HIGH VOLTAGE
GENERATORS
Electrophotography is made with High Voltage machines.
I've selected two types of them that give excellent results and are very easy to build
(click on HVFB / HVCD to see electronic plans):
HVFB - HV Flyback Generator
( uses a TV flyback
being pulsed by a duty cycle-adjustable frequency oscillator )
HVCD - HV Capacitive Discharge Generator
( uses a step up transformer
to charge a capacitor bank and discharges it rapidly into the
primary of a car ignition coil, thus generating HV although at
low frequencies )
If you want to know more about high voltage devices,
you may take a look at my pages dealing with these subjects:
(click on the links for full info)
HVFB - HV Flyback Generator 
HVCD - HV Capacitive Discharge Generator