Hi everyone I’m building a Bluetooth speaker
I use a dial output power bank for power that provides power to a BT receiver board on one of the usb output
And to an upvolatage converter 5-12v powering a 40watt rms amp on the other side
I am having a pretty bad noise issue... i believe it has to do with the ground not being the same.
If I plug the bt receiver and up converter/ amp board to different power supplies I don’t have any noise
Any idea which pin should I short to Balance the ground on both my power bank usb power outputs if this is my issue...
Attached are some pictures
I use a dial output power bank for power that provides power to a BT receiver board on one of the usb output
And to an upvolatage converter 5-12v powering a 40watt rms amp on the other side
I am having a pretty bad noise issue... i believe it has to do with the ground not being the same.
If I plug the bt receiver and up converter/ amp board to different power supplies I don’t have any noise
Any idea which pin should I short to Balance the ground on both my power bank usb power outputs if this is my issue...
Attached are some pictures
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