How to solve EMC problems! || The mystery of the buzzing speaker

You want to know more about the Würth Elektronik EMC components? Then click here: bit.ly/EMCFilterKit_EN and order your design kit.
You can find the products shown in the video below:
Common Mode Chokes: bit.ly/CommonModeChokes_EN
Capacitors: bit.ly/caps_Catalogue_EN
Würth Elektronik “Theoretical Basics for Common Mode and Differential Mode”: bit.ly/askLorandt_CommonMode_EN
Useful application notes: bit.ly/caps_Appnote_EN
Specialist book “Trilogy of Magnetics”: bit.ly/Book_TrilogyOfMagnetics_EN
Previous video: bit.ly/WEcaps_EN
Subscribe to Würth Elektronik on KZbin: bit.ly/WE_YT_GS
Facebook: / greatscottlab
Twitter: / greatscottlab
Support me for more videos: www.patreon.com/GreatScott?ty=h
In this video we will solve the mystery of the buzzing speaker. The reason for the noises are of course EMC problems, aka electromagnetic compatibility problems. That is why I will explain the reasons for EMC problems, how to measure them and how to fix them as well. While doing so, I will not only talk about mains filter but also about other areas of the EMC. Let's get started!
Thanks to the Würth Elektronik eiSos Gruppe for supporting this video.
Music:
2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod
(incompetech.com)

[@SLLabsKamilion]

Wow, rare to see a video with such a chill sponsor. Great job Würth, thanks for your hospitality!

[@dl8cy]

After 1 minute of the german version of this video i switched to english - even i am a german native speaker, this german voice is so unfamiliar to me :-)

[@legominimovieproductions]

Me too😂 learning electronics in english is way more fun than in german :)

[@pcislocked]

same dood except I'm not native at both

[@plasmachicken]

Same

[@juliangunthnerprivat1868]

Ne too🤣

[@syamsthefullrainshade2558]

It's most like indian to me..lol

[@deadbird99]

As a bass player I've had such a problem lately because of a cheap PSU causing an annoying electrical hiss at high volume, which is amplified when I use distortion pedals, and I almost always do. Thanks a lot for this video!

[@greatscottlab]

Now you know how to fix that problem ;-) Thanks for the feedback.

[@deadbird99]

@@greatscottlab yes, even if I think I will definitely stick to the pre-built solution ^^

[@akash-zg4vj]

Davie504

[@deadbird99]

@@akash-zg4vj yes, but actually no. But you can still slap like now, or I will call the police.

[@akash-zg4vj]

@@deadbird99 ayyyyyyyyy. *Knife pointing*

[@carlosruizmora3111]

You definitely raised up the bar with this video. It kept me absorbed for its whole length (despite I was in the office). Thanks a lot, keep bringing more videos like this one.

[@shimonelstein7476]

Thanks for a great explanation. I'm a physicist / engineer. This was always a mystery to me, especially the common mode vs differential mode. You really cleared it up.

[@donepearce]

I hope this was a joke

[@herpingscienceandmore8506]

Hi great Scott you’ve told me a lot about electronics thank you for everything

[@greatscottlab]

You're welcome :-)

[@an1mesh]

When you're so early, the title changes in front of you (from German to English)

[@certified-forklifter]

He did two videos, one in English, one in German

[@greatscottlab]

it's a kind of magic

[@itsTyrion]

@@greatscottlab *Queen song starts playing in my head*

[@an1mesh]

@@itsTyrion which one! I love em!

[@GRBtutorials]

As well as the video itself.

[@Magic-Smoke]

Thanks for bringing up this very important topic. In most of the maker designs we see here on KZbin and elsewhere, EMC is never mentioned. Yet it affects us all on a daily basis, from interference on audio to degraded WiFi or other equipment performance. Moreover, you can even, unknowingly, affect your neighbours. I have friends who have tracked down interference on audio to faulty/cheap/nasty SMPS several houses away!

[@der_pinguin44]

Your English has changed so dramatically since I first watched you. Good work, and thank you for all the videos.

[@brianogram5194]

This is great information to share with amateur radio operators too. We're always chasing down RFI. Thanks Scott!

[@joczo97]

This is incredibly useful for ham radio ops

[@Hennir_97]

This was very insightful! Thanks for the time and effort you put into making this video. Keep up the good work!

