Parametric USB power hub
by profezzorn, published
A simple USB power distribution block. Hook it up to a 5v power supply (like ATX) and plug in as many devices as you need for your project. I use mine to power a raspberry pi, a teensy and a ethernet/wifi bridge.
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where would you put the diode? I’m doing a strip of USBs and don’t want the devices charging each other...
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Get straight USB connectors made for circuit boards. The STL has room for three, but the scad file is parametric, so if you want to have 47 of them, go ahead. Insert the USB connectors into the holder, bend the side tab on each one out to keep it in place. Also make sure to squish the inside springs a little as inserting usb cables will be very tight otherwise. Solder the data pins (the middle ones) together on each usb connector, then connect pin 1 and pin 4 to the power as shown. (Make sure you get + and - right, I'll let you figure out which is which so you can't blame me if you get it wrong.) Once everything is hooked up, simply press the holder into the back part. It should be a snug fit which will not require any glue. Use double-stick tape or velcro to attach it wherever you need it.
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