Simple Room Ionizer Circuit Diagram is a voltage multiplier circuit acting as an Ionizer. Its calculated to feed 220V from mains and the output is about 6KV. Caution should take with the circuit as can be dangerous due to mains. You can place a needle at the output 3cm long. Even you disconnect from mains, capacitors can be dangerous so make sure to discharge them by shorting their pins before you touch the circuit with hands.
Simple Room Ionizer Circuit Diagram