The KAPtery closed on December 31, 2024. Products can no longer be ordered from these pages. Some products are available for purchase from Ennapurna in France. For questions, replacement parts, special requests, or leftover inventory, use the Contact page above.
Who will win in a world of...LASER DEPTHS?
A Mini Pearl Logger has been collecting data on the water depth in my springhouse. The data revealed one of the many secrets of the hillside's hydrology.
Mounting and deploying a Mini Pearl Logger
A tidy mounting plate and an easy way to protect a Mini Pearl Logger in the field.
Assembling a Mini Pearl Pro Logger
Instructions for assembling a Mini Pearl Pro data logger.
Prototyping the Mini Pearl Logger
The first build of the data logger that would become the Mini Pearl Logger.
Mini Pearl Jam
Early trials of the Mini Pearl Logger.
Installing the water-level monitor
The Mini-Pearl Logger is installed in the springhouse to record the water level.
Will trigonometry help an Arduino measure water depth?
A more elegant approach to measuring water depth in my springhouse is to use trigonometry to derive a dimension of a triangle from the angle measured by the accelerometer.