more like a voltage multiplier,an couple of example of which can be seen over at Steve Bench's web page.
Take any 12 volt battery,connect it to a "backwards" 12VAC transformer and you will get 120 volts out (instead of the normal use where 120 VAC in=12 VAC out).Use diode voltage multiplier network on this and you are in the 300VDC range and the only question becomes how much current you need to go with that voltage "upper"
Originally Posted by rickcr42 Take any 12 volt battery,connect it to a "backwards" 12VAC transformer and you will get 120 volts out
Err, no. Transformers work with alternating current, not DC. So you'd need to convert the battery's DC voltage to an AC signal first, probably by adding an oscillator driven transistor switch to create a square wave. Voila, a "switching" DC-DC power supply.
but I DO have a transformer/diode voltage multiplier right here within three feet of my person that uses a nine volt battery to get 120 volts using a simple transformer/diode circuit.Call it a "zapper" for the unsuspecting.not enough current to do any harm but enough voltage to give someone a wakeup call