iceman2992
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Joined: Sun May 15, 2016 5:23 pm

Adapter Makes High-Pitched Whistling Sound

Sun May 15, 2016 5:31 pm

I just got a new Raspberry Pi 3 Model B, with a generic 5V/2A adapter
Everytime I plug it in, the adapter makes a whistling sound.
I only connect an ethernet cable to it, using SSH to login.
The sound stops when I shut down the Pi using sudo halt -h
Is this a broken adapter? Or is it OK? Will it break my Pi?

hello world :-)
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Re: Adapter Makes High-Pitched Whistling Sound

Sun May 15, 2016 7:04 pm

iceman2992 wrote:I just got a new Raspberry Pi 3 Model B, with a generic 5V/2A adapter
Everytime I plug it in, the adapter makes a whistling sound.
I only connect an ethernet cable to it, using SSH to login.
The sound stops when I shut down the Pi using sudo halt -h
Is this a broken adapter? Or is it OK? Will it break my Pi?
I honestly don't know, but some chargers (and other things) make whistling noises. For example, my HP laptop power supply makes that kind of whistling. So does my cheap phone charger. Never had a problem with them. My monitor makes a quiet humming noise when the screen brightness is near the middle (only the middle. Weird, huh?). My stereo set makes a quiet humming noise (and vibrates) too. The chargers are the ones that make the whistling though. So, I don't know if they're meant to, but some AC adaptors/chargers do tend to make noises like that. I was once fiddling around with LEDs and had connected some to an old phone charger. The charger whistled with only a few connected, but the more I added, the quieter the whistling got. Where did you get the adapter?
I do moral support. Here: https://www.raspberrypi.org/forums/search.php?search_id=egosearch
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iceman2992
Posts: 2
Joined: Sun May 15, 2016 5:23 pm

Re: Adapter Makes High-Pitched Whistling Sound

Mon May 16, 2016 2:04 am

hello world :-) wrote: I honestly don't know, but some chargers (and other things) make whistling noises. For example, my HP laptop power supply makes that kind of whistling. So does my cheap phone charger. Never had a problem with them. My monitor makes a quiet humming noise when the screen brightness is near the middle (only the middle. Weird, huh?). My stereo set makes a quiet humming noise (and vibrates) too. The chargers are the ones that make the whistling though. So, I don't know if they're meant to, but some AC adaptors/chargers do tend to make noises like that. I was once fiddling around with LEDs and had connected some to an old phone charger. The charger whistled with only a few connected, but the more I added, the quieter the whistling got. Where did you get the adapter?
I got the adapter from the reseller that I bought it from. My Asus laptop's adapter also makes a whistling sound, but not nearly as loud.
The Pi adapter's sound I can hear clearly from across the room.
Oh well I guess I'll see what happens. Thanks :D

hello world :-)
Posts: 121
Joined: Sat Nov 14, 2015 7:12 am
Location: England, in an insecure cloud, ie. The Interwebs
Contact: Website Yahoo Messenger AOL

Re: Adapter Makes High-Pitched Whistling Sound

Mon May 16, 2016 8:24 am

iceman2992 wrote:
hello world :-) wrote: I honestly don't know, but some chargers (and other things) make whistling noises. For example, my HP laptop power supply makes that kind of whistling. So does my cheap phone charger. Never had a problem with them. My monitor makes a quiet humming noise when the screen brightness is near the middle (only the middle. Weird, huh?). My stereo set makes a quiet humming noise (and vibrates) too. The chargers are the ones that make the whistling though. So, I don't know if they're meant to, but some AC adaptors/chargers do tend to make noises like that. I was once fiddling around with LEDs and had connected some to an old phone charger. The charger whistled with only a few connected, but the more I added, the quieter the whistling got. Where did you get the adapter?
I got the adapter from the reseller that I bought it from. My Asus laptop's adapter also makes a whistling sound, but not nearly as loud.
The Pi adapter's sound I can hear clearly from across the room.
Oh well I guess I'll see what happens. Thanks :D
You're welcome! If you want to be sure, why not email them or ask in the reviews?
Have fun with your Pi! :-)

EDIT: Forgot to mention. My cheap phone charger is also quite loud, although maybe not quite that loud.
I do moral support. Here: https://www.raspberrypi.org/forums/search.php?search_id=egosearch
I know I use too many parentheses. Problem?
Topics I have posted in: http://bit.ly/1NbDdr5
My topics: http://bit.ly/1ObnKqQ
All my posts: http://bit.ly/1OHzje7

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Burngate
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Re: Adapter Makes High-Pitched Whistling Sound

Mon May 16, 2016 3:32 pm

Inside an adapter is a rectifier (to change the AC into DC) an oscillator (to make it back into AC) a transformer (to reduce the voltage) and another rectifier (back to DC again)
The transformer is what's whistling.

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