CAUTION: HIGH VOLTAGE (100 - 200 V DC)
This is a simple boost converter circuit. It takes in a low voltage input of around 3 to 9 volts and gives an output of 100 to 200 volts. You cannot use it to power anything though, since the voltage is right across the capacitor, and it falls rapidly with loading. However it can shock a person.
I made this using material easily available in any electrical shop, and some special electronic components.
There are 2 circuits used in a boost converter.
Usually is boost power supplies a MOSFET is used as a switch, and also their is a feedback mechanism which stops the switching (or what i like to call, pumping) once the desired voltage has been attained. In this circuit however, I have not included that, since I just wanted a high voltage.
For more details, refer to this link.