We have recently made headway in our hardware exploration of sophisticated capacitive sensing systems involving aluminum tape, a 9V battery and cups from Parnassus. By applying the aluminum tape to precisely calculated positions on the cup... on opposite sides, a capacitive field can be generated that is capable of measuring the quantity of water in the cup. This is made possible with the CapSense library and a 1 mega ohm resistor. By utilizing a high level of resistance in the circuit, the capacitance and in turn the volume of water can be measured precisely.
In the following video you will observe the capabilities of our duino in measuring the quantity of water in a cup. An l.e.d. as been attached that has a brightness based on the measured quantity of water. The light increases and decreases in brightness as water is added and taken away respectively. Additionally you can see the rave response our duino received from its critics.
Arduino: Water Power from Katie Suskin on Vimeo.
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