...use DC but AC to power itself? Well most devices at home seem to use DC to power itself. I see an AC plug connected to the TV but inside I see circuit boards that are powered by DC. My computer is supplied by AC but the motherboard is powered by DC. My printer uses AC but the circuits use DC to power itself. Is there a device that doesn't use DC but AC to power itself? I don't know any device that uses AC power to power itself.