One-hundred fifteen scales map by area to the number of pangolins represented in a single illegal trade shipment seized
Scales sense when a person touches them, sending a signal to a second, on-screen data visualization
Touching a scale focuses on that data point within an on-screen geographic data visualization
The scales are made of thermoplastic sheets called Worbla that have been laser cut to map the area of a scale to how many pangolins in the shipment are represented by a data point. Each scale then has a piece of window screening hard-wired to a capacitive touch sensor.
Four sensors, allowing for up to 48 scales, are connected to an Arduino Uno. With 115 interactive scales, three arduino unos connect to an Arduino Mega, which in turn connects to a computer running a node web server. When a scale is touched, an event is emitted with sockets to a web page running the geographic data visualization.
Scales are finished off with gesso. The head, legs, and arms are sculpted with thermoplastic pellets.