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Geiger_counter.pde
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Geiger_counter.pde
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/*
* ------Geiger Tube board (Arduino Code) Example--------
*
* Explanation: This example shows how to get the signal from the Geiger Tube
* in Arduino, we use one of the Arduino interrupt pins (PIN2).
* We count the time (ms) between two pulses of the Geiger tube.
*
* Copyright (C) 2011 Libelium Comunicaciones Distribuidas S.L.
* http://www.libelium.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Version: 0.3
* Design: Marcos Yarza, David Gascon
* Implementation: Marcos Yarza
*/
/*
updated version by Joey Stanford
community code from Stfb included
*/
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(3,4,5,6,7,8);
// Threshold values for the led bar
#define TH1 45
#define TH2 95
#define TH3 200
#define TH4 400
#define TH5 600
// Conversion factor - CPM to uSV/h
#define CONV_FACTOR 0.00812
// Natural average radiation in uSV/h
#define NATURAL_RADIATION 0.27
// Variables
int ledArray [] = {
10,11,12,13,9};
int geiger_input = 2;
long count = 0;
long countPerMinute = 0;
long timePrevious = 0;
long timePreviousMeassure = 0;
long time = 0;
long countPrevious = 0;
float radiationValue = 0.0;
// count one measure at least
int minCount = 0;
// Average radiation measure
float avg = 0;
// Natural radiation factor
int natFactor = 0;
void setup(){
pinMode(geiger_input, INPUT);
digitalWrite(geiger_input,HIGH);
for (int i=0;i<5;i++){
pinMode(ledArray[i],OUTPUT);
}
Serial.begin(19200);
//set up the LCD\'s number of columns and rows:
lcd.begin(16, 2);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Radiation Sensor");
lcd.setCursor(0,1);
lcd.print("Board - Arduino");
delay(1000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Joey Stanford");
lcd.setCursor(0,1);
lcd.print("joey@stan4d.net");
delay(1000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Starting Up...");
attachInterrupt(0,countPulse,FALLING);
}
void loop(){
if (millis()-timePreviousMeassure > 10000){
countPerMinute = 6*count;
radiationValue = countPerMinute * CONV_FACTOR;
timePreviousMeassure = millis();
// Serial.print("☢ ");
Serial.print(countPerMinute,DEC);
Serial.print(",");
Serial.print(radiationValue,4);
Serial.print(",");
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("CPM=");
lcd.setCursor(4,0);
lcd.print(countPerMinute);
lcd.setCursor(0,1);
lcd.print(radiationValue,4);
lcd.setCursor(6,1);
lcd.print(" uSv");
//led var setting
if(countPerMinute <= TH1) ledVar(0);
if((countPerMinute <= TH2)&&(countPerMinute>TH1)) ledVar(1);
if((countPerMinute <= TH3)&&(countPerMinute>TH2)) ledVar(2);
if((countPerMinute <= TH4)&&(countPerMinute>TH3)) ledVar(3);
if((countPerMinute <= TH5)&&(countPerMinute>TH4)) ledVar(4);
if(countPerMinute>TH5) ledVar(5);
count = 0;
minCount++;
}
if(minCount==1){
avg = (avg + radiationValue)/2;
Serial.print(avg,4);
Serial.print(",");
lcd.setCursor(10, 0);
lcd.print(avg,4);
minCount = 0;
lcd.setCursor(11, 1);
lcd.print("X");
natFactor = avg / NATURAL_RADIATION;
Serial.println(natFactor, DEC);
lcd.print(natFactor,DEC);
}
}
void countPulse(){
detachInterrupt(0);
count++;
while(digitalRead(2)==0){
}
attachInterrupt(0,countPulse,FALLING);
}
void ledVar(int value){
if (value > 0){
for(int i=0;i<=value;i++){
digitalWrite(ledArray[i],HIGH);
}
for(int i=5;i>value;i--){
digitalWrite(ledArray[i],LOW);
}
}
else {
for(int i=5;i>=0;i--){
digitalWrite(ledArray[i],LOW);
}
}
}