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Sunburn Monitor – A UV monitor [message #166579] Fri, 12 August 2016 09:35
Yahya Tawil
Messages: 5
Registered: July 2016
Junior Member
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].

The source code and the design files, using Eagle CAD, (SCH & BRD) can be found here.
[Project page over hackaday.io]
The post Sunburn Monitor – A UV monitor appeared first on Electronics-Lab.Original article at http://www.electronics-lab.com/sunburn-monitor-sound-base-indication-uv-monitor/.

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