Every day I routing same parts in my projects
I decided to make square inch core with castellated holes in 2.54 pitch pin.

What is on ArmaBrain

  • Samd21e18 with UF2 MSD bootloader
  • MCP73831T battery charger
  • Micro Usb connector, in next modules USB-C
  • Charging LED
  • Bootloader LED
  • Speaker
  • Reset button
  • JTAG header
  • Backlight control transistor
  • Power regulator
  • All necessary capacitors and resistors