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