Sunburn Monitor – A UV monitor

Sunburn Monitor – A UV monitor

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Sunburn Monitor is a UV monitor with sound-based indication. It calculates the max sun exposure before sunburn based on your skin type.

The project was published over hackaday.io by [Quarterturn].

It’s based around SI1132 light sensor from Silicon Labs. SI1132 is a UV index and ambient light sensor with I2C interface and it’s available in 10-lead 2×2 mm QFN package. Sunburn Monitor uses ATMEGA168 MCU where the firmware was developed using Arduino environment.

The design has a protection transistor Q1 (DMP2035U-7) in the input, we covered in a past blog how to protect you circuit from reverse voltage, and Q2 is used to enable/disable the supply voltage of the sensor.

Sunburn Monitor powered by a 3v CR2032 battery with power management relies primarily on either deep sleep via hardware interrupt or watchdog timer interrupt for sleep-wake-sleep monitoring cycles, according to [Quarterturn].

sunburn_PCB

sunburn_top

The source code and the design files, using Eagle CAD, (SCH & BRD) can be found here.
[Project page over hackaday.io]

Embedded Hardware Engineer interested in open hardware and was born in the same year as Linux. Yahya is the editor-in-chief of Atadiat and believes in the importance of sharing free, practical, spam-free and high quality written content with others. His experience with Embedded Systems includes developing firmware with bare-metal C and Arduino, designing PCB&schematic and content creation.

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