this is the relay unit I have http://www.ebay.com.au/itm/190866383...84.m1439.l2649 I think it needs 4 x 5volt
I've written some simple software to interface to a BlueTooth joystick app on my Samsung tablet.
The program reads the joystick or button value
I have been using Kubuntu 14.04 64-bit for the last couple of months and I think that if you are looking for a replacement OS of Windows 7 this might
I thought it would be nice to setup a home control system using cheap WiFi routers such as the WR703N (~$20 on aliexpress or ~$24 on eBay).