How to solve EMC problems! The mystery of the buzzing speaker
video description
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.
Date: 2020-09-05
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Comments and reviews: 9
First
My dad has a sound bar that is plugged into his TV and it works perfectly fine. I plugged headphones into my Dad's laptop and they worked perfectly fine. But I plugged the speaker using the same cable into my Dad's laptop and there was a noise coming from the speaker luckily my dad found a way to cast from his laptop to the TV so he didn't need to plug the speaker directly in. Also the audio wouldn't go through the HDMI cable.
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My dad has a sound bar that is plugged into his TV and it works perfectly fine. I plugged headphones into my Dad's laptop and they worked perfectly fine. But I plugged the speaker using the same cable into my Dad's laptop and there was a noise coming from the speaker luckily my dad found a way to cast from his laptop to the TV so he didn't need to plug the speaker directly in. Also the audio wouldn't go through the HDMI cable.
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#Reaper
I wonder how familiar or similar this is compared to PFC circuits? Is there even any difference? I stumbled up on that problem month ago when buying affordable but powerful SMPS for LED lighting at home (>75 watts and regulations/law. I would be interested in that topic. Anyone too?
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I wonder how familiar or similar this is compared to PFC circuits? Is there even any difference? I stumbled up on that problem month ago when buying affordable but powerful SMPS for LED lighting at home (>75 watts and regulations/law. I would be interested in that topic. Anyone too?
reply
Sebastian
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.
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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.
reply
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.
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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.
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kanishga
When i first watched this video i was like this never happens and found it boring therefore Skipped the video. Yesterday i found my old speakers started giving buzz noises when used on UPS battery and i know where to look; )
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When i first watched this video i was like this never happens and found it boring therefore Skipped the video. Yesterday i found my old speakers started giving buzz noises when used on UPS battery and i know where to look; )
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Lucio
So I've got led driving day lights on my van, now my radio fm and dab signal is is rubbish!
Got some ferrite cores but where's best to fit them on leds cables or back of the radio areial cable or both?
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So I've got led driving day lights on my van, now my radio fm and dab signal is is rubbish!
Got some ferrite cores but where's best to fit them on leds cables or back of the radio areial cable or both?
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Boris
2: 17 this was extremely helpful! I've been trying to figure out how to set up an AC to DC power supply and understood the rectifier half, but not the transformer part. Need more vids like this
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2: 17 this was extremely helpful! I've been trying to figure out how to set up an AC to DC power supply and understood the rectifier half, but not the transformer part. Need more vids like this
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Carlos
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.
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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.
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Noah
Yo at the end of every audio cut you take a breath and it's really distracting. I'm a big proponent of breathing but you gotta cut your audio jumps 3/16th of a second sooner
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Yo at the end of every audio cut you take a breath and it's really distracting. I'm a big proponent of breathing but you gotta cut your audio jumps 3/16th of a second sooner
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