A team from Colorado-based SparkFun Electronics, an online retail store that sells pieces for electronics projects, recently used an inexpensive, homemade robot, which features some 3D printed components, to crack open a SentrySafe safe in front of hundreds of excited onlookers at a convention for hackers in Las Vegas. It took the SparkFun team's robot about half an hour to reduce the number of possible safe combinations from one million to one thousand, eventually determine that the combination was 51.36.93, and open the safe live on stage. Founder Nathan Siedle and his colleagues spent about four months and $200 to build the automated, safe-cracking robot, using off-the-shelf and 3D printed components. Read more at 3DPrint.com: http://3dprint.com/182581/robot-cracks-safe-at-def-con/