<imgsrc="https://github.com/zyphlar/open-access-control-minimal-http/blob/master/hardware/assembled-board.jpg"width="350"alt="Photo of interlock circuit board"/><imgsrc="https://github.com/zyphlar/open-access-control-minimal-http/blob/master/hardware/assembled-prototype.jpg"width="350"alt="Photo of interlock prototype"/>
This is a stripped-down version of the 23b hackerspace's Open Access Control system, intended for embedded use with an RFID reader and Ethernet shield for authenticating Wiegand RFID cards with a webservice. Please see http://code.google.com/p/open-access-control/ for the main/full version.