Maybe I'm describing a unicorn device here but I have a bunch of devices that run off DC-in of various voltages, and take a barrel jack connector for power. They all have their own wall warts but I've ...
iWatt, Inc. today announced the iW1700 Zero Power AC/DC Digital PWM Controller. The controller is designed to enable low-cost, energy-efficient 120V/230VAC offline adapters and chargers (up to 5W) ...