This adapter board to connects a USB-to-serial cable to the 2018 Open Hardware Summit badge.
The badge features an ESP32 microcontroller running MicroPython firmware. The firmware provides a Python interpreter prompt (REPL) on the serial port which allows interactive programming of the badge!
A previous blog post describes how to build and flash new MicroPython firmware to the badge:
The KiCad design files are shared on GitHub:
The board has been shared on OSH Park:
- Switch for programming mode
- E-Switch EG1218
- Slide Switch SPDT
- Digi-Key: EG1903-ND
- Pushbutton for reset
- Omron B3F-1000
- Tactile Switch SPST-NO
- Digi-Key: SW400-ND
- Header for FTDI usb-to-serial cable
- TE AMP 9-146282-0-06
- 1×6 Pin Header 0.1″ pitch
- Digi-Key: A34253-06-ND
- Header to connect J1 socket on badge
- Harwin M20-9720345
- 2×3 Pin Header 0.1″ pitch
- Digi-Key: 952-1921-ND
- J1 header socket on the badge
- Harwin 952-1781-ND
- 2×3 Header Socket 0.1″ pitch
- Digi-Key: M20-7830346
Want to use the KX122-1037 Accelerometer (datasheet) on the 2018 Open Hardware Summit badge?
Make sure that R12 and R13 are populated.
R12 and R13 are 2.2K Ohm resistors for the I2C bus. This is needed for the accelerometer to work. We mistakenly had DNP (do not place) on the BoM (Bill of Materials) for R12 and R13.
Awesome people at Artisan’s Asylum makerspace helped to solder these resistors on the badges right before Open Hardware Summit! 💜✨
It is possible that some badges were not reworked. Please email [email protected] if they are missing from your badge.
This photo shows what is will look like when R12 and R13 are missing:
Download the Python file named accelerometer.py from the ohs18apps repository on GitHub:
Start the FTP server and connect to the SSID listed on the badge:
Open your FTP client application and connect to 192.168.4.1:
After the transfer completes, power cycle the badge by removing the batteries and reinserting.
Press the left application button (with the paintbrush and pencil icons) to enter the menu. accelerometer.py should then be listed under Available Apps menu. Press the down cursor until accelerometer.py is selected and then press the application button again.
The KX122-1037 Accelerometer datasheet describes the 3 different axis:
Here are examples of the X, Y and Z axis of the accelerometer for reference:
X axis positive max
X axis negative max
Y axis positive max
Y axis negative max
Z axis positive max
Z axis negative max
The Open Hardware Summit is coming on Thursday, September 27th at MIT. OSH Park and Screaming Circuits are producing an electronic conference badge this year for the Summit. The badge features an e-paper display and an ESP32 microcontroller.
All 300 badges assembled by Screaming Circuits have arrived!
Thanks to Duane Benson and the rest of the team at Screaming Circuits for all the support on this project.
Follow the Open Hardware Summit 2018 badge project on Hackaday.io!
The application deadline is Monday, April 30th, for the Ada Lovelace Fellowship to attend the 2018 Open Hardware Summit:
The Ada Lovelace Fellowship was founded in 2013 prior to the annual Open Hardware Summit at MIT by Summit Chair Addie Wagenknecht and OSHWA Director Alicia Gibb as a way to encourage women, LGBTA+ and/or other minorities in open technology and culture to actively participate and foster a more diverse community within open source.
For the sixth year, we are excited to offer up to ten Open Hardware Fellowships to members of the community which includes a $500 travel stipend and entrance to the Open Hardware Summit.
By offering the annual travel and summit conference assistance to community members, the Open Source Hardware Association hopes we as a community can encourage more women, LGBTA+ and/or people of color to participate in open source. We have many strong leaders and speakers in our field and we personally want to continue the trend upward.
From Christopher Wang on the Hackaday blog:
The Open Source Hardware Association is now accepting applications for the Ada Lovelace fellowship which provides free admission to the Open Hardware Summit and a $500 travel stipend. One of OSHWA’s goals is to foster a more diverse community within open source. As part of this, Ada Lovelace Fellowships are open to women, LGBTA+, and people of color. There are a total of 10 fellowships available and applications are due by April 30th. The Open Hardware Summit will be held on September 27th at MIT.
The fellowship program, founded by Addie Wagenknecht and Alicia Gibb in 2013, builds on the ideal that Open Hardware is one way to reduce the barriers associated in access to technology. Removing some of the financial barriers associated with attending the Summit will help to ensure more people of diverse backgrounds are involved in shaping the Open Hardware world. In addition to the talks shared at the gathering, over the last several year OSWHA has been evolving the Open Hardware definition and an Open Hardware certification.
Mike Szczys writes about 2017 Open Hardware Summit last week in Denver:
This yearly gathering brings together the people and businesses that hold Open Hardware as an ideal to encourage, grow, and live by. There was a night-before party, the summit itself which is a day full of talks, and this year a tour of a couple very familiar open hardware companies in the area.
I thought this year’s conference was quite delightful and am happy to share with you some of the highlights.
The OSH Park table was not only showing off a PCB panel as their signage, but had our favorite SMD solder challenge boards on hand.
Pamela Liou gave the 2017 Open Hardware Summit keynote last Thursday in Denver (skip to the 6 minute mark):
Pamela spoke about her desktop loom project: