SEN0228

  Gravity: I2C VEML7700 Ambient Light Sensor SKU: SEN0228 Introduction VEML7700 is a high accuracy ambient light digital 16-bit resolution sensor. It includes a high sensitive photo diode, a low noise amplifier, a 16-bit A/D converter and supports an easy to use Gravity I2C interface. It outputs a digital signal directly and no need for complicated calculations. This is a more acurate and easier to use version of the simple foto resistor which only outputs a voltage that needs to be calculated in order to obtain meaningful data. The data which is output by this sensor is directly output in Lux (Lx). When objects which are lighted in homogeneous get the 1 lx luminous flux in one square meter ,their light intensity is 1lx. Sometimes to take good advantage of the illuminant, you can add a reflector to the illuminant. So that there will be more luminous flux in some directions and it can increase the ilumination of the target surface. For example:         Night: 0.001--0.02; Moonlightnight:0.02--0.3; Cloudy indoor:5--50; Cloudy outdoor:50--500; Sunny indoor:100--1000; Under the sunlight in summer afternoon: about 10*6 power; Reading books for intensity of illumination:50--60; Home video standard intensity of illumination:1400. Specification         Supply Voltage: 3.3-5V Working Current: 45uA Shutdown Mode: 0.5uA Measuring Range: 0-120klx Accuracy: 0.0036 lx / ct Working Temperature: -25 ~ +85 Dimension: 30 × 22 (mm) /1.81 x0.866 (inches) Weight: 12g Board Overview Gravity: I2C VEML7700 Ambient Light Sensor Num Label Description 1 SDA IIC-Data 2 SCL IIC-Clock 3 GND GND 4 VCC VCC  Tutorial Requirements  Hardware DFRduino UNO (or similar) x 1 Gravity: I2C VEML7700 Ambient Light Sensor x1 M-M/F-M/F-F Jumper wires  Software Arduino IDE, Click to Download Arduino IDE from Arduino® https://www.arduino.cc/en/Main/Software%7C Connection Diagram Arduino Connection Sample Code Download VEML7700 Arduino Library https://github.com/DFRobot/DFRobot_VEML7700 How to install Libraries in Arduino IDE https://www.arduino.cc/en/Guide/Libraries#.UxU8mdzF9H0%7C /*! * @file readVEML770.ino * @brief DFRobot's Digital Ambient Light Sensor * @n This example read the Lux from Digital Ambient Light Sensor, and then p rint them * * @copyright [DFRobot](http://www.dfrobot.com), 2016 * @copyright GNU Lesser General Public License * * @version * @date V1.0 2016-12-06 */ #include #include "DFRobot_VEML7700.h" DFRobot_VEML7700 als; void setup() { Serial.begin(9600); als.begin(); } void loop() { float lux; Serial.print("Lux: ");//Read Lux and print Serial.print(lux); Serial.println(" lx"); delay(500); } Expected Results Result https://www.dfrobot.com/wiki/index.php/Gravity:_I2C_VEML7700_Ambient_Light_Sensor_SKU:_SEN0228 9‐19‐17