Make: Volume 77

DEEPER LEARNING: Articial Nose

Press the 5-way joystick button to enter

Inference mode. The screen should now indicate

what scent is being detected with the highest

level of confidence. This basic model can smell

coffee, tea, whiskey, and rum.

MORE SENSORS, MORE SCENTS

You might find yourself limited by the capabilities

and accuracy of the sensor used in this build.

In my experience, it’s working fine for telling

a handful of scents apart — I first used it to

distinguish between a few brands of my favorite

spirits. But your project might involve classifying

dozens of very similar scents, or scents that don’t

graph distinctively on this particular ...