Yep, I see your poinit.... the fact that it's hooked to the house isn't a problem, necessarily..... except to jump in it to move it or a quick drive I realy dont necessariliy want to tun on the house just for the camera..... no biggy as you piointed out....
My bigger problem was that i just couldn't figure out how to turn the thing off!
A switch or a relay would be great, but I'm not sure that that is a project that I'll ever be able to work down my list far enough to make happen....
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