Originally posted by GReddy
do you have to use resistors? what happens if you dont use them?
By the time your done getting your power supply, buying the necessary transistors and spending time soldering stuff together and testing it, your better off just buying a 12-13 volt power supply for $30.
Unless you have all the equipment already and know what your doing, the time spent doing this almost negates what you save.
I got my Pyramid for $35 shipped.
Unless of course the reason for doing it is to build it yourself. In that case, have at it.