USB-to-serial adapter board for Open Hardware Summit badge

This adapter board to connects a USB-to-serial cable to the 2018 Open Hardware Summit badge.

DpulizcW0AABn7E

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!

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A previous blog post describes how to build and flash new MicroPython firmware to the badge:

 

The KiCad design files are shared on GitHub:

oshwabadge2018/adapter-board

Screenshot from 2018-10-20 02-25-11.pngThe board has been shared on OSH Park:

OSH Park: adapter board for USB-to-serial cable

Screenshot from 2018-10-18 00-02-21

Order from OSH Park

Bill of Materials (BoM)

  • 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

Digi-Key shopping cart

Screenshot from 2018-10-20 02-28-43

Resources:

USB-to-serial adapter board for Open Hardware Summit badge

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