In sunny California taking a Hike or visiting the beach comes with the risk of overexposure to UV light, but staying indoors constantly leads to a Vitamin D deficit caused by underexposure to sunlight. Wouldn’t it be great if there was a wearable device that calculates the UV index you personally experience in real time and lets you know your exposure levels. It would be great! And that’s why we built it.
What it does
A weather apps blanket UV rating is often ignored because it has no metric that's applicable to an individual in the outdoors, our device tracks your hours or minutes of UV exposure and calculates whether you are underexposed, within an ideal dose for Vitamin D production or if you are overexposed and need to get under shade.
How we built it
We utilized a UV light sensor that outputs the raw UV light intensity and calculated the UV index, that is employed universally to represent UV exposure. The calculations are done in real time on an Arduino Nano, which then displays both the current UV index as well as your exposure level.
Challenges we ran into
We ran into challenges getting the components to fit into a small enough form factor, as well as not being able to 3D print a housing due to high demand of the printers. Displaying all the qualitative data we wanted concisely was also a challenge.
Accomplishments that we're proud of
The calculation of UV Index values using raw sensor data, tracking personal exposure time.
What we learned
Knowledge on UV light and exposure. Hacking OLED display. Displaying multiple pages on the screen.
What's next for UV Watch
Improve the precision by upgrading the UV sensor. Enhance the user experience by upgrading the OLED display. To take this project further, we can design this project using a PCB board to make it more compact and energy-efficient.