Arduino based Applications-part 5
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The PIR motion sensor detects movement through detecting infrared radiation emitted by moving objects. It is a 3-pin device that requires 5-9VDC of power. When motion is detected, the output pin goes high and it can detect movement within a 110°x70° range up to 6 meters away. An Arduino motion sensor light circuit uses a PIR sensor to detect motion and turn on an LED. When motion is detected, the LED turns on for 60 seconds then turns off.
Arduino based Applications-part 5
- 1. PIR Motion Sensor 1 By JawaherA.Fadhil
- 2. PIR motion sensor The PIR motion sensor is a sensor which detects movement through picking up infrared radiation. Being that a person emits infrared radiation, the detector is able to detect this and react, according to the how the circuit is designed to react. The sensor can also pick up the movement of inanimate objects as well, such a rolling ball, because as those objects move, friction acts on them, generating heat. This heat emits infrared radiation, which the PIR sensors may be able to detect if great enough. 2By JawaherA.Fadhil
- 3. PIR motion sensor The PIR motion sensor is a 3-pin device. 3 Pin1 is the pin which receives the positive DC voltage. The PIR motion sensor needs between 5V-9VDC of power for operation. Pin2 is the Output pin of the PIR module. Pin3 is the ground pin of the device. When motion is detected by the PIR, its output will go high. If there is no motion is detected, its output low and it gives off practically no voltage. By JawaherA.Fadhil
- 4. PIR motion sensor This sensor has a sensitivity range up to 20 feet (6 meters) and a 110° x 70° detection range, making it a wide lens detection sensor. This means it can measure 110° vertically (from top to bottom) and 70° horizontally (from left to right). The best way to check its sensitivity is when the circuit is built, try moving around through all of its angles. See at which angles it can detect your movement and at which angles it is not able to detect your movement, meaning your out of its angle scope. A lot of it is trial and error and experimenting. Once you know where it can and cannot detect, you can place it in an optimal place where it can detect in areas where you want it to. 4By JawaherA.Fadhil
- 5. Arduino Motion Sensor Light Circuit In this project, we will go over how to build a motion sensor light circuit with an Arduino. a light turns on when motion is detected. Components Needed • Arduino Board • PIR motion sensor • LED • USB Cable 5By JawaherA.Fadhil
- 6. Arduino Motion Sensor Light Circuit 6By JawaherA.Fadhil
- 7. Arduino Motion Sensor Light Circuit The schematic diagram of this circuit is: 7By JawaherA.Fadhil
- 8. Arduino Motion Sensor Light Circuit 8 //code for motion sensor circuit const int ledPin= 13; const int motPin= 2; void setup() { pinMode(ledPin, OUTPUT); pinMode(motPin, INPUT); } void loop() { int value= digitalRead(motPin); By JawaherA.Fadhil
- 9. Arduino Motion Sensor Light Circuit if (value == HIGH) { digitalWrite(ledPin, HIGH); delay(60000); digitalWrite(ledPin, LOW); } else { digitalWrite(ledPin, LOW); } } 9By JawaherA.Fadhil
- 11. Temperature Sensor LM35 is an analog temperature sensor used to read the Temperature of the surrounding environment. The output voltage varies linearly with change in temperature. It can measure temperature from-55 degree celsius to +150 degree celsius. The voltage output of the LM35 increases 10mV per degree Celsius rise in temperature. The IC has just 3 pins, 2 for the power supply and one for the analog output. 11By JawaherA.Fadhil
- 12. Temperature Sensor The output of LM35 is an analog signal. Microcontrollers don't accept analog signals as their input directly. We need to convert this analog output signal to digital before we can feed it to a microcontroller’s input. For this purpose, we can use an ADC( Analog to Digital Converter).If we are using a basic microcontroller like 8051, we need to use an external ADC. But modern day microcontrollers like Arduino come with inbuilt ADC. Arduino Uno has an in built 10 bit ADC (6 channel).Can be Used to convert the analog output of LM35 to digital output. 12By JawaherA.Fadhil
- 13. Temperature Sensor Components Needed to Build the LM35 Temperature Sensor Circuit: • Arduino Board • LM35 Temperature Sensor IC • Computer • USB Cable 13By JawaherA.Fadhil
- 14. Temperature Sensor Circuit Schematic 14By JawaherA.Fadhil
- 15. Code for Temperature Sensor float temp; void Setup() { Serial.begin(9600); } void loop() { temp=analogRead(0); temp*= 0.00488 *100; // ADC (5v/1024)then convert to celsius Serial.println(" Temp Sensor = "); Serial.println(temp); delay(1000); } 15By JawaherA.Fadhil
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- 17. NOTE To print a specific amount of decimal places, just specify the number of digits after the floating-point number to be displayed: Serial.Print(1.2345, 0); // Prints "1" Serial.print(1.2345, 1); // Prints "1.2" Serial.print(1.2345, 4); // Prints "1.2345" By JawaherA.Fadhil 17