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?
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