Here is my need.
I have -12v and need to make it -22v at about 300ma dose any one have
a good circuit to do this.

On Tue, 30 Dec 2003 21:08:46 GMT, Gunner
wrote:

Here is my need.
I have -12v and need to make it -22v at about 300ma dose any one have
a good circuit to do this.

What you really want is called a DC to DC converter.

Make sure the device is properly regulated before you hook it into
anything electronic; These converters are really controlled voltage
multipliers that when malfunctioning can produce voltages in access of
2000+ Volts.

schematic for a higher voltage one that you may be able to modify

http://www.qsl.net/xq2fod/Electron/dcdc/dcdc.html

See if that gets you anywhere, you might be able to Cannibalize a
transformer out of a old sony walkman or something.

Here this place sells them

http://sales.goldmine-elec.com/prodinfo.asp?prodid=3338