3D Printed Case for Living Green Wall Project

This post is part of the series on DIY Living Green Wall:

  1. Living Green Wall Prototype
  2. Arduino Watering System Prototype
  3. 3D Printed Case for Living Green Wall project

To follow you need basic knowledge of Arduino circuits (do some tutorials first) and beginner skills in programming.

Business requirements

We need the project’s casing to:

  • enclose all the circuit parts
  • be extendable with different pumps, additional sensors, and functionalities
  • have an accessible manual control button
  • have an OLED display attached
  • have an easy access to Arduino UNO ports and power plug
  • be easy to disassemble, hence limit the use of glue and solder

We will use  Modular 3D Printed Case for DIY Project and extend the base design to fulfill our requirements.

Prerequisites

Get familiar with the Modular 3D Printed Case for DIY Project tutorial.

Get familiar with OpenSCAD Cheatsheet

Download and install OpenSCAD

The Arduino UNO Case

The body

First, add Modular 3D Printed Case libraries:

Now, let’s build the basic case we can work on. Modular 3D Printed Case has basic dimensions ready to use with Arduino UNO, so there is no need to adjust anything.

We need a way to attach Arduino PCB to the case so it sits firm and sturdy. I decided to make screw hole insets (plugs).

Finally, cut USB and power plug holes on the corresponding wall.

The cover

One of our requirements says the case should have an OLED display attached to it. Case’s cover seems to be the good place to mount it. First, let’s create a basic cover. Just like with the body we don’t need to change any dimensions as it’s ready for Arduino UNO.

Next, cut the opening for the LCD Screen.

The OLED display I bought needs some pins and wires space on a screen side so it can fit closely to the cover.

 

Finally, cut screw holes to mount the display.

 

The final result

Relay Circuit Case

For those who followed the tutorial obvious is we still need a cover for water pump circuit, relay, reset button and water pump motor. Let’s get into that.

One of the requirements says that casing should be easy to disassemble, hence limit the use of glue and solder.
To fulfill this requirement I decided to use zip ties to attach motor plug and build a pouch to mount the button’s base. Button’s base will simply slide into cover’s body exposing button on its wall.

The body

First, let’s define dimensions of plug and button.

Next import the base box.

Add holding walls of the motor plug and cut the hole for a zip tie. These side walls should be lower than the body’s wall so zip tie will fit under the cover.

Next, widen the same wall in the place where we will build the pouch for button’s base.

 

The cover

Simply call base module.

Final result

Assembled prototype of Arduino and Relay Circuit

Please note that wires are connected randomly. It’s for demonstration purposes only.