BabyGeezer:
Yep, that's what i've been doing - 5V, 9V but just the one 12V.
and they are all under 1000mA! (i have 500mA, 600mA and 900mA !!)I should re purpose an old USB cable - I have a phone charger (1000mA) that has a USB socket.
OK, good!
Well, one of the delights of electronics as a hobby is finding new uses for old things, or getting things to work in ways the manufacturer never intended.