Problem Statement

My roommate has several potted plants in our house and she doesn't know how much water they need. She estimates that she should water them every week – but she has no feedback as to if she’s over-watering or under-watering. She understands that some plants need water more often than others but she waters them the same because she isn’t sure which plants need more or less water. She would like some easy indicator to know if it’s time to water her plant or not. 

Goal

The goal here is to know if a plant is too dry and if it should be watered or not.

Process

Components

2 – Screws

2 – Washers

8 – Jumper wires

1 – Red LED

2 – 220Ω resistors