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ML8511 ULTRAVIOLET SENSOR

Price :
Rs.400.00/-
Quantity :  
  • 5 Units in Stock

DESCRIPTION

PROJECT NAME:  ML8511 UV Sensor

PROJECT  DESCRIPTION:

The ML8511 sensor breakout is an easy to use ultraviolet light sensor. The MP8511 UV Sensor outputs an analog signal in relation to the amount of UV light it detects. This can be handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions.

This sensor detects 280-390nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning rays) spectrum. The ML8511 sensor is very easy to use. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2). If your microcontroller can do an analog to voltage conversion, then you can detect the level of UV. Next, connect the following ML8511 breakout board to Arduino:

LAPIS Semiconductor developed the UV sensor ( ML8511A ) to detect a ultra violet rays with Si ( silicon ) device using the original SOI ( silicon on insulator ) technology.
The ML8511A measures the amount of ultra violet rayses contained in sunlight, and it is used for the equipment which displays the suntan by a ultra violet rays, the guidance for UV care of skin, etc. 
The ML8511A is ideal for mobile computing devices, such as a smart phone, a mobile phone, and a watch, at low power and a compact package (QFN).

  • ML8511 / Arduino
  • 3.3V = 3.3V
  • OUT = A0
  • GND = GND
  • EN = 3.3V
  • Arduino 3.3V = Arduino A1

These last two connections are a little different. Connect the EN pin on the breakout to 3.3V to enable the device. Also connect the 3.3V pin of the Arduino to Arduino analog pin 1.

This example uses a neat trick. Analog to digital conversions rely completely on VCC. We assume this is 5.0V, but if the board is powered from USB this may be as high as 5.25V or as low as 4.75V. Because of this unknown window, it makes the ADC on the Arduino fairly inaccurate. To fix this, we use the very accurate onboard 3.3V reference (accurate within 1%). So by doing an analog to digital conversion on the 3.3V pin (by connecting it to A1) and then comparing this reading against the reading from the sensor, we can extrapolate a true-to-life reading, no matter what VIN is (as long as it’s above 3.4V).

FEATURES:

  • Optical sensor to UV-A and UV-B
  • Realize equalization of an output voltage by trimming
  • The analog voltage output proportional to UV light intensity
  • Low current operation ( 300µA Typ. )
    and low standby current ( 0.1µA Typ. )
  • Compact QFN package ( 4.0mm × 3.7mm × 0.73mm )
  • The TSV-CSP version is under development
    for the further small size package( 2.1 × 1.8mm )

Applications :

  • Wireless PC peripherals
  • UV skin care monitor of ageing etc
  • As a sensor network node in sunshine and environment monitor
  • Industrial usues such as sterilization and washing
  • As a UV monitor of mobile computing device such as
  • Smart phones
  • Mobile phones
  • Games
  • Mobile accessories
  • Watch

Specifications:

Parameter

Specification

Part No.

ML8511A

Functional description

UV sensor with amplifier circuit

Operating voltage

2.7 to 3.6V

Operating temperature

-20 to +70°C

Maximum-sensitivity wave length

365nm

Sensitivity region

UV-A and UV-B

Output type

Analog

Current Consumption
(Operating mode / Standby mode)

300µA / 0.1µA

Pin diagram:

PIN NO

Name

Description

1

EN

ENABLE

2

OUT

OUTPUT PIN

3

GND

GROUND

4

3.3V

INPUT VOLTAGE

 


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