Building a mini sumo robot on a budget HD

This video shows my process for designing a mini sumo robot from scratch. Starting from a simple sketch on paper, I move on to component selection, schematic diagram, PCB layout, PCB Assembly, mechanical assembly, and finally to programming and testing. -- Contents of this video -- 00:00 - Intro 00:25 - Sketching a sumo bot 03:28 - Selecting components 05:31 - Schematic in Eagle 05:58 - Micro:bit connector 06:55 - Battery connector 07:05 - Power switch 07:30 - LM1117 regulator 08:52 - L293 motor driver 09:00 - Motor connections 09:13 - TXB0106 voltage level translator 12:07 - QRE1113 line sensors 13:15 - VL53L0X Time of flight sensors 14:35 - TCA9539 IO Expander 16:28 - ERC check 17:07 - PCB layout 18:19 - DRC check 18:28 - CAM 19:01 - PCB assembly 21:40 - Mechanical assembly 24:04 - State machine 25:28 - C++ iimplementation 28:47 - Robots in action