Do a search for "tank circuit"
I am looking for power options for a car pc. I would rather not plug into the car's power as I already have quite a bit running through the cigarette lighter - PDA Sat Nav, phone charger and hands free kit.
I had an idea of using one or two of those solar powered battery chargers and a second battery in the boot. I have also read on hear about split charging which could also possible be a solution.
could anybody give me some information on whether either of these options are feasible and any more information or advice you may have.
Do a search for "tank circuit"
EPIA Nehemiah M10k, M1-ATX, 20GB 4200 RPM 2.5", 256MB RAM, Win XP Home, Gyration RF Keyboard & Mouse, Zoltrix Nightingale Optical 4.1 PCI Sound Card, Lilliput 619GL-70NP, XM-PCR w/ optical upgrade, Garmin GPS-25LVS, Microsoft MN-710 USB Wireless NIC
will do - sounds cool!
What the hell do you mean by "rather not plug into the cars power" Where the hell else are you gonna get power for your computer from. Yes, I would not take power from the cigarette lighter plug (which appears to be overloaded already in your car) but the alternator is more the capable of providing the power you need for everything. You must get power from the battery. A carputer will PROBABLY not be able to run off of solar power with out a lot of panels, and lots of cash, solar panels are not cheap at all.Originally Posted by Gillas
A second battery is possible, though not needed at all. And, the circuit for a second battery is NOT a tank circuit, it is a battery isolator. A tank circuit was used int he past to keep the computer from rebooting when the voltage dropped in the car from cranking.
P.S. Read this
FAQ: Tank Circuits (Adding a Second Battery)
FAQ: Connecting your Car PC's Power and Speakers
and of course, this one is always nice
Attention Newbies! A FAQ to the FAQs
...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.
well if and when you put your carpc in you wont need your pda satnav and handsfree kit - if you do your setup right the pc will do everything you need.
Ok, after chatting to a guy at work it seems that what I need is a split charger like those used in motor homes and caravans (RV's and trailers). he also mentioned that since I have a towbar on my car that I already have one of these.
Now my question focuses around this does anybody know whethet the split charger here would be able to charge something like a small car or scooter battery and then I can just run the PC from that? as far as I can see it should, as you can charge a large car battery in your caravan and run fridges, lights and tv's etc. which is surely more of a power drain than a mini-itx PC!
once again thanks for all the info.
Originally Posted by Gillas
First of all, just because you have a tow bar doesn't mean you have a 'split charger"
Next, you are totally missing the point about powering your computer. WHY DO YOU NEED/WANT A SECOND BATTERY. You don't need it. you need a DC-DC computer power supply, or an AC-DC computer power supply with an inverter, connected to the alternator in your car. NOT AN EXTRA BATTERY.
Hey, I know why I want a second battery!
I want to keep my carputer running while I go shopping in and out of stores for a couple hours. At 35/40 watts, I don't know if the battery will last. Besides, it's hard on the battery. I need to replace my battery, and I've only had it two years, just from leaving my MP3 player and radar detector plugged in overnight. Right now, it barely cranks when it's cold.
Also, I want to be able to suspend to RAM overnight, which also pulls a little electricity.
So, I plan on putting an auxiliary deep-cycle battery in the trunk, running off a battery isolator circuit relayed through the ignition switch.
However, since I don't really know how to do it or what to buy, I'm watching this thread with a great deal of interest.
For what reason do you want top keep your computer running while you are shopping?Originally Posted by cjastram
I understand the suspend to RAM, though I personaly think it is a bad idea and not needed, but keeping it running while shopping, that makes no sense.
A second battery is very simple to add, though it adds wheight to a car, requires additional wiring and componenets.
First, go to an RV shop, or shop online at an RV supply site, and purchase a battery isolator. Then, mount your secondary battery. Then, connect the second battery to the first battery through the isolator. The isolator should have instructions. Then, connect your carputer DC-DC or inverter and AC-DC PS to the second battery.
Am I missing something, because I just don't see why this is a difficult concept. Connecting a carputer to a second battery is just like connecting it to a cars battery when there is only one, except it requires an isolator (which has been mentioned on this site many times, and in this thread)
I just don't want a potential flat battery just because the PC stalled on shutdown or something. if I had the PC on its own seperate battery all I would have to worry about would be the second battery going flat. and after I found out that the second (grey) socket on the towbar wiring was for split charging a second battery I thought why not use it?
Since I will not be fitting a touchscreen to the pc yet I will have limited control over the PC and for the first few months it will simply be set up to run MP3's.
perhaps this will help explain my point and question