I have a battery powered radio controlled aircraft. The aircraft runs at 16v.
I want to add a video transmitter that is built for 12v. I plan to use this regulator to supply the 12v.
+16v-------->| D24V5F12 |+12v---------> Video
GND---------| V. Reg. | GND---------- Trans
The 16v side also drives a camera and telemetry equipment built for 12-24v. That subsystem outputs a video signal. I have 2 questions..
I have this notion that subsystems running at different voltages must be isolated form one another, say, by a transformer. But I think the voltage regulator gets wired with a common ground, so it seems I am incorrect. Can subsystems running at differing voltages safely share a common ground?
Am I safe simply connecting the video out from a 16v subsystem to the video in of a transmitter running at 12v? The final wiring would be:
+16v-------->| D24V5F12 |+12v--------->Video
GND-------------------------------------Trans
Vsig------------------------------------>Vsig