can build awesome stuff and save money and teach others
I wasn't sure who to believe as several other youtubers (who specialize in audio electronics) suggest 200-500uF output caps. So I tried it and the bass was way quieter than everything else. Replaced it with something over 1000uF as you suggested (2200uF) and it's fine now. It led me down the rabbit hole of realizing the cap and speaker form a high pass filter, so I can calculate the right values in future now. :) Thanks for the great tutorial video!
I made this amplifier. Very great sounding. Thanks a lot and may god bless you for spreading such usefull knowledge to all.❤
Cool!
You can use it to amplify any phone!
Except iPhone 7!
It will work with the dongle.
kissben
I know that, because I have one
You can add a bluetooth receiver that connects to that 3.5mm jack and you got yourself a bluetooth speaker.
And in 2020 when even more phone companies have "mustered the courage" it is almost a rarity to have a PROPER headphone jack....Thanks for nothing "FruitHeads"... ;)
Africantechmods, you rock bro! I built one exactly to your specifications and it works great. Greetings from Amsterdam!
Def building this as a project. Will document all steps, sims, etc., & make the case out of acrylic so it the work can be seen. Thanks so much! 👍
Yes! Been waiting sooo long for an awesome video like this.
Did you really say "After I was done beeing a striper" ? HAHAH!
***** I just didn't expect that.
Being a stripper is not a viable long term career.
Afrotechmods is it possible to have a pwm signal from a microcontroller be the input instead of the microphones that you have. would I have to change a lot at the input?
Afrotechmods I'm asking because a pwm signals isn't an analog signal so I'm just curious how it would work instead.
well it would sound like shit
Just stumbled upon this channel
B A man
A Lot of great info simplified into an easy to learn visual and audible electronic gold nugget
Right on man great job
I wish I could upvote this video twice. Well done.
Thank you for sharing this project! I've made an SMD version with EasyEda, JLCPCB and LCSC and it works just perfect! Maybe I'll publish an instructable!
... thank you for sharing your unique skills with us! Presentation flawless!!!!!!!!!!!!!!!
This one of my first electronic projects. I built one when I was 11.
I need more videos like this. I dont understand what all that means but it still entertaining to watch
That's cool, thanks for sharing it! So much to learn!
i really like how you explain what's going on and why and how to solve the issues. WEell done! :D
Just made this amplifier and it's working perfectly. I even added a potenciometer to adjust the volume. Thanks for making this video I've always wanted to make something like this
Yay! Glad you liked it!
Afroman is back! KA! Support the channel by clicking on the bell! This is a valuable channel. Hope your cat is doing well, pretty cat I remember...Pitchatu if I remember.
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Been looking for this for a while now, thanks a bunch
This was just what I was looking for! Thank you very very much!!!
thank u sir for suggesting the great courses plus.....
Excellent tutorial! The lm386 amplifier was my first amplifier I built 2 of them was used with 2 aiwa bookshelf speakers, very loud. No I have been building much higher powered amps, such as my 4,000 watt amp.But that's what I do now.
How on earth can you power a 4000 watt amp? I mean, you're lucky to get 1500W out of the wall and that's an entire dedicated circuit.
Wow this is the only set up that works. It worked for me. I bought a pack of 10 LM386 chips on Amazon I thought they came defective because never sounded loud and had a popcorn sound. But the way this circuitry is set up works perfect. Very loud
Great video! And I used to put a capacitor between pins 1 and 8 to increase the gain to 200, and that makes it a good electric guitar amplifier!
How it works??
Thanks for making this nice video. I build this circuit today and it works fine.
an other awesome video of one of the greatest explain brains on YT - thank you!
*tips fedora*
Again great video Afro :) thanks
wow you sound great, and thanks for the great and easy to follow video.!
You are wow, I came across the youtube videos for my project i.e. Parametric Audio Equalizer where I also need a amplifier. None of the video was clear as you explained, But you are video means a lot to me, thank you for sharing with us, great job...
superb, loved this.
Alright, very cool, that was a handy little video. Thank you.
Hi AfroTechMods, Good video. I like the old LM386 for small amps. I have built a lot of them and from John Audio Tech on YT I learned that you need to have a separate ground path for Input, Power, and Output. They should all junction right at pin 4, ground. His video is " LM386 and proper grounding". At best you can expect around .6 mW of output power. It is best to power them at 9 volts for heat dissipation. Do not use 4 ohm loads. 9 volts, 8 ohms and your golden, as John Audio Tech say's. Good to see a new upload. Be good, C.
Cass Virgillo but i have a 4ohm speaker :(
can i use a 4 ohm resistor in series to make 8ohms? I'm powering it with 5V dc wall adapter???
I think this is just what I've been looking for, other than I want a stereo amp. I'll have to make the adjustments. Always have loved the little LM386 amp IC.
You can just use two LM386 and feed one channel into each.
it looks good worth a go just for the fun of it. Thanks for sharing your knowledge.
Thank you! You're an amazing pedagogue!
I just love your videos...! They are very informative.
nice simple design, i just made one of these for an external speaker for my CDV 700 Geiger counter. works great and im pleased to be a subscriber to your channel.
Just love ur videos wow... The tutorial, everything abt it. Thank you!
hey welcome back ,keep it up
i love you and this channel!
I had a similar circuit to yours but it was a little noisey. After increasing a few cap values to match yours and adding that 100nF cap between LM386 pin 6 and ground instead of the RC combination I had, I have a very quiet circuit. Taking your advice to shorten up the wires eliminated the am radio station I was picking up too.
