I was offered this suggestion in the past and used this to get everything up and running
http://www.ladyada.net/learn/sensors/pir.htmlThe only alteration I made that enables some control over the gun firing time is an added delay(10); as seen below (this allows for the 4 sec. firing time)
/*
* 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 status
void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output
pinMode(inputPin, INPUT); // declare sensor as input
Serial.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
delay (10);
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;
delay (10);
}
} 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;
}
}
}
Does the PIR sensor put out too much power to drop the time?
is that a silly question? I'm a novice at best when tackling these issues.
Thanks all
