More arduino

More arduino test curcuits:

Ping sensor.

Use pin 7 for data.

/* Ping))) SensorThis sketch reads a PING))) ultrasonic rangefinder and returns the
distance to the closest object in range. To do this, it sends a pulse
to the sensor to initiate a reading, then listens for a pulse
to return.  The length of the returning pulse is proportional to
the distance of the object from the sensor.The circuit:
* +V connection of the PING))) attached to +5V
* GND connection of the PING))) attached to ground
* SIG connection of the PING))) attached to digital pin 7http://www.arduino.cc/en/Tutorial/Pingcreated 3 Nov 2008
by David A. Mellis
modified 30 Aug 2011
by Tom IgoeThis example code is in the public domain.*/// this constant won’t change.  It’s the pin number
// of the sensor’s output:
const int pingPin = 7;void setup() {
// initialize serial communication:
Serial.begin(9600);
}void loop()
{
// establish variables for duration of the ping,
// and the distance result in inches and centimeters:
long duration, inches, cm;// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(pingPin, INPUT);
duration = pulseIn(pingPin, HIGH);

// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);

Serial.print(inches);
Serial.print(“in, “);
Serial.print(cm);
Serial.print(“cm”);
Serial.println();

delay(100);
}

long microsecondsToInches(long microseconds)
{
// According to Parallax’s datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second).  This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
// See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}

Servo

use pin 9 for data.

// Sweep
// by BARRAGAN <http://barraganstudio.com&gt;
// This example code is in the public domain.#include <Servo.h>Servo myservo;  // create servo object to control a servo
// a maximum of eight servo objects can be createdint pos = 0;    // variable to store the servo positionvoid setup()
{
myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}void loop()
{
for (pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees
{                                  // in steps of 1 degree
myservo.write(pos);              // tell servo to go to position in variable ‘pos’
delay(15);                       // waits 15ms for the servo to reach the position
}
for(pos = 180; pos>=1; pos-=1)     // goes from 180 degrees to 0 degrees
{
myservo.write(pos);              // tell servo to go to position in variable ‘pos’
delay(15);                       // waits 15ms for the servo to reach the position
}
}

Pir sensor

Use pin 2 for data..

/*
* PIR sensor tester
*/int ledPin = 13;                // choose the pin for the LED
int inputPin = 2;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin statusvoid setup() {
pinMode(ledPin, OUTPUT);      // declare LED as output
pinMode(inputPin, INPUT);     // declare sensor as inputSerial.begin(9600);
}void loop(){
val = digitalRead(inputPin);  // read input value
if (val == HIGH) {            // check if the input is HIGH
digitalWrite(ledPin, HIGH);  // turn LED ON
if (pirState == LOW) {
// we have just turned on
Serial.println(“Motion detected!”);
// We only want to print on the output change, not state
pirState = HIGH;
}
} else {
digitalWrite(ledPin, LOW); // turn LED OFF
if (pirState == HIGH){
// we have just turned of
Serial.println(“Motion ended!”);
// We only want to print on the output change, not state
pirState = LOW;
}
}

)

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