Hi – I posted to Bit-Techs preview of the Raspberry Pi my intention with the second unit I purchase (probably in 4 to 6 months time) to develop the RPi as an improved ultra low power guider.
Whilst yes, we can all hope for a 'perfectly' aligned scope, those with Alt Az mounts (mounts that go 'left/right' and 'up/down' on a level plane) can be controlled with a guide scope (read RPi with webcam) for medium term exposures. You still have the problem of sky/field rotation, but that can be sorted out later and is only a problem with long exposures. Obviously with a well aligned EQ mount, it is a lot easier to guide for longer periods.
Also I wonder for those who have domes, whether the RPi and a gert board or similar would allow for a superior dome controller. You could monitor everything, control a huge amount, send instructions to the RPi remotely to control the imaging. Possibly even tie in the security and weather facilities depending on how much your observatory has.
Pie in the sky for the moment, but certainly I look forward to trying something with a second RPi that is sky related.
Sounds like someone with a similar interest I run an NEQ6 Synscan and have just ordered an ST80 which should arrive tomorrow to use as a guide scope. Although I was going to buy a standalone guide scope controller (to begin with) I would love to build a device with all the astro functions built in. My plan was to use a peli case with everything built into it. Guiding, camera control, focus control, sky quality meter, control, gps etc but then maybe other stuff as we go along My original plan was to take a laptop apart and fit it inside WITH the arduino stuff etc BUT this might be a more interesting idea even if I need to use two of them