Geiger Counter

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#include <Adafruit_GFX.h>

#include <Adafruit_SSD1331.h>

#include <SPI.h>

//Connections for the OLED display

#define sclk 13 //SCL (blue wire)

#define mosi 11 //SDA (white wire)

#define cs 10 //CS (grey wire)

#define rst 9 //RES (green wire)

#define dc 8 //DC (yellow wire)

#define LOGtime 1000 //Logging time in milliseconds (1 second)

#define Minute 60000 //the period of 1 minute for calculating the CPM values

#define show endWrite

#define clear() fillScreen(0)

// Color definitions

#define BLACK 0x0000

#define BLUE 0x001F

#define RED 0xF800

#define GREEN 0x07E0

#define CYAN 0x07FF

#define MAGENTA 0xF81F

#define YELLOW 0xFFE0

#define WHITE 0xFFFF

Adafruit_SSD1331 display = Adafruit_SSD1331(cs, dc, rst);

int Counts = 0; //variable containing the number of GM Tube events within the LOGtime

unsigned long previousMillis = 0; //variable for storing the previous time

int AVGCPM = 0; //variable containing the floating average number of counts over a fixed moving window period

int TenSecCPM = 0;

int units = 0;

int tens = 0;

int hundreds = 0;

int thousands = 0;

float Sievert = 0;

int COUNTS[10]; // array for storing the measured amounts of impulses in 10 consecutive 1 second periods

int t = 0;

////////////////////the setup code that follