Hogwarts, the two day Harry Potter theme based technical workshop covered the basics of two of the techniques ideal for rendering graphics in such films. The Image Processing track covered processes from access of webcam to contour identification. The projects taught were based on the Harry Potter theme like Polyjuice, which was about creating a fake background and The Elder Wand about Continuous detection of an object. The Robot Operating System track covered creation of node, ROS topic list, ROS topic echo, RQT graph, assigning publishers and subscribers and simulating bot moves by publishing linear and angular velocities. The workshop was organised by Rotaract Club of PES University, RR Campus on Nov 3 and 5, 2020.