I have a problem with an old PC keyboard i really love; it's very picky on the input voltage (+5VDC), and most modern motherboards, having to deal with main power and standby power tend to use diodes / resistors on the +Vout of the PS/2 connector, resulting in lower voltages (my motherboard measures at 4.8, and yes, that's not good enough). Does anyone have any idea on how to get 1 extra volt from the +5VDC one? Keep in mind these are low current power outputs (fused, i think at 500mA but i wouldn't feel safe going over 300mA, knowing a keyboard needs 100-170mA by itself). Batteries and extra wiring are out of the question; the idea is to be able to modify any troublesome keyboard so it works everywhere, hassle free. I thought of DC inverters, but where i live (Argentina) the IC kind are hard to come by; so if anyone knows a discrete design of this sort (nothing fancy), i'd be most thankful.