Adapter board to connect USB-to-serial cable to J1 header on Open Hardware Summit badge

Blog post:

Adapter board for 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!

GitHub repo:

adapter-board [commit: c355b30]

Bill of Materials (BoM)

• Digi-Key shopping cart

• 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
  • 1x6 Pin Header 0.1" pitch
  • Digi-Key: A34253-06-ND

• Header to connect J1 socket on badge

  • Harwin M20-9720345
  • 2x3 Pin Header 0.1" pitch
  • Digi-Key: 952-1921-ND

• J1 header socket on the badge

  • Harwin 952-1781-ND
  • 2x3 Header Socket 0.1" pitch
  • Digi-Key: M20-7830346