Jeremy S. Cook

January 3, 2025

Consider the humble CR2032 battery. Roughly the size of a quarter and capable of supplying around 225mAh at a nominal 3V, these little coin cells are used to power all manner of small electronic devices that require a small amount of power. One might assume they can easily discharge 10mA or so, to power something like an ATtiny85 microcontroller plus an LED constantly for hours–or much longer intermittently.

Jeremy S. Cook

December 12, 2024

Data logging and analysis is a fundamental tool in the field of engineering (and beyond). If you need a simple logging solution that can theoretically last for years on a single LiPo battery, the ESP32-S3-based Bee Data Logger from Smart Bee Designs has a lot to offer. I got to try one out for this article and so far it looks great.