A deflection coil is a coil of wire used to direct the electron beam in a cathode ray tube (CRT). Based on the electric current flowing through the coil, the electron beam can be directed to different parts of the screen, thereby creating an image. There are two types of deflection coils: 1. Horizontal deflection (HDR): directs the electron beam horizontally. 2. Vertical deflection (VDC): directs the electron beam vertically. By combining horizontal and vertical deflection, the electron beam can