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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.

Step 1: Theory

There are 2 circuits used in a boost converter.

  1. The boost circuit- It has an inducter, a switch, a diode and a capacitor. A quick change in current through the inducter due to the switch results in a huge voltage across it. This huge voltage creates a huge current which charges up the capacitor. The diode doesn't let the capacitor discharge, and the voltage keeps building up.
  2. The switch- I have used a 555 timer with BJT power transistor 2N6292. The 555 generates a square wave which rapidly turns the transistor ON and OFF.

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.

<p>This reminds me of the old multivibrator switching circuits used to charge the photoflash packs back in the '60's, only your idea works far more efficiently, nice engineering too!</p>
Thank you very much! I just tinkered a bit with the existing designs.
<p>Tinkering: the very foundation of increasing one's knowledge, it doesn't matter if the outcome is positive or negative, they both yeild up answers.</p><p>Keep tinkering my friend! ☺</p>
Thank you for the encouragement! ?

About This Instructable

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Bio: I am an electronics and communication engineering student currently in my second year. I have an interest towards micro-controllers, electronic circuits and hardware hacking.
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