In honor of the first official DEFCON China event, we present to you a badge with a purpose. Created with the specific goal of bringing the DEFCON China community together, the badge is a fun, open source, hackable, and reusable electronic device. Join badge designer Joe Grand as he guides you through the entire badge development process, including early concepts, prototyping, manufacturing, and all of the challenges he faced along the way. Joe Grand (@joegrand), also known as Kingpin, is a computer engineer, hardware hacker, DEFCON badge designer, teacher, advisor, runner, daddy, honorary doctor, TV host, member of legendary hacker group L0pht Heavy Industries, and the proprietor of Grand Idea Studio (grandideastudio.com). He has been creating, exploring, and manipulating electronic devices since the 1980s. @joegrand (Twitter) and http://www.grandideastudio.com/