After starting out watching it for 15 minutes, decided to skip to the end bit. Is good though, makes me almost want to try it. Would stop the dogs opening doors Have to also say RS232 vs USB. USB has too many licensing restrictions to bother with for hobbists without using a FTDI chip which is not cheap and then most output in TTL RS232 anyway! Not to mention windows native support for RS232 makes programs easier as you dont need to interface with DLL files.

Just shows you how stupid Barclays contactless payment cards are. I mean all a theif needs is a reader and he can copy everyones cards as he walks passed them.