I was hoping to connect the AV-OUT port of the Pi to the AV-IN port of a low-cost sat-nav (eg http://www.ebay.co.uk/itm/2609.....5998wt_952
as a monitor in the car.
Any idea if it would work?
I thought of that, too. My Sat-Nav has a composite-in for hooking up a backup camera. However, that idea falls flat for two reasons: 1) I've already got a backup camera hooked to it, and 2) The resolution would be terrible.
I hadn't thought of using VNC or ssh, but now... it's starting to make sense.
When I started this thread, the notion was to use a dedicated keyboard (and mouse, if needed) and all I needed was an external display. VNC would work for this, but then you have the problem of establishing a LAN connection between the iPad and the RPi.
Because the iPad doesn't have a wired LAN socket, there are only two ways (that I can think of) to get them talking to each other: 1) Plug a wi-fi dongle into the RPi and then, somehow, turn it into an access point, or 2) Rig up a battery-powered wireless router (like a little FON router or even a bigger, 4-port one) and then plug the RPi into one of its wired ports). I'd be interested to know how easy it would be, using one of the standard RPi distros, to turn it into an access point.
But the mention of SSH and VNC got me thinking along other lines. I could just use my laptop. I already use it to SSH into lots of other hosts, it has a wired ethernet port, it brings its own keyboard and pointer, and all I have to do is either run a dhcpd on the RPi to give my laptop an IP, or I can just hard the laptop's IP.
I'm still interested in hearing about what everyone else is going to do, but I think I've decided on my solution: laptop with wired ethernet, and using SSH (and, optionally, an X server) to control the RPi.