How to remove buzzing/noise from a cheap Bluetooth Music Receiver? (Experiment)
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange answerers and askers point people to it when audio from a Bluetooth module or amplifier has ground loop noise and they need to see how an isolated DC-DC converter fixes it.
Recommended by 3 people across 2 different months, 2020 to 2022.
What it is
GreatScott! investigates why cheap Bluetooth music receivers produce buzzing and noise, tracing it to a ground loop between the receiver and the amplifier. He tests fixes, including powering the receiver through an isolated DC/DC converter. It is a short hands-on experiment video.
What people said
Recommends Vishal · 2020-06 · Electrical Engineering Stack Exchange · on “Noise in audio amplifier”
@P2000 I tried, but I am unable to break ground loops. I found this YouTube video helpful [this video] but can you please explain to me how can I implement it in my circuit. I am really confused. Can you please explain how can I break/ isolate ground loops in my circuit. Thankyou
Recommends Umer Khayyam · 2021-04 · Electrical Engineering Stack Exchange · on “How to reduce audio noise from Bluetooth module”
The problem you are having is called 'ground loop noise'. The easiest solution is to use a single package DC-DC converter with isolated ground rails like B0505s to power the Bluetooth module. GreatScott has a good video on the possible solutions to the problem. Here's a link to the video: [this video]
Recommends bigjeff3889 · 2021-04 · Electrical Engineering Stack Exchange · on “How to reduce audio noise from Bluetooth module”
Not my idea at all but i believe you need a 5v-5v converter suited to isolating and/or converting DC power rails as per this video: [this video]
Cites nasty12312345 · 2022-09 · Electrical Engineering Stack Exchange · on “12 V isolated DC-DC converter connection”
I have a question about a 12 V to 12 V isolated DC-DC converter. I am trying to connect a Bluetooth adapter to my old Becker radio, but I got some annoying noise when it was connected. It turned out to be a ground loop, so I bought a 12 V to 12 V isolated DC-DC converter (B1212S-1W). Today I connected it and after I turned the radio on the DC-DC converter just smoked and got super hot, so I guess it's toast now. I connected it using the following diagram: [LINK] I connected GND (pin 1) to the main ground of the car and the Vin (pin 2) to the switched positive on the radio. I then connected -Vo and +Vo to the Bluetooth adapter's ground and positive cables. I guess I somehow shorted it, but sh