So you would like to build a wearable device that notifies you when the International Space Station is flying overhead? ISS Pin is a project from Adafruit that lets you do just that. It consists of a Particle Photon microcontroller and an Adafruit Neopixel ring.
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The pin displays an orbiting white light when nothing is happening. It turns blue, white, or red when there is any activity. IFTTT was used to complete this project.
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