I'm trying to build a powered USB hub without buying additional parts. So finding old electronics lying around the house kinda deal.
Anyways I have a 4 USB hub that I took apart to find the PCB was designed to accept an external power source (it has a jack silk screen and a capacitor silkscreen). Good news!
I only was able to find this AC/DC converter however. It outputs 12V and 1700mA. USB devices are built for a Vcc of 5V, usually from 4.8V to 5.3V or so, and amperage varies though I've mostly seen 1A as the top value.
What are my options? I'd love to build a circuit but I'm not very good with Electrical Engineering, and I only have Transistors (PNP and NPN), Capacitors, Resistors and a 595 timing chip to work with.
I should add I have a car inverter that I don't use, one with a USB port on it. Is it viable to take that apart? I'm guessing it doesn't invert from 12v DC to 120V AC then back to 12V DC then drop it down to 5V, it probably just drops the DC to 5V.
Any advice welcome, I'm still very new to circuitry.