2 layers127 × 117.5 mm

Diy ert
CainPatel/diy-ert
A $150 four-electrode earth resistivity meter (Wenner array): Arduino, AD620, ADS1115. Documented failure-first as an engineering log.
44 parts1MIT
KiCad boards from 2 GitHub repositories tagged “resistivity”, the most starred first; open any of them in PCBKit.

CainPatel/diy-ert
A $150 four-electrode earth resistivity meter (Wenner array): Arduino, AD620, ADS1115. Documented failure-first as an engineering log.






