Is this a way to step down DC Voltage?
If i have a 12 volt supply, and would like a 9 volt supply, would there be any problems with connecting a 3 volt battery backwards to cancle out 3 of the volts leaving me with 9?
If that is possible, will the battery be run down. image to explain. http://img7.imageshack.us/img7/407/testcircuit.jpg?