ATM90E26_Featherwing_KiCAD

ATM90E26 Featherwing with ongoing development in KiCAD

• Previous Eagle version available here: https://github.com/whatnick/ATM90E26_Featherwing
• Arduino Library is available here: https://github.com/whatnick/ATM90E26_Arduino
• Micropython Library is available here: https://github.com/whatnick/ATM90E26_Micropython

Connection to Host CPU

The boards can be connected in 2 ways with different corresponding jumper settings underneath the board:

• UART mode (default mode)

• SPI mode (requires resoldering of jumpers)

  • With CS on pin 9
  • With CS on pin 10

Metering modes

Using the MMD jumper various metering modes can be selected as specified by the datasheets.

Connection to Voltage/Current samplers

The ATM90E26 can acquire 1 voltage and 2 current waveforms to perform energy measurement.

• Voltage sampling using step-down transformer (9V-12V) and voltage divider
• Current sampling using CT with multiplier resistor

Licence Details

• Hardware License: TAPR 1.0
• Software License: MIT
• Documentation License: CC BY 4.0 International