I have a new aftermarket radio I just installed in the car it features carplay/android auto and hdmi in with a rca to hdmi adapter.
I had it professionally installed and everything works fine until I plug in a fire stick to the hdmi input the video and audio work but I get really bad ground loop noises because it needs to get power from a cigarette to usb adapter for power the normal usb ports won't power the stick. I get video and audio but again the noises are really noticeable.
I'm trying to find the right usb isolator for my application but alot of these adapters on amazon say they're rated for 1 or 2v which I believe the stick needs 5v and/or the amp rating is way too low. I'm not an expert and I haven't bought anything yet I just want to make sure I buy something that'll work for this application I don't want to blow the adapter or worse something in the car, any advice would be appreciated.
I had it professionally installed and everything works fine until I plug in a fire stick to the hdmi input the video and audio work but I get really bad ground loop noises because it needs to get power from a cigarette to usb adapter for power the normal usb ports won't power the stick. I get video and audio but again the noises are really noticeable.
I'm trying to find the right usb isolator for my application but alot of these adapters on amazon say they're rated for 1 or 2v which I believe the stick needs 5v and/or the amp rating is way too low. I'm not an expert and I haven't bought anything yet I just want to make sure I buy something that'll work for this application I don't want to blow the adapter or worse something in the car, any advice would be appreciated.
How do you know the noise problem is caused by a ground loop, and not from the SMPS generated noise inside the USB power adapter? Do you have a schematic of how you have the USB power and signal wiring connected to the firestick, the power adapter, and the radio USB input? Do you have a link to the power adapter so we can see what it is exactly?