The simplest way to make a quality HV (High Voltage) source from a PC power supply
https://maker.pro/analog/projects/the-simplest-way-to-make-a-quality-hv-high-voltage-source-from-a-pc-power-supply
Usually, for HV experiments is used so-called ZVS driver, but damage to the mosfets often occurs due to its low efficiency. This is simple, compact, easy to make, and stable during long-term operatin HV Source.
Induction heater, HV source, and Wireless Energy transfer with chip mini ZVS Driver from Aliexpress
https://maker.pro/analog/projects/induction-heater-hv-source-and-wireless-energy-transfer-with-chip-mini-zvs-driver-from-aliexpress
How to make some practical devices with a cheap compact ZVS driver module sold on AliExpress for less than $5.
Simplest way to make Induction Heater, Power Supply, and HV Source from CFL Bulb Ballast
https://maker.pro/analog/projects/simplest-way-to-make-induction-heater-power-supply-and-hv-source-from-cfl-bulb-ballast
An interesting project that describes how to make several useful devices using a CFL bulb ballast, with minimal modification.