0
$\begingroup$

Today I found a wierd thing that as I removed the pin of the echo dot enter image description here

And after this I removed the adapter from the power supply and found a wierd buzz sound coming from the adapter but as I connected this pin to Echo dot thinking that it would stop the sound and to my surprise The buzz sound faded with time and eventually died down.

So I know that the charged capacitor inside it is loosing its energy. But what is the mechanism after which it is creating this weird buzz sound?

PS- I have original adapter and the voltage supply in my area is also constant.

Please try to explain it simply I am a high school student

$\endgroup$
3
  • $\begingroup$ If I've understood your question right, it seems much more likely that it comes from the transformer in the adapter, as opposed to the capacitors. This is usually because the adapter's a cheap knockoff, or your AC power supply in your area's iffy. I find it's often a combination of both :) $\endgroup$
    – Philip
    Nov 24, 2020 at 17:49
  • $\begingroup$ @Philip This is the genuine adapter provided by the amazon and the area where I am living also has a constant voltage and doesn't vary that much. $\endgroup$
    – Anonymous
    Nov 24, 2020 at 18:13
  • $\begingroup$ I actually want the mechanism and precisely the element which is creating this sound $\endgroup$
    – Anonymous
    Nov 24, 2020 at 18:14

1 Answer 1

1
$\begingroup$

Philip is correct, as the charger is poorly grounded, what you are hearing is the main's hum produced by a ground loop.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.