Static noise from powersupply on TTGO web audio player

[larsdp]

Hi,

I’m a newbie I have a ttgo board with a webradio script installed. Everything works nicely when the usb-c power is coming from my imac, but when i switch over to a 220v power supply to usb-c to power the ttgo the speaker playing music is filled with low static noise.

Why is there a difference from the USB-C on my iMac to the power supply and what can I do to make the noise go away since its almost killing the audio.

Thanks in advance.

[LJH]

Could you show us more details about this 220V to typec adaptor？

[Sprite]

Make sure to use a brand-name high-quality non-fake power supply. Especially cheap and fake USB power supplies have horrible noise suppression.

[larsdp]

I'm using an 220v to usb power Apple adaptor and also tested a Samsung with the same result. What would you remcommend buying? Or would it be better to use the dedicated 5v input on the board with a classic power supply?

Thanks!

https://www.teknikdele.dk/upload/zoom/a ... ter-ny.jpg

[larsdp]

Not sure if my reply got send. I'm using an Apple 220v to usb and then a usb cable to usb-c aprox 10 cm long.
Also tried with a Samsung phone adaptor.