This week I decided to create a switch that worked on the basis of water conducting electricity.
With that, I decided to create a switch turned on by the tears of unviersity students.
It was simple: cry enough into the bowl and the LED will light up.
To do this I attached copper strips inside the bowl so that when the water level inside the bowl was high enough the water would ‘connect’ the two copper tape strips into completing the circuit.
Challenges:
One of the challenges was figuring out even if at wall the current would be strong enough to pass through the water.
Another thing was a stupid ‘bug’ where I had used a photoresistor, not a normal resistor, and pondered for a long time why the circuit was not completing.
Future improvements:
One thing I’d like to improve on is to maybe have different circuits of copper tape in such as way that more LEDs light up the more tears there are in the bowl. with 3 lit LEDs representing a full bowl or something like that.