EnergyMeter

A DIY attempt to make an electronic energy meter using Arduino.

Note This project is made by a beginner as a learning experience. There might be mistakes in the design, wiring, or code. Please replicate at your own risk, and feel free to improve or suggest changes!

Features

• Measures voltage, current, power, and total energy consumed.
• Displays real-time values on an OLED screen.
• Stores total energy across restarts.
• On boot, if D7 (or chosen pin) is connected to GND, the energy counter is reset.

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Build and Run

arduino-cli compile -b arduino:avr:nano . \
&& arduino-cli upload -v -p /dev/ttyUSB* -b arduino:avr:nano:cpu=atmega328old . \
&& arduino-cli monitor -p /dev/ttyUSB* --config 115200

Make sure the correct port /dev/ttyUSB* is used and accessible.

Schematic

Ratings

• Input Voltage: 0 V – 30 V
• Current Range: 0 A – ~8 A
• Shunt Resistor: 0.05 Ω, ≥2 W

Photos

Front View	Back View (ugly)