I am just starting to extend my cameras in the woods to the lower part of our very wooded lot. There is a steep slope for several hundred feet that eventually levels out to a nice open, mostly grassy, area. I have already scoped out where the camera is going to go on a seriously sized oak. My plan is to extend my 40volt line from this tree (there are actually 2 cameras on this one and one of my $.30 5 port Linksys switches in that box)

The red line is the path starting down the hill. The box contains my 40volt line and the ethernet source (the Linksys). About 200-225 feet away there is a good point to mount my 'relay station'. Another box with a Linksys switch. As long as everything (except 12volts) is there I decided to put a cheap camera on the box to pick up whatever comes by on the hill. I just needed to install a 12volt buck device to get my power for the camera and separate IR source(s). Here is that box done and waiting for me to get eaten by the mosquitoes down there.

The 12 volts will go thru the black watertight connector on top for the IR. The buck device is fastened to the lower left wall and my Linksys is attached with velcro type material. I added a 12volt meter on the upper rigtht side so the deer would know its working. The red wire is a 'safety wire' between the lid where the camera is mounted and the box. That second hole on he bottom is now plugged. I was going to run my pvc conduit into the box and then out. With a conduit access 'tee' I'll be able to go up and back in one pipe / sealtite.
The box closed up:

From this box its another 150 feet or so to where the 'real' camera is going with its own IR sources. Using another 12volt buck device down here I am able to run 16ga wire even tho I figure my 12 volt current draw will be about 4+ amps. That will give me about a 4 volt drop, from 40 to 36, at the far end as there is only ~ a 1.2 amp draw at the 40volt side . The buck device will still put out 12.5volts even with <30volts.

The red line is the path starting down the hill. The box contains my 40volt line and the ethernet source (the Linksys). About 200-225 feet away there is a good point to mount my 'relay station'. Another box with a Linksys switch. As long as everything (except 12volts) is there I decided to put a cheap camera on the box to pick up whatever comes by on the hill. I just needed to install a 12volt buck device to get my power for the camera and separate IR source(s). Here is that box done and waiting for me to get eaten by the mosquitoes down there.

The 12 volts will go thru the black watertight connector on top for the IR. The buck device is fastened to the lower left wall and my Linksys is attached with velcro type material. I added a 12volt meter on the upper rigtht side so the deer would know its working. The red wire is a 'safety wire' between the lid where the camera is mounted and the box. That second hole on he bottom is now plugged. I was going to run my pvc conduit into the box and then out. With a conduit access 'tee' I'll be able to go up and back in one pipe / sealtite.
The box closed up:

From this box its another 150 feet or so to where the 'real' camera is going with its own IR sources. Using another 12volt buck device down here I am able to run 16ga wire even tho I figure my 12 volt current draw will be about 4+ amps. That will give me about a 4 volt drop, from 40 to 36, at the far end as there is only ~ a 1.2 amp draw at the 40volt side . The buck device will still put out 12.5volts even with <30volts.