Tim,

 How about using a charge pump?


                Regards,

                 Jim



> I'm working on a project where the user would like to use a standard 
> 0-18 VDC automotive type gauge as the display and they will replace 
> the meter face with custom lettering. The meter is to be driven to the 
> desired voltage (position) by a PIC and a section of a motor driver 
> that will use pwm to vary the voltage to the meter. The reason for the 
> standard gauge is that the user wants to have this display gauge match 
> all the others in the system.
> 
> I need to be able to drive the gauge nearly full scale so I'm looking 
> for something that will take 12-15 Volts and give me 18 Volts. There 
> is virtually no current required, just enough to drive the coil in the 
> meter movement.
> 
> The design is a "one of a kind" so I don't need to pinch pennies as 
> much as I'd like to just purchase a little module but I was trying to 
> avoid the common DC-DC converters I've run across due to physical size 
> and being overkill for my current requirements.
> 
> Any pointers to some small off the shelf modules, switcher designs 
> that don't need custom magnetics, etc. would be appreciated.
> 
> Tim
> 
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