bigclivedotcom authorizes JLCPCB to share a small Chizhevsky ioniser PCB designed to fit into a Hammond 1591XXATBU case (100mm x 51mm x 25mm) or (4" x 2" x 1").
It uses 22 10nf-100nf 630V capacitors, 22 1N4007 diodes, 2 1-Megohm or 10-Megohm one-watt resistors, a 330K quarter watt resistor, and a neon indicator, to create a high enough voltage to ionize air at the needle or carbon fiber tips.
ONLY SUITABLE FOR 220V to 250V AC POWER. It will not work properly on 120V
PCB DIY project video link https://www.youtube.com/watch?v=ZLB2UUQ35J0
Free Gerber Viewer https://jlcpcb.com/RGE