One 9V battery gives +18, +25, +33V

For you high-voltage minibooster fans out there, here’s the one-chip, one battery way to do it.

The MAX1044 is a charge pump converter - it uses a capacitor as a “bucket” to pump charge from one place to another. Normally, there is a capacitor connected from pin 2 of the 1044 to pin 4. This capacitor is charged between +9V and ground, and then switched in parallel with a capacitor from pin 5 to ground in a way that makes a negative voltage on the second cap.

Read more Source : http://www.geofex.com/circuits/+9_to_33.htm

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