... Measuring the speed radar. After much time I open the blog again to start a new project ...
designed circuit is capable of measuring the velocity of an object passing between two sensors, the "heart" of the circuit is the Arduino system, which is a section on this page.
This radar is capable of measuring speeds between 0 and 500km / h, once it detects the speed displayed on a backlit LCD screen, send a message to the PC and if the measured speed exceeds the specified will activate a camera and displays a message on both screens (PC and LCD).
A sensor detects the passage of the object and stores a time constant, passing through the second sensor keeps a second time constant to measure the time it takes to pass between the two sensors, subtracts the time of the first sensor while the second sensor.
Then follow the data to convert to Km / h.
! Sensors are 10 cm away!
Parts list
· Arduino Duemilanove.
· LCD display hitachi blue 44780. 16x2.
· Sensors sharp 2D120X
· 4.7 K potentiometer
· Serve Futaba S3003
alpha * Software Arduino 0013. Sensor
sharp 2D120X
The sharp 2d120X analog sensor is a distance, has an analog value in relation to the object distance, the greater the distance less stress and vice versa.
The function of the servo, is none other than pressing the button shutter of the camera ... (not available for PC-controlled camera, or with remote trigger.) The servo makes a little money at the time of activation of the "radar" you press the shutter button.
to activate the radar also activates the exit 13 of the arduino where we can connect a trigger "more professional" for example a camera or flash.
to handle any cargo from the arduino need to use a relay to do so assemble this circuit:
The complete circuit has been mounted as follows:
The code rduino program is as follows:
# include # define route 50
radar 13 # define MAX 50 # define
Tiemposensor1 unsigned long int, Tiemposensor2 / / declare variables int long
RealTime;
int x, x2;
int distance = 400;
sensor1 int = 0;
sensor2 int = 1;
float speed;
LiquidCrystal
lcd (12, 11, 10, 5, 4, 3, 2); / / are chosen to control the LCD pin
void setup () {
Serial.begin (9600) / / 9600 baud transmission rate
pinMode (sensor1, INPUT) / / sensor 1 and 2 as inputs.
pinMode (sensor2, INPUT);
pinMode (radar, OUTPUT) / / Output radar
} void loop () {x = analogRead
(Sensor1) / / read the sensor 1 until the distance is less than the selected
do {x = analogRead (sensor1)
} while (x < tiemposensor1 =" millis();" x2 ="analogRead" x2 =" analogRead" tiemposensor2 =" millis();" tiemporeal =" (Tiemposensor2" velocidad =" ((0.1" velocidad =" espacio/"> MAX) {/ / if the speed is greater than the maximum speed
predefined digitalWrite (radar, HIGH) / / active radar
the delay (200);
digitalWrite (radar, LOW);
Serial.print ("Excessive speed ... RADAR ON") / / message on the Serial.println
PC screen (speed);
lcd.clear ();
lcd.home ();
lcd.print (ON RADAR !!!"); / / message on the LCD
delay (500) ;
}}
example of an image taken by the "radar" with a model:
collaborated in this project to David Alfaro Muñoz.
At a time more or least 10 years ago in a small town in the Peruvian Andes in a dark forest full of ice and deep darkness, gloom and living spaces a inseparable friends and adventurers, these friends were called Luis and Jorge. Luis was a young adventurer, a young George a little apprehensive. 
These creatures out at night and began to rule his land in the dark skies and singing a song to listen felt strange sensations of pain, sadness and regret, perhaps through the sound transmitted to us their feelings and perhaps were unhappy at not being able to show the world, only to emerge at nightfall, and where they were protected by the vast darkness of the ignorant and disturbed night hunters, where our young players regretted having belonged to them, and Jorge Luis and some friends decided on a night hunt, and I think that was the dumbest 
they did in your life, but I do not think, it was they were afraid, especially Luis, but still set off an abandoned house where they lived, even with the fear that had managed to catch one, could not believe it had a strange kind but the moment of happiness was short-lived as we realized it was a very beautiful bird, the bird began to sing and gave us a strange sense of solitude and captivity, we are so impressed we decided to release this majestic bird of the night. 
A sensor detects the passage of the object and stores a time constant, passing through the second sensor keeps a second time constant to measure the time it takes to pass between the two sensors, subtracts the time of the first sensor while the second sensor. 
