The hardware design files are shared on GitHub:
Power/data splitter for PD Buddy Sink
As of version 1.1.0 of its firmware, PD Buddy Sink can do USB Power Delivery negotiations while in Setup mode, making requests for new voltages and currents in real time based on user input via a USB CDC-ACM virtual serial port. To make full use of this feature, users need to be able to connect power and data to the PD Buddy Sink simultaneously. This board makes that possible, even with a computer that lacks USB Power Delivery output.
From Sven Gregori on Hackaday.io:
the USB MIDI keyboard dedicated to play all the four chord songs, from Adele via Green Day and Red Hot Chilli Peppers to U2 and Weezer. Thanks to MIDI, you can be any instrument – and all of them at once. Yay!
Built around an AVR ATmega328 and Objective Development’s V-USB library, 4chord MIDI acts as a regular USB MIDI instrument. It supports playback in every key and five different playback modes:
- simple triad chord (root, third, fifth)
- triad chord + third + fifth + third as quarter notes
- triad chord + third + fifth + octave as quarter notes
- root note + third + fifth + third as quarter notes
- root note + third + fifth + octave as quarter notes
The playback tempo can be set between 60 and 240 bpm.
Here is the board in action:
The design files and source code are available on GitHub:
From Nick Sayer on Hackaday.io:
This allows you to securely transport a data set by writing it onto a pair of cards and separately transporting them to a destination for recombination.
The intent is that only the pairing of two cards becomes in any way special. A card pair could be inserted in any Orthrus device and the data would be made available. But with only one card, all you get is half of the data encrypted with a key which you only half-possess.
The firmware source code is available on GitHub:
The assembled board is available on Tindie:
From Clayton G. Hobbs on Hackaday.io:
USB Power Delivery for everyone
USB Power Delivery is a cool standard for getting lots of power—up to 100 W—from a USB Type-C port. Being an open standard for supplying enough power to charge phones, laptops, and just about anything else under the sun, USB PD is poised to greatly reduce the amount of e-waste produced worldwide from obsolete proprietary chargers. Unfortunately, like all USB standards, it’s quite complex, putting it out of reach of the average electronics hobbyist.
PD Buddy Sink solves this problem, letting any hacker or maker use USB PD in their projects. Think of it as a smart power jack. To use it, first configure a voltage and current via the USB configuration interface. Then whenever the Sink is plugged in to a USB PD power supply, it negotiates the power your project needs and provides it on the output connector.
The KiCad design files are available on his website:
From K.C. Lee on Hackaday.io:
A low cost hardware dongle for capturing and analyzing Full Speed (12Mbps) traffic using ARM microcontroller
The board has been shared project by FPGA-Computer on OSH Park:
chmod775 on Hackaday.io designed this simple 3D Printed USB Connector compatible with PCBs from OSH Park:
I’ve made this 3D USB Connector because I want to remove the chunky and complex standard metal USB Connector from my new upcoming project.
The design it’s made to be simple and with the height reference from the OSHP ark PCB’s.