Thanks for your work, I have learned hugely by watching your videos. Just one thing: my son (13 years old) has built this amplifier, following your instructions. He has soldered everything and powered with a Hanmer HM305P, it works fine for some time, then boring noises start to litter the performance. Our hypotesis is that the power supplier, at a certain point, stops working properly, introducing annoying disturbs. We are planning to feed the amplifier with a battery but, in this meanwhile, a comment from your proficient side, would be welcome.
Nice video, keep up the good work! Thumbs up !
Just worked so fine 🙂 ..thank you so much
Thanks for sharing this Sir. Added 50k pot at input and works good.
Thank man, i made it watching your tutorial and using your schematic!
Does it work well
Another very interesting video tutorial. Keep 'em coming! Now I want to build this amp for myself. I guess I'll have to start looking on all of my salvaged electronic boards for parts since I am retired now on a fixed income. :-( Pulling components off of old computer boards, an amplifier and an old UPS power supply that smoked should keep me busy for a while as I continue to watch more of your video tutorials. Thanks for posting these interesting videos on electronics.
W Rusty Lane in eastern Tennessee (Witherington Place Railroad)
It made all the difference putting the caps across the power rails and adding one to the bypass pin
Great video. I was looking into amplifying output of my Helmet speakers. Trying to build something as small as possible.
Nice video, and well explained.
Great tutorial again. I will try it.
I want to learn a bit more about different types of microphones, how to use them etc... But I'm too lazy to read so I shall wait to see when it gets posted, or if ill get a comment saying there is already an extensive video on it. keep up the great work!
Works Beautifully!
this is extremely helpful, thanks
great video!!! thx for te stereo to mono tip.
you could also build two of those, one for each channel left and right and BAM stereo amp
Thanks , man , this is really nice!
I usually use TDA1554s for generic audio amplification purposes. 4x11W or 2x22W, just as simple to use as LM386 and still quite cheap.
TDA chips are rarity now.
@@richardlighthouse5328 what the heck happened in those 1.8 years since he posted the comment?
@@Razvii idk maybe died?
@@richardlighthouse5328 I meant what happened that made the ICs a rarity
@@Razvii Manafacturer marked them a obsolote
Thanks. This video helped me a lot.
another awesome video! thanks.
This is awesome!!! Thank you for this video..
great vídeo, compa
realy liked the video learned a lot
Awesome, great stuff !!!
I learned alot in this video, especially the dc output cancellation 😅
Like. Mine turned out well, on perf board keeping componenets close with lots of solder. Thanks for the confidence boost.
Great to hear!
"sounds like bieber" ahaha Auto-subscribed!! Love your videos!
Good informative video...Thanks!
Use two for stereo= twice as loud! Great video.
GOOD, NICE video! Thank you!
Playing this video on my new Amplifier... Thanks Afrotechmods!✌
its work done thanks sir and i add potentiometer befor the speaker its value between (1-5) k ohm and i can control the sound
would love to get such a video on higher power amplifiers built with mosfets and such
thq for awesome video im very inspired by you
Hi, I think your videos are awesome and I learn a lot in each one. What needs to change if I wanted to design a larger power amplifier?
He's learning on his own! Let's get him!
Connect pin 2 to GND with 150 ohm resistor, not directly. It will work better. Put 100uf capacitor in parallel with DC input. There is one in your diagram but we often forget it! And if you want bass booster, connect 333 ceramic capacitor (0.033uf) in series with a 15K resistor, and then connect other pin of 15K resistor to pin 1 LM386, and other pin of ceramic capacitor to pin 5. You can also adjust gain between pins 1 and 8. I usually use LM386 as preamp that can have up to 200 gain!
You need a capacitor in parallel to the power source, even if it is a battery. bypass is not needed (pin 7) and will most likely cause some more troubles.
Output capacitor should be 1000uf at least to get good bass and better working when placing 2.2 to 4.7uf capacitor value between your stereo to mono converter and LM386 input
Replace output filter 10 ohm resistor with 4.7 ohm.
Loving this channel!!
If there was a way to order supplies from a Canadian retailer and support these types up uploads, i would use it. ;]
This would be interesting to setup for my PC's beep speaker. I have it set to do a grub init tune however it's pretty quiet compared to IBM PC's of the 90's. Have it powered from a molex +12v
You've eased my intrest. I hope to do some small projects, then try 60 wpc or more stereo tube amplifier. Slow, going. I'll keep watching. I bought some Chinese junk and was out hundreds with junk that cost too much to send back. W
Muy bueno hermano, funcionó perfecto.
Hey Afrotech. Thanks for the vids I find them really informative. Just started with some audio amp and trying to wrap my head around it all. I was just curious if you could expand on a couple of things quickly. They are probably really basic so feel free direct me anywhere else. First how do you know what value capacitors you should be using? Why does the Capacitor filter the hig frequency rather then an actual High pass filter?
Hi, great easy to understand video. I really liked that you included the first version which gave unexpected results and then showed how to counteract that. I do have a question however, if i were to make this circuit for a stereo application could I just double up the circuitry to achieve the same result? Or should I add something else to counteract the coupling of the two signals for instance? furthermore how would I add volume/ gain control to a circuit like this and would it be possible to get gain control for two channels using only one potentiometer?
Thanks in advance, i hope you get to see my question.
Amazing... This video is one of the best of your channel... I love it
Now I realize how many speakers I had wasted before during the stereo to mono conversion but without the resistors!
Good project
I'm watching this and listening to it with the circuit I learned to build here. Sounds good but I need to use the 1000uf. It has a 450uf on a 4ohm 3w speaker. Sure a speaker box of correct size would change the situation also.
"After I was done being a stripper"
- What the heck did I just hear?
- Scrolls down to comments
very good video
Awsome vid ty. If we make two of these can it be used for stereo ?.
Hi Afro! I missed you a lot
I missed you too.
Me too
Thanks man