Solving the Christmas Tree Problem: A Wireless, Rechargeable eInk Design

Overview

Every year, millions of Canadian families bring a Christmas tree into their homes, set it up near the fireplace, decorate it with electric lights, and then...forget to water it. Last year, I created a device that used transistors and LEDs to monitor the water level of a Christmas tree. This device had several limitations: LEDs were always on, rapidly draining the single-use 9V battery; only three measurement levels; and the long wires between the display and the water stand were a safety hazard. This year, I completely redesigned last year's project, creating a device which consists of two wireless units that communicate over Bluetooth. The custom-designed, 3D printed display ornament can hang anywhere on the tree, while the sensor precisely measures the water level and sends updates via Bluetooth. My new device makes Christmas tree fires preventable in an environmentally friendly, precise, and attractive way.

Awards (1)

• Selected for CWSF 2026

Competition history

• CWSF 2026 Curiosity & Ingenuity

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