12V from 9V battery or other easy alternative?
Hello, I need a 12V 0.2A(min) power supply for a project... I don't want to use any kind of strange or expensive battery because it's a gift for someone. I was planning on using a 9 volt battery, is there any easy way to build maybe a step-up transformer for it (needs to be very compact)? Or could I use AA batteries? I don't want to use 8 AAs though, I do know that's be 12 volts... Thanks, any help is appreciated.