By building your own SODIS system, you’ll see just how easy and impactful this technology can be for communities that struggle with a lack of access to clean water. This project will help you understand how education and technology can empower people to make their lives better.

Using the steps below you are going to build a SODIS system that uses the micro:bit to signal when the water is clean to drink either at the end of 6 hours in the sun, or when the water temperature goes above 50*C for an hour or more.

When you’re finished the physical build, you’ll learn the basic coding concepts behind what you’re programming and then code your SODIS system to test it in the real world.

Building Instructions

Use the arrows to navigate through the step-by-step building instructions.

Assembly steps:

  1. Locate a clear plastic water bottle. Be sure to remove the label.
  2. Fill up the bottle with water.
  3. Attach the micro:bit and battery pack securely to the water bottle.
  4. After you’ve downloaded the code to your micro:bit in the next step, lay each of the water bottles horizontally in a location with direct light exposure.