Introduction: How to Make a Self Watering Planter
In this instructable, I am going to show you how you can build a self watering planter. So lets get started!
For this you need,
A 3d printer and filament to make the planter.
Tools required for soldering
Step 1: Make the Planter and Reservoir
First, you need to make the planter and the water reservoir. To make mine, I used tinkercad. Its quite easy to make 3d models as well as simulate electronics in tinkercad.
You need to make your own planter to suit your plants.
Step 2: Make the Electronics
To make it easy to understand, I made the schematic using tinkercad circuits.
The circuit is very simple. When the soil in the planter is wet, its resistance is enough to close the transistor and power the relay. The water pump is connected to the Normally Closed contact of the relay. This is because when the soil is dry, the relay turns off. When the relay turns off, the water pump starts spraying water on plants till the soil is wet. I also added a led to show the state. Red means soil is dry and green means soil is adequately wet.
You have to make two electrodes of length 3 cm and place it 10 apart in the soil. The electrodes have to be placed in place of the potentiometer.
Important! You need to use a five volt relay or it won't work.
Step 3: Its Done + Updates
The build is complete.
4/4/2020Update: A person in the comments pointed out that this would work for less than a day on a normal 9v battery, so you can make some upgrades like:
- Using a 5v powerbank and a solar panel to power this.
- Adding some blue and red lights with a timer.
6/4/2020 Update: I tried using a 6A/H 12V Lithium ion battery with a 12 volt relay and now, it can last several weeks on a single charge
Participated in the
Indoor Plants Challenge