Determining water quality to understand human influence

• plastic glasses
• development board, 170 points
• Light-emitting diode
• drinking straws
• double-sided alligator clips
• stainless steel wire
• copper or aluminum adhesive tape 10 cm strip
• coffee stir sticks
• 100 ohm resistor
• distilled water, 1 l
• AA batteries
• AA battery holder

Reusable materials

• 1 microcontroller (Arduino)
• 1 USB A-to-B cable for Arduino
• 1 development board

Set of tools

• wire strippers
• clear tape
• ruler
• scissors
• hot glue gun
• stopwatch
• marker