Is there any space for GPIO headers/wires?

4.5v will not be enough - the Raspberry Pi won't be able to use ethernet or USB. I very much doubt you'll manage much in the ways of GPIO either.

Any reason you'd not want to use Wifi? You've got a silly amount of overheads for doing anything simple, but usb wifi adapters can be dead cheap and very easy to set up. I do not have much room inside the joystick end, definitely not enough for another Pi, not to mention that the overhead for somet...

Well, I personally think that the XBee wireless TX & RX modules are the best for the pi when coming to RC. Here are my reasons: They can have up to 100M range There is a GPIO board for the Pi specifically designed for XBees (The Slice of Pi, NOT The Slice of Pi IO. Do not get them both mixed up...

I am aiming to hook a joystick up to a servo that the Pi will control. The joystick is the old style where it is just a 4-switch job. With the one I linked I'd be modifying the sender so that it worked off of the joystick. This'd make it (hopefully) a case of hooking up power to the receiver and hoo...

What sort of environment, distance and update rate? Something such as http://www.ebay.co.uk/itm/400422325267 could meet your needs. That looks about right, but how do I send data through it? Is it serial? I'm looking for something that would work for about 10m max, outdoors (no rain), and updates a...

I am looking to send input to my Raspberry PI over radio (or some other low-power, non-line-of-sight method). The communication only needs to be one way, and would need to be able to transmit 4 distinct bits. Has anyone got an idea on what modules I'd need to accomplish this? I did a little research...