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USB-C PSU Coil Whine
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USB-C PSU Coil Whine

by kb9ylw on Thu Apr 29, 2021 12:16 pm

My new Official Raspberry Pi PSU (product 4298 from order 2547203-2664768831) works but there's continuous high-pitched coil whine that's a bit distracting. Friends tell me that they've not had this experience with the official PSU.

kb9ylw
 
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Joined: Wed Mar 09, 2016 2:12 am

Re: USB-C PSU Coil Whine

by mikeysklar on Thu Apr 29, 2021 5:14 pm

I use this power supply myself on two different Pi4's without whine.

Does it whine when plugged in without a load source plugged in (like a Pi).

Does the whine occur when you use power from a different outlet/strip in another location in your home?

mikeysklar
 
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Re: USB-C PSU Coil Whine

by kb9ylw on Fri Apr 30, 2021 4:46 am

The wine stops when the Raspberry Pi 400 is shut down (though my ears ring for a while afterwards!) I've tried it on another outlet and get the same high-pitched whine.

kb9ylw
 
Posts: 2
Joined: Wed Mar 09, 2016 2:12 am

Re: USB-C PSU Coil Whine

by mikeysklar on Fri Apr 30, 2021 12:45 pm

@kb9ylw,

Thank you for the confirmation. Let's try another unit.

Please send an e-mail to support@adafruit.com requesting a replacement Pi power supply. Include a link to this forum thread and provide your original order number.

mikeysklar
 
Posts: 4559
Joined: Mon Aug 01, 2016 8:10 pm

Please be positive and constructive with your questions and comments.