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.
Teensy creator Paul Stoffregen designed this board to momentarily disconnect a USB device:
This simple board plugs inline with a USB cable. It always passes the 5V power and normally passes the USB data signals. But when you press the button, the USB data signals are momentarily disconnected.
For the last few months I’ve been developing a USB Host Library for powerful but complex EHCI USB port in Teensy 3.6 [..] Reaching over to physically unplug the USB cable gets old quickly! Really, really old, both hands off my keyboard… right when trying to focus [..] I made this handy little board with a proper USB 2.0 high speed mux chip. The control signal is just 3.3V logic, so I might even wire it up to something to automate the process.
News from the USB DAC + Headphone Amp project by Yin Zhong (summivox):
In the interim update post I posted the plan for integration into 2 boards: A 2-layer power board, and a 4-layer main board. Actually I have had a good copy of the main board for quite a while: Story for the power board is not as good though. In the beginning I screwed up on […]
An update from the USB DAC + Headphone Amp project by Yin Zhong (summivox):
Months into the project and I was still amazed at the lack of availability of a class of ASICs: USB-I2S bridges. Well I just lied — if you are fine with USB 1.1 and USB Audio Class (UAC) 1.0, which severely limits your (bit depth × resolution × channel count)
So I kept looking for ASICs, and I found one that is close enough: XMOS XHRA-2HPA. It even comes with a reference design that does exactly what I want!
summivox has shared the board on OSH Park:
It’s been a while since I last wrote *ahem* lies *cough* on this project. I am currently a little bit torn whether I should keep writing it here or start posting to my new hackaday.io presence… Anyway here is a brief update: TL;DR I now have a working standalone unit — USB in, headphone out […]
via Making Myself a USB DAC + Headphone Amp — Interim Update — Frog in the Well
Cypress’s FX2LP (CY7C6801x) is one of the smallest footprint MCUs that offer a high-speed USB (480 Mbit/s) device peripheral with built-in PHY (many others lack the PHY!). It contains a 8051 core for bookkeeping and setting up data streams through its hardware multiplexed parallel FIFO interface to/from an external processor, be it MCU, DSP, or FPGA/CPLD.
This is a breadboard-friendly minimal system PCB for CY7C68013 in QFN56 package. It integrates 3.3 V power supply, core clock, reset circuit/button, and I2C EEPROM (the MCU does not have built-in flash). It breaks out all IO pins through 2 rows x 20 pins 0.1″ pitch headers with 0.7″ row spacing.
summivox has shared the board on OSH Park:
I need a DAC for my AKG K702. However, the more I looked at commercially available a.k.a. “audiophile” products, the more snake oil I smell. So even before I ordered my CEntrance DACPort Slim, I was already looking into how I can reinventing the wheel
I use OSHPark for prototyping PCBs. I decided to use their 4-layer FR-408 stackup simply for an un-broken ground layer. Turns out that the analog signals can easily fit on the top layer, so I allocated the power layer to the negative rail, and the bottom layer to positive rails.
The DAC + Filter module works! It produces reasonably clean line-level audio signal as expected.
Alan Mitchell designed this board to interface 1-wire sensors to a Raspberry Pi computer:
This board is part of Alan’s Raspberry Pi data collection system:
The Mini-Monitor software is data acquisition software that runs on a Raspberry Pi computer. It is designed to post the collected data to the BMON web-based sensor reading database and analysis software, but the software can be modified to post to other Internet databases. The Mini-Monitor software has the ability to collect data from a number of different sources
Kaktus Circuits created this board to analyze USB devices:
Easily tap into the USB signals coming and going while the device is still connected to the bus [..] monitors power consumption [..] handy for reverse engineering devices without having to take the device apart
The assembled board can be purchased on Tindie. The hardware design files have be shared on GitHub:
kaktus85/USBuddy
OSH Park 