light set to increase in intensity when outside objects closen
overview
the guts. Arduino Uno, breadboard, power unit
Ultrasonic Proximity Sensor
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CODE:
//Feel free to use this code.
//Please be respectful by acknowledging the author in the code if you use or modify it.
//Author: Bruce Allen
//Date: 23/07/09
//Digital pin 7 for reading in the pulse width from the MaxSonar device.
//This variable is a constant because the pin will not change throughout execution of this code.
const int pwPin = 7;
//variables needed to store values
long pulse, inches, cm;
void setup() {
//This opens up a serial connection to shoot the results back to the PC console
Serial.begin(9600);
}
void loop() {
pinMode(pwPin, INPUT);
//Used to read in the pulse that is being sent by the MaxSonar device.
//Pulse Width representation with a scale factor of 147 uS per Inch.
pulse = pulseIn(pwPin, HIGH);
//147uS per inch
inches = pulse/147;
//change inches to centimetres
cm = inches * 2.54;
Serial.print(cm);
Serial.print(“cm”);
Serial.println();
delay(500);
}