June UV Sensor Bracelet Teardown #WearableWednesday
June is a UV exposure sensing bracelet by Netatmo. It communicates over Bluetooth low energy to iOS devices, tracking your exposure over time and triggering reminders to reapply SPF. The battery recharges over USB and lasts a month. Check our guide on the Adafruit Learning System for more photos.
The tiny clip easily passes as jewelry, and one of the shiny facets has some holes that let lights in to the UV sensor. We tried to get inside using my typical prying and cutting tools, with no luck. After two hours soaking in acetone, June popped right open.
We used a USB microscope to identify parts on the board:
NRF51822 Nordic bluetooth low energy ARM cortex chip
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.