[@LorneChrones]

Great intermediate video into the world of EMC!. A good thing to remember is that signal/power integrity/quality are inversely releated to EMC problems, if you have a well routed signal (tight ground return, matched impedances, length matching on differential pairs, etc), then your signal integrity will be solid plus that particular signal will likely be EMC compliant and immune to external interference. Win-win situations like that are certainly possible and desireable. If you can catch them early in the design phase (schematic & layout) then you'll be saving yourself alot of frustration down the road. Recommendation to definitely do a video on ESD / EFT in the future as that's another common EMC problem that EEs must face when designing products.

[@SkyhawkSteve]

I've used Wurth filter components in my professional life, and they have been very good. I'd also recommend Fair-rite for ferrite devices. For this sort of interference, adding a filter will get the job done but adds cost. If this was a production situation, the first goal is always to fix the device emitting the noise. For the hobbyist getting their first exposure to EMC, this is a fine introduction.

[@th34lch3m1st]

Great explanation. This is a solid reference for future research on my EMC problems. This video go straight on my electronics playlist. Thank you very much for sharing this.

[@greatscottlab]

You're welcome :-)

[@Viru5ZA]

Stay creative and I will see you next time! So inspirational and helpful, thank you so much!

[@therandomchannel9226]

Awesome! Würth did a great job advertising here

[@therandomchannel9226]

@@jkobain if you need any support from AVX, do let me know.

[@Audio_Simon]

This was excellent! I had a very similar problem making powered speakers and buying a cheap PSU brick on eBay. A genuine Toshiba one was much quieter.

[@JonathanDeWitt1988]

Thank you for the great introduction video Scott. It was very enlightening.

[@MCsCreations]

Fantastic work, dude! Thanks for all the tips! 😃

[@soranuareane]

I love this video; it's so informative. Please keep it up! I think the word you're looking for is "suppress" rather than "oppress".

[@jorditribo94]

This escalated so quickly. The last time i was here you were blinking LEDs with an Arduino.

[@askLorandt]

You deserve your nickname: you are a GREAT person and engineer! Excellent explained and reproduced. Was a GREAT pleasure from my side #askLorandt

[@lemonglataitor2123]

This video is great as always and helped me well!

[@IanGrams]

Wow talk about good timing. I recently got an HDMI audio splitter from Amazon and it seems ever since I plugged it in my speakers have been making similar noises. Not sure I can manage building a filter (even with a kit 😅) but I was considering trying out some snap ferrites. Thanks for the interesting and informative video!

[@pauljackson2126]

This video gave me better knowledge about EMC topic as compared to my book on the same subject... Loved your video and thank you for making this topic memorable for me

[@greatscottlab]

Thanks for the feedback :-)

[@TrollFaceTheMan]

Another interesting and informative video, thank you!

[@CShand]

Would love to see a video on load cells and load cell amplifiers, I'm always recalibrating them when someone bangs one and they drift awfully must learn more.

[@user-yw9fm7kb1s]

Your videos are so enjoyable.

[@GoSlash27]

Coincidentally, what you just demonstrated is my new job. I spent 20 years doing production testing and troubleshooting of avionics, and now I'm doing EMI testing for new designs. 2 months ago, I had never even heard of such things as LISNs.

[@ScienceFunInnovations]

So much information...going to have to watch that one again.

[@tejonBiker]

Big advantage to live in the same country as Würth, you can visit the facilities, wonderful kit!!!! very beatiful, I really like this type of advanced content

[@TheS1l3ntOne]

Thanks! I've been looking for it for my soldering station. Because it dims the whole room's lighting when I turn it on of off.

[@f.a3202]

I'm not the earliest one but i always watch your video's no matter what! And as always very good and informative video!!

[@greatscottlab]

Thanks for watching :-)

[@ExplodingWaffle101]

suprisingly educational for a video i thought was mostly gonna be about the sponsored content. good work

[@greatscottlab]

Thanks but that is what I always try to do. Content comes first, then everything else.

[@capnthepeafarmer]

Its like you were reading my mind! I was having issues splicing in a BlueTooth adapter to an old stereo and I kept hearing high frequency noise. I was able to rid most of the issues with better shield and wiring, but it still wasn't perfect.

[@PowerScissor]

I finally know what those bulges on my cables are. Ferrite rings!

[@greatscottlab]

Correct :-)

[@bendito999]

*notices ferrite core* owo

[@lnplum]

Or maybe it's just happy to see you

[@90FF1]

@C W That's what she said. :-0

[@jameswyatt1304]

Your English is better than my Deutsch ever was, but it was wonderful seeing the other version for a moment. Could you please include a link to your "other" versions of the episodes in your descriptions? I'd love to hear both, frankly as my fluency is gone and I'd like to try a little. Since I grok the content, I expect it'll be more approachable. (Kinda like setting an alternate language on my phone or FB.) Thank you for your wonderful series of very interesting and educational content. tschüß

[@peterpade6293]

thanks for the information. Well presented for this old engineer.

