how to make a mini high voltage transformer?

To make a mini high voltage transformer, you’ll need a ferrite core, insulated copper wire, and a power source. Start by winding the primary coil (fewer turns) around the core, then wind the secondary coil (more turns) over it. Ensure proper insulation between the coils to prevent short circuits. Connect the primary coil to a low voltage AC source. The transformer will step up the voltage in the secondary coil, producing high voltage output. Always prioritize safety when working with high voltages.