10A 12V Power Supply from Adafruit Making Hissing Noise

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PBodyBrook
 
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10A 12V Power Supply from Adafruit Making Hissing Noise

Post by PBodyBrook »

Hello,

I recently purchased a 12V 10A power supply from Adafruit to power some NeoPixel strips.

The supply works just fine, but it puts off this fairly obnoxious hissing/squealing noise when under load. For example, right now I have 32 pixels wired up with a strand test running, and as the power draw increases, so does the noise from the supply. When the lights are off, it is silent. I have the wiring done according to the Neopixel Uberguide, with a 1000uF capacitor in parallel with the power output, and a 330ohm resistor in the data line.

Is this normal? Could there be an issue in how I have the wiring set up? I am working on a project for lighting in my office and as it stands the noise is a bit of deal breaker as it is so high pitched it really makes it hard to focus on work and gets uncomfortable quickly.

Thanks a lot in advance for your help!

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adafruit_support_carter
 
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Joined: Tue Nov 29, 2016 2:45 pm

Re: 10A 12V Power Supply from Adafruit Making Hissing Noise

Post by adafruit_support_carter »

Some amount of noise from these power supplies is normal. The environment can also affect this - even the actual power being used. We've had some of these returned and were not able to recreate the noise once back in the factory. So it's a tricky problem to sort out.

We can try sending you a replacement and see if that helps. Send an email to [email protected] with a link to this thread and your order number and they can send you a replacement 10A 12V power supply.

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