protocol217
Member
I am making a portable Bluetooth speaker with one 12v battery, and i have a Bluetooth receiver that is powered over usb, so i putted on a 12v to 5v car usb adapter and it works but it has a lot of noise, and when i put the Bluetooth receiver to power from another battery, i works perfect.
So i searched on the internet and find out that this is a common problem when using the same battery, and it is called ground loop, and that there are 3 solutions:
1 - use two battery
2 - use completely isolated dc-dc converter
3 - use a audio transformer isolator
So i think the best solution for me is a completely isolated dc-dc converter, and i found this 5v dc-dc converter but is this what i need ?
B0505S-1W 5 V/DC 5 V/DC 200 mA 1 W
**broken link removed**
If this is what i need i would put it on the output of 12v to 5v car converter is that correct?
So i searched on the internet and find out that this is a common problem when using the same battery, and it is called ground loop, and that there are 3 solutions:
1 - use two battery
2 - use completely isolated dc-dc converter
3 - use a audio transformer isolator
So i think the best solution for me is a completely isolated dc-dc converter, and i found this 5v dc-dc converter but is this what i need ?
B0505S-1W 5 V/DC 5 V/DC 200 mA 1 W
**broken link removed**
If this is what i need i would put it on the output of 12v to 5v car converter is that correct?