Difference between revisions of "The Use of Light Sensor"

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(Created page with "{| style="width: 800px;" |- | ==Objective== How to use Microduino light sensor. ==Equipment== *'''Microduino-CoreUSB''' *'''Microduino-Light Intensity Sensor''' *'...")
 
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{| style="width: 800px;"
 
{| style="width: 800px;"
 
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==Objective==
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==Outline==
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Microduino-Light adopts photosensitive resistor. It uses a resistor that is based on semiconductor's photoelectric effect and is able to change along with the intensity of t the incident light. The photosensitive resistor is generally applied in light measurement, light control and photoelectric conversion.   
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How to use Microduino light sensor.   
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==Specification==
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*Electrical features
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==Equipment==
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**The brighter the light is, the bigger the output voltage gets.
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*'''[[Microduino-CoreUSB]]'''
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**Output analog quantity 
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*'''[[Microduino-Light Intensity Sensor]]'''
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*Tech parameter
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*'''[[Microduino-Sensorhub]]'''
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**Bright Resistance(10Lux): 8-20KΩ
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**Dark Resistance: 1MΩ
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**Sensitivity: Under the light of 10Lux and 100Lux, the resistance rate is (R10/R100) =0.8
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*Size
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**Size of the Board: 20mm*10mm
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**1.27mm-pitch 4Pin interface;
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*Connection method
 +
**Pin Description: GND, VCC, signal and NC. It needs analog port（A0-A7）to detect.
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[[File:sensor-light.jpg|center|400px]]
  
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==Development==
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===Equipment===
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{|class="wikitable"
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|-
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|Module||Number||Function
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|-
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|[[mCookie-CoreUSB]]||1||Core board
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|-
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|[[mCookie-Hub]]||1||Sensor pin board
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|-
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|[[Microduino-Light]]||1||Photosensitive sensor 
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|}
  
 
*Other Hardware Equipment  
 
*Other Hardware Equipment  
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**1x USB cable
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**One USB cable  
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[[File:module-light.jpg|600px|center]]
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==Program==
 
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==Debugging==
 
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Step 1: Connect A2 pin of Microduino-SensorHub to Microduino light intensity sensor and D6 to Microduino buzzer.
 
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[[File:MicroduinoLightSensor.png|600px|center|thumb]]
 
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Step 2:
 
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Connect your PC with USB cable, download and burn it to Microduino-CoreUSB.  
 
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[[File:MicroduinoLightSensor1.png|600px|center|thumb]]
 
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Step 3:
 
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Power on and you can hear the sound of a buzzer.
 
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[[File:MicroduinoLightSensor2.png|600px|center|thumb]]
 
  
 +
===Preparation===
 +
*Setup 1：Connect Microduino-Light and the A0 analog port of the Hub. 
 +
[[file:mCookie-pir-sensor.JPG|600px|center]]
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*Setup 2：Connect the CoreUSB, Hub and Light to the computer with a USB cable.
 +
[[file:mCookie-Light-pc.JPG|600px|center]]
  
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Step 4:  
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===Experiment: Detect analog Brightness Value ===
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Change light intensity to change the sound.  
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* Open Arduino IDE and copy the following code into IDE.
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[[File:MicroduinoLightSensor3.png|600px|center|thumb]]
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<source lang="cpp">
 +
#define  sensorPin  A0
  
 +
int state;
  
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==Result==
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void setup()
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{
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  pinMode(sensorPin, INPUT);
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  Serial.begin(9600);
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}
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void loop()
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{
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  state = analogRead(sensorPin);
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  Serial.print("state:");
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  Serial.println(state);
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  delay(100);
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}
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</source>
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* Select the right board from Tools→Serial Port in Arduino IDE and download the program. [[file:upload.JPG|500px|center]]
 +
*After the download, you can open the serial monitor. The disp
 +
After the download, you can open the serial monitor. The displayed value reflects the current light intensity.
 +
[[file:mCookie-pir-res.JPG|500px|center]]
 +
*Result  
 +
The stronger the light is, the greater the output value becomes. Therefore, you can build some projects controlled by light intensity change.
  
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You can change sound through light sensor.  
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===Program Debugging===
 +
*“#define  sensorPin  A0”defines sensor interface.
 +
*Use“analogRead(sensorPin);”function to read the output analog value of the sensor and therefore, to judge light intensity change.  
  
 +
==Application==
 +
*Light-control street lamp
 
==Video==
 
==Video==
  
 
|}
 
|}

Revision as of 06:24, 4 November 2015

Outline

Microduino-Light adopts photosensitive resistor. It uses a resistor that is based on semiconductor's photoelectric effect and is able to change along with the intensity of t the incident light. The photosensitive resistor is generally applied in light measurement, light control and photoelectric conversion.

Specification

  • Electrical features
    • The brighter the light is, the bigger the output voltage gets.
    • Output analog quantity
  • Tech parameter
    • Bright Resistance(10Lux): 8-20KΩ
    • Dark Resistance: 1MΩ
    • Sensitivity: Under the light of 10Lux and 100Lux, the resistance rate is (R10/R100) =0.8
  • Size
    • Size of the Board: 20mm*10mm
    • 1.27mm-pitch 4Pin interface;
  • Connection method
    • Pin Description: GND, VCC, signal and NC. It needs analog port（A0-A7）to detect.
400px

Development

Equipment

Module Number Function
mCookie-CoreUSB 1 Core board
mCookie-Hub 1 Sensor pin board
Microduino-Light 1 Photosensitive sensor
  • Other Hardware Equipment
    • One USB cable
Module-light.jpg

Preparation

  • Setup 1：Connect Microduino-Light and the A0 analog port of the Hub.
MCookie-pir-sensor.JPG
  • Setup 2：Connect the CoreUSB, Hub and Light to the computer with a USB cable.
MCookie-Light-pc.JPG

Experiment: Detect analog Brightness Value

  • Open Arduino IDE and copy the following code into IDE.
#define  sensorPin  A0

int state;

void setup()
{
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}
void loop()
{
  state = analogRead(sensorPin);
  Serial.print("state:");
  Serial.println(state);
  delay(100);
}
  • Select the right board from Tools→Serial Port in Arduino IDE and download the program.
    Upload.JPG
  • After the download, you can open the serial monitor. The disp

After the download, you can open the serial monitor. The displayed value reflects the current light intensity.

MCookie-pir-res.JPG
  • Result

The stronger the light is, the greater the output value becomes. Therefore, you can build some projects controlled by light intensity change.

Program Debugging

  • “#define sensorPin A0”defines sensor interface.
  • Use“analogRead(sensorPin);”function to read the output analog value of the sensor and therefore, to judge light intensity change.

Application

  • Light-control street lamp

Video

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