For Science Hack Day 2019 in San Francisco, we built a water filtration system to turn dirty water into a drinkable, clean, sanitary fluid, using local supplies and an optional electronic turbidity measurement system.

We won the prize for "Best Demonstration".

https://sf.sciencehackday.org/hacks-2019/

• Chloe Bonneau
• Gilles de Bordeaux
• Virginie de Bordeaux

• Reclaimed plastic bottle, paper or cloth, sand, gravel, charcoal.
• Arduino (I had an ESP8266 and used it, but you should find the most basic and cheap Arduino available).
• 1 x red LED
• 1 x green LED.
• 5 volts power bank (a solar cell and a condenser should be sufficient, as the power consumption is very limited)
• 1 x photocell

• Enclose the electronic and the solar cell into a ring that can fit many bottle sizes
• Manage the total cost to be less than $0.90
• Design an undestructible To-It-Yourself instructions sheet to create and use the water filter
• Ask for production and distribution help from an NGO like the Billa And Melinda Gates Foundation, the Red Cross, etc.
• Distribute wherever unsanitary drinkable water supply is an issue

https://github.com/GillesdeB/Turbidimeter/blob/master/Turbidimeter.pdf