Building a compact USB C to USB A adapter #USB #Design #PCB

Via the Facelesstech blog comes a compact USB C to USB A adaptor. We all want to be able to adapt one to the other, and this tiny design does that.

tl;dr – This might not seem useful to anyone else but me. At the side of my bed I have a USB C cable for charging my phone but on occasion I need to charge my “fitness tracker” or 3DS. I couldn’t find a adapter that went from female USB C to female USB A port so I decided to make my own. Join me below to see what I learn along the way.

In other projects I had been using Micro USB female ports to add a point to charge but I wanted to move with the times and add a USB C female port. The only ones I could find had the full set of pins for data and the like, Not very hand solderable. Luckily I found some 6 pin USB C female ports that did just power, Perfect for my needs. While looking at the data sheet for these ports I noticed they had CC1 and CC2 pins, What the hell are these when they are at home. After a bit of reading (mostly this page) I found out they are used by the electronically marked USB C cables, AKA the resistors the raspberry pi foundation left off the raspberry pi 4. With my project being a power receiving device It needed a 5.1k resistor pulled to GND on each of these pins.

See the whole project article here.

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