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Arduino
Arduino is a microcontroller board that contains an onboard power supply, USB port, and Atmel microcontroller chip. It simplifies creating control systems by providing a standard, programmable board without requiring complex PCB design. An ultrasonic sensor uses echoing sound waves to evaluate attributes of nearby targets, and the document provides code to interface an ultrasonic sensor with Arduino to measure distance and trigger an alarm.
Arduino
- 1. What is Arduino •A microcontroller board, contains on-board power supply, usb port to communicate with pc and an Atmel microcontroller chip. • It simplify the proces of creating any control system by providing the standard board that can be programmed and connected to the system without the need to any sophisticated PCB design. • An OPEN-SOURCE hardware.
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- 4. Arduino philosophy isto learn by practicing so… Let’s do what Arduino wants…
- 5. Ultrasonic sensor It isa sensor that work on a principle similar to radar, which evaulate attributes of a target by interpreting the echoes from radio or sound waves respectively.
- 7. A simple circuitusing this sensor…
- 8. Using the codebelow we can read from Arduino the distance of different objects • int echo=9; • int trig= 10; • int distance;
- 9. void setup() • { •Serial.begin (9600); • pinMode (echo,INPUT); • pinMode (trig, OUTPUT); • }
- 10. void loop () •{ • digitalWrite (trig, LOW); • delay (2); • digitalWrite (trig, HIGH); • delay (2); • digitalWrite (trig, LOW); • distance=pulseIn (echo,HIGH); • distance=distance/58; • • Serial.println(distance); • }
- 11. Now that weall know how ultrasonic sensor works, let’s add a buzzer and modify the code
- 12. • int echo=9; •int trig= 10; • int distance; • int buzz= 8;
- 13. void setup () •{ • Serial.begin (9600); • pinMode (echo,INPUT); • pinMode (trig, OUTPUT); • pinMode ( buzz, OUTPUT); • }
- 14. Void loop () •void loop () • { • digitalWrite (trig, LOW); • delay (2); • digitalWrite (trig, HIGH); • delay (2); • digitalWrite (trig, LOW); • distance=pulseIn (echo,HIGH); • distance=distance/58; • if (distance < 7) •
- 15. • digitalWrite (buzz,HIGH); • else • digitalWrite (buzz, LOW ); • • Serial.println(distance); • }
- 16. Let’s try somethingelse that is called : Double – Touch Sensor.
- 18. You know whatcomes next: The Code… • #include <CapacitiveSensor.h> • CapacitiveSensor capSensor = CapacitiveSensor(4,2); • boolean ledstate=LOW; • int sensorValue; • int sensor; • const int ledPin = 8;
- 19. • void setup(){ • Serial.begin(9600); • pinMode(ledPin, OUTPUT); • } • void loop() { • sensorValue = capSensor.capacitiveSensor(30); • if(sensorValue > 0) { • ledstate =!ledstate; • } • Serial.println(sensorValue); • • digitalWrite(ledPin,ledstate); • delay(500); • }
- 20. And for desert… Let’stransform all this to an alarm system using: Arduino, an ultrasonic sensor, a buzzer and a rgb led.
- 22. • #define TRIGPIN10 • #define ECHOPIN 9 • int buzz=8; • int red=7,green=6,blue=5;
- 23. void setup () •{ • Serial.begin(9600); • pinMode(ECHOPIN,INPUT); • pinMode(TRIGPIN,OUTPUT); • pinMode (buzz,OUTPUT); • pinMode (red,OUTPUT); • pinMode (green,OUTPUT); • pinMode (blue, OUTPUT); • }
- 24. void loop () •{ • digitalWrite (buzz,LOW); • digitalWrite (red,LOW); • digitalWrite (green,LOW); • digitalWrite (blue,LOW); • digitalWrite(TRIGPIN,LOW); • delayMicroseconds(2); • digitalWrite(TRIGPIN,HIGH); • delayMicroseconds(2); • digitalWrite(TRIGPIN,LOW);
- 25. • int distance=pulseIn(ECHOPIN,HIGH); •distance=distance/58; • if (distance>20) • { digitalWrite (green,HIGH); • digitalWrite (buzz,LOW); • } • else if (distance>10 && distance<20) • { • digitalWrite (green, LOW); • digitalWrite ( blue,HIGH); • digitalWrite (buzz,LOW); • }
- 26. • else if( distance>0 && distance <10 ) • { • digitalWrite (green, LOW); • digitalWrite (blue,LOW); • digitalWrite (red, HIGH); • digitalWrite (buzz,HIGH); • } • • Serial.println (distance); • delay(100); • }