> It is time to standardize a multi voltage DC connector so I can connect all my electronic devices directly to mains without the need of any converter. We act

> It is time to standardize a multi voltage DC connector so I can connect all my electronic devices directly to mains without the need of any converter. We actually have that connector already: it's the USB-C connector, together with the USB-PD protocol. And with its Programmable Power Supply mode, an arbitrary voltage can be requested. > It is time to pressure power distributors to provide huge powerful converters just like they do with transformers, This way we could have quality cheap DC inside our homes without any of these numerous redundant dubious quality converters we need today. You'd still need one per device, though. At the voltages and currents used by most electronic devices, the voltage drop between separate wall sockets would be enough to have one or more of them be outside the correct voltage range (to start with, you'd need a sense wire to each socket so that the power source knows how much to increase the source voltage to compensate for the power drop in the wiring; from which socket would the sense wire come if a single DC/DC converter is supplying more than one?). Not to mention that it would either waste a lot of power as heat (within your walls), or require thick (and more expensive) cables. And that's before considering that what some devices really want is constant current, not constant voltage (IIRC, LED lamps are one example of that). It makes much more sense to distribute a higher voltage, and convert it to a lower voltage next to the device itself. It's more efficient, allows for thinner cabling, and since you're already converting voltages, you can use AC which has its own advantages.