Hello… I have been working on a Car PC project for the past 4 years. Recently I finished the Dual Zone system, which allows the driver to do his own thing (stuff for driving) then rear (access to multimedia). This system does everything imaginable. I then had a second system which used VM to create 6 personal computers for each seat. Problem is the setup is massive and uses tons of power, and all I really need for those systems is internet, music, and video.
I had inquired on the RasPi last year, but it was not available. Thats when I installed the VM system. Now that RasPi is being sold, I can now change the setup. I do have questions and I am hoping that the RasPi community can help.
1) I know that these units use SD cards, can the SD card be read only, that way the user can not mess up anything? Also I ask because I want the main system to control the RasPi units, so it would simply shut them off when it turns off. I am not sure but on a regular system, if it is read and write, the HDD can be corrupted. Where as if it is read, it cant.
2) Would it be ok to run these units off a cigarette lighter adapter? I know the specs say that I need 5V 1amp to power the RasPi, so I assume a car charger with those specs will work. Can someone confirm?
3) My setup uses KVMP switches, which have a built in USB hub and VGA port. With that being said, all the screens use VGA ports. I see that the RasPi uses HDMI. What are my options to getting VGA capabilities on the RasPi? I see so many options on Amazon, some being simple cables and others being full adapters that need 5V power. Which do I need to use?
Any help would be appreciated.