Concept
For this assignment we were required to get creative with creating an unusual switch. At first I thought of using sanitizer spray in the concept of the switch, but later on I decided to stick with water.
Circuit
The circuit makes use of a moisture sensor that allows electricity to pass through depending on whether there is moisture or not, in this case water. So when the sensor is dipped inside the water, the switch goes off, and when taken out the LED turns on again.
Result