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This circuit uses bog standard parts, without requiring a magical "do-it-all" IC. You can make an ultra simple 1.5v to 9v regulated stepup converter by using a TL496 IC, a coil and a capacitor, but thats not so much fun if you want to experiment. Ive already built a TL496 based circuit so I started doing web searches for something that I could make that would allow more fiddling and a wider range of applications.