iOSD mk II dual input ground question

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Got an F550 I am custom building with a thermal camera. Running an iOSD mk II as the iOSD so I can switch between the FLIR and a small FPV camera.

The FLIR runs off of 5V input from a BEC I am using. THe FLIR camera uses the VID1 & GRND pins on the input of the iOSD. The FPV camera uses the Power & the AV2 pins on the input of the iOSD.

My simple question is, can I use the ground from the FLIR to connect to the FPV camera? The FPV camera will not function without ground. But since they use different voltages, I wanted to make sure it wouldn't fry either component.

I hope my explanation makes sense.

Thanks!
 


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