I Built A Sumo Robot That Fits In My Back Pocket
Most mini sumo robots look like garbage. Cables sticking out like spaghetti, ugly green PCBs slapped together, no thought given to design, just stuffed full of motors to win on brute force. I wanted to build the opposite. Over a year later, this is Lil Szymi: a 25 mm tall mini sumo robot with a custom 4-layer PCB, dual LIDAR opponent tracking, and a hand-machined steel chassis. It competed at RobotChallenge China 2025. ⏱️ TIMESTAMPS 0:00 Intro 0:32 The Goal 1:35 The Drivetrain 4:03 The Chassis 6:51 The Custom PCB 9:16 The Firmware 11:03 Championship 11:52 Verdict 12:14 Outro 📲 OTHER SOCIALS Instagram: @szymigzzz TikTok: @szymigzzz #robotics #minisumo #engineering #diy #pcb #stm32 #altium #cad #electronics #makerspace #robotbuild #buildtech #engineeringstudent #robotcompetition #embedded #firmware #3dprinting #cnc #lidar #sumorobot
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