Can I get voltage sensitive power control?
I'm putting a wireless backup camera on my car hauler trailer and I want it to be powered up only when the truck is running. So I'd like to use the hot feed coming from the truck to power the trailer ...
Forum Discussion
Let's see if I have this straight.. You do not want a 12 volt SERVICE (house) battery, only the break-away battery for the brakes.. You will run your 12 volt systems in the house only off the converter (park model style).
Ok, this is easy
For the break-a-way battery use a Battery Minder, or Battery Tender to maintain it, These are very very slow chargers.. but you have weeks to bring 'em up to charge so that battery should, in theory, last a long time.. Make sure the unit you have does not have a time out function though.. (one of mine does). The time out function. if the battery is not fully charged within the time out period, it shuts down instead of continuing charge, you want one that continues charge till the battery is FULL up.
Now, do not connect the house 12 volt lead to the battery.
Isolate the Alternator (Tow vehicle) charge lead and use it to feed the camera.
The isolator in the tow vehicle will now control the camera's power.
This leaves you with 3 independent 12 volt systems in the trailer
1: Brakes (With battery)
2: House (Converter powered)
3: Camera (Tow vehicle powered).
Ok, this is easy
For the break-a-way battery use a Battery Minder, or Battery Tender to maintain it, These are very very slow chargers.. but you have weeks to bring 'em up to charge so that battery should, in theory, last a long time.. Make sure the unit you have does not have a time out function though.. (one of mine does). The time out function. if the battery is not fully charged within the time out period, it shuts down instead of continuing charge, you want one that continues charge till the battery is FULL up.
Now, do not connect the house 12 volt lead to the battery.
Isolate the Alternator (Tow vehicle) charge lead and use it to feed the camera.
The isolator in the tow vehicle will now control the camera's power.
This leaves you with 3 independent 12 volt systems in the trailer
1: Brakes (With battery)
2: House (Converter powered)
3: Camera (Tow vehicle powered).
