The true complexity of a CRT clock schematic lies between the microcontroller and the tube’s deflection plates. Microcontrollers output milliamps at 5V, but CRT deflection plates require tens of volts and sufficient current to move the beam quickly across the phosphor screen. This is where (often based on operational amplifiers like the TL084 or discrete transistor pairs) come into play.
No specific math equations were used, so no $$math syntax$$. Crt Clock Schematic
Do not use a 555 timer into a MOSFET for this. Royer topology is self-resonant and much cleaner for clock applications. The true complexity of a CRT clock schematic
: Uses small, often 2-inch or 3-inch, electrostatic CRTs like the DG7-6 or DH3/91 . often 2-inch or 3-inch