I'm currently building an Arduino Energy logger.It's made with what i have on hand :
- Arduino Nano
- INA219 Current Sensor (actually with an 0,1 Ohm resistor, i need to change that if i whant mesaure micro or nano ampere)
- RTC module
- SD card breakout (bottom side)
- 128x32 Oled Display
- 18650 Lipo battery + lipo charger module + 5V boost converter
It will be useful for measering power and energy that i can harvest from a potato...