External Battery Monitor from Your Arduino

Learn how to monitor external battery voltage using an Arduino in this 30-minute tutorial. Discover a simple technique to detect failing batteries and prevent data loss in your projects. Explore the setup process, including circuit configuration and Arduino code implementation. Understand the importance of early warning systems for battery discharge and how to avoid permanent damage to LiPO batteries. Gain insights into critical code elements essential for proper functionality without risking damage to the Arduino's AREF pin. Follow along with circuit diagrams and sketches to create your own external battery monitor, ensuring your data-gathering projects remain powered and operational.

Intro
Question
Setup
Block circuit
Arduino code
The problem
The solution
The board
Where I got it
Conclusion