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Re: Is there an easy way to multiply / step up DC voltage??
Maxim is one company that produces chips that can either step-up,
step-down, or invert voltages. They even have chips that use capacitor
charge pumps. The MAX232 chip (it's a ttl to rs232 line driver) has charge
pumps on board that can give you about +10V and -10V from a 5v supply,
albeit with a very limited output current.
Linear Technology even has a Spice program (LTSpice/SwitcherCADIII)
that allows the user to evaluate switching designs before even building them.
There's also an active Yahoo Group that is dedicated to users of the LTSpice