[@stephenphilp1380]

Thank you. Very informative.

[@0x9066]

Common mode filters are great for canceling unwanted stuff, even on high speed / differential transmission lines (USB, RS-485 etc.) In most cases I don't need them, but from my experience, It's a good practise to preserve some board space for these components.

[@larissamonroe21092]

@GreatScott You know, after I watched this, I went to Würth Elektronik, and got the sample(s), and I didnt expect it to be so robust, and everything, I did mention you, and how what you were doing here, is what I wanted to do, and I still didnt think they would send anything at all, from 10th today the 15th of Nov(as there was no delivery date or where it was really coming from nor a tracking number) , holy shnitzel pretzel! HOnestly I thought the package or box anything would have been smaller like literally half the size, they looked so small on the screen, both on here and the website. Enough for 10 of these boards, and 3 are gonna be used to see if I can fix my problem, and maybe even my work problem that will require 3 there as well, 6 already gone... And they are DAMN GOOD quality too! Not the cheap knock offs that one would get with samples, heardy and robust, and damn good case too! Thank you so much GS! I will damn well be ordering other things from them in the future... I hope you get something outa the referrals or something even more! Even after i buy more!

[@styrishrodrigues]

Hi Great Scott, please make a video on Logic Gates, it would be a great help for me.

[@shokdj1]

I needed this video for so long now

[@DarkElectronics]

Thanks for great video! Now I’m making own lab bench power supply, but it has EMI. Also my cheap Chinese power supply has extremely strong EMI. It doesn’t have any EMC filter circuit . So I try to design filter for it and my lab bench power supply with help of this video :)

[@jparky1972]

Did I understand it all? Nope! But Thank you for the insight.

[@bashaaksema94]

Tnx for this video! Now I know how to build the filters for SMPS and I can use it in my own design

[@LightSoySauce]

Thank you for an informative video

[@cornevanzyl5880]

Fantastic video man!

[@Zanderhawk11]

Ive never been so early to a video! Love you Great Scott!

[@greatscottlab]

Thanks for watching :-)

[@grins047]

Thank you once again GS.

[@pedritoordonez5246]

Thanks for sharing a great video

[@javiceres]

Great video Thanks!

[@jakeemattidore7601]

Above and beyond what was necessary for emc problems caused by your LED’s. Lol Love this video. Thank you for all your hard work

[@w4r10ck4]

Those kits are amazing

[@Alexandermichel1994]

Nice Video, i would be interested what kind of issues one would face when dealing with Microcontrollers as the typical hobbyist will not design his own powersupply.

[@bangadu_billa]

Dies ist eine gute Information. Danke Scott

[@electroscientist4447]

Great scotti is back love you 😍

[@pratikraghuwanshi5716]

Can you please make a dc current booster circuit , which boost 2amp of current to 10amp DC .

[@kekecjan]

That was a really interesting topic for today.

[@ZeroMass]

I've used those rgb controllers with a small rgb laser setups.. So many uses..

[@aaronlow1977]

I didn't know this company made a filter design kit. I need to buy a bunch of these.

[@naldosilva6198]

Great lesson

[@RahulJC]

First thing to do in the morning! Watch greatscott videos!!

[@Hex-Mas]

I have this issue with my rpi3. thanks for the video

[@sebastienchadal3937]

Great ! Excellent, well explain

[@electronic7979]

Very helpful video 👍

[@felixruiztorrez5192]

Really good video.

[@Gengh13]

Excellent video, great introduction to the topic. Those EMC kits look really nice, I'm guessing they would be expensive.

[@hugovangalen]

Google would reveal that Mouser sells them for €140 a pop. So yeah, a bit expensive for the average electronics enthusiast...

[@bitelaserkhalif]

Cheaper way is maybe to gut apart dead branded PSU (usually HP, Dell, famous pre built brands use good PSU which has EMI filter)

[@latonita]

Great Scott, did it help that cheap PSU when you inserted missing capacitors?

[@FaysalKhalashi]

Its another great video .... Thanks

[@cprn.]

On the subject of audio. Did you happen to try to connect helmet intercom to action camera? I've seen you trying an intercom before (BTW that video motivated me to get one, thank you, best riding related decision ever). I have this funky setup where I connect two microphones to the camera via 3.5mm splitter - one is next to the intercom's microphone recording my voice, one is near the right intercom's speaker recording its output. It's okayish and has an advantage of working with every kind of intercom but it's uncomfortable (I have 2 extra microphones and a splitter in my helmet after all) and the sound quality of the other party speaking is "meh". I'd love to know how to match all the signals and actually connect that intercom (both microphone and speaker) to the 3.5mm input of the camera. I'm pretty sure it's not (very) complicated, I just lack knowledge.

[@andymouse]

Interesting stuff...cheers.

[@iamZairul]

Ty for this info video

[@paulwilson4594]

You are a Legend! I owe my tinkering life to Folks like you who pour their knowledge and energy into great Production and videos that feel like hanging out with a Friend who is a Pro. Thank you

[@ExStaticBass]

You might be a bit mistaken. In the recent past I have used the head stator from a hard disk, a darlington and MOSFET based amp, and a small speaker to check for EMR in many of the devices I've built. The stator coil on the head armature of a common hard disk is sensitive enough to pick up the flux field and creates a strong enough signal to be usable through a standard microphone preamp. The only issue I've found so far is frequency. As some audio devices filter out anything above 20KHz it's sometimes difficult to accurately find and diagnose such things as back EMC. This is why I would recommend building your own amps because you can omit such filtration. This might make an interesting episode of your series "Build or Buy" because it's been a pretty useful tool for me so far since I built it.

[@laurentthiol]

Amazing, many thanks for this video ;-)

[@samda7109]

Nice video und gut erklärt.

[@ziadbrakat5421]

Great topic

[@zsoltpeterdaniel8413]

What can I do whrn I have the psu integrated into the speaker and it makes a 50 to 60hz buzz when idle and even when its the only device in the socket

[@simeonminkov6058]

11:58 that guy was using the same laptop as me right now. HP EliteBook 2740p are really cool!

[@FindLiberty]

OUTSTANDING

[@electroideas3255]

Nice video!

[@gusstavv]

This was a bit long infomercial... and quite educative btw! Thanks!

[@undefinedman2843]

What a great guy Can you tell me where do you learn these concepts and things

[@typeer]

V helpful as usual ty

[@sebrura]

Great vid. Question: The shield at 10:30, is it connected to earth through the mains cord?

[@user-xm1ts5dt9v]

What a interesting video!

[@StaticVapour590]

Had the problem with active speakers and external HDD causing interference. I heard the HDD noise from speakers with high pitched whine and popping. Solved by using only 2 prong adapters with similar specs

[@glennotropolis]

I know you are selling me a kit... But I LOVED IT

[@ozzymandius666]

Is the effectiveness of a radiation shield related to its conductivity? ie silver>copper>aluminium>steel/iron?

[@jannijp7]

It's so scary...i literally encountered that problem two days ago and coom, GreatScott uploads a video to solve the problem ^^

[@milanhlavacek6730]

Me too

[@mmmm768]

Me too

[@mmmm768]

Me too

[@mmmm768]

Me too

[@mmmm768]

Me too

[@thereare4lights137]

Is there a purchasing link for the EMC kit that was sent to you?

[@PeteOHair]

Howdy Scott, I wondered if you needed to shield from 50Hz hum in audio equipment and have solution for that? Idea for future video ;-) Thanks

[@keithking1985]

Another cool video

[@fstopspictures8834]

question the circuitry for conditioning between the preamp and adc are din module ?do i need sample and hold and mutiplexer in audio system ?

[@clee2423]

can you make a video how to make a isolated converter for PC-based oscilloscope that has no USB isolation ? : ), especially for cheap PC-oscilloscope

[@pomegranatechannel]

You pronounce "series" like "serious", was a bit confusing haha. Great project, I loved it.

[@pomegranatechannel]

@@jkobain I'll put a smile on your face.

[@recklessroges]

I was going to highlight: the past tense of wind is wound (not winded), for an electromagnetic coil, (but I can't find any reference material that supports my claim.)

[@pomegranatechannel]

@@jkobain "Winded" doesn't really mean exposed to wind (at least in North America). It means when a person is running out of breath. And is pronounced differently than winding meaning wrapping a coil.

[@pomegranatechannel]

@@jkobain No I was talking about winded not wound! Two completely different words.

[@vintasalo]

I NEED HELP: I'm spinning a DC generator and reading 9a/36v output. When i connect it to the panel charge side of a 10a solar charge controller the output drops to 3a/12v and still spinning at the same rpm. Where is the other 6a/24v ????

[@jigyashukumar2697]

Loved it awesome