I'm attempting to build a compact way to charge six laptops (of the same model) so that I may avoid using six individual power cables. I'm trying to make it cost-effective yet safe.
My initial design was to take a simple 24V 15A DC power supply off Amazon and branch the output connection to six individual boards that each drop the voltage to a specific value using an LM317T. However, all parts including an enclosure came out to be about $45. I need 5 of these power hubs. Additionally, the charger for this brand of laptop is rated at 19.5V 3A. Wouldn't that mean that all six laptops draw a combined load of 18A, or does the manufacturer design the charger with some sort of leeway?
I am unable to find any DC power supplies that exceed 15A and are under $30. How hard would it be to build something that is capable of providing, let's say, 20A? Could I take a circuit designed for 5A and substitute parts that are rated for higher amperages?
Below, I've provided an image that illustrates the device I'd like to build: