High Pitched Whistle from 5V 8A AC/DC Power Adapter

[JavaLaurence]

Hi,

 

Another PSU question. I'm hearing an extremely high pitched whistle from the PSU powering my LED strip. Since my LED strip is used in a wall clock, I cannot have *any* sound coming off the setup...

 

Googling for the subject turns up lots of hits, but I was wondering if there's anything easy I can do to this particular TF model to stop the whistling? I don't know enough about electricity/electronics to try different things..

 

Thx.

 

[batti]

Hi JavaLaurence,

 

how does this noise change if you change the load of the PSU? (by changing the number of LEDs used)

 

Bastian

[JavaLaurence]

The whistle attributes (pitch, volume) didn't seem to correlate with any loading of the LEDs. But after about 20 minutes the whistle faded away. My project has been running 24/24 for nearly a week now, and the whistle hasn't returned. So maybe the PSU simply needs to warm up a bit?

[batti]

Hi JavaLaurence,

 

typically whistle depends on the load of the PSU. Of course its temperature will also affect it. It is good to know that your whistling seems now to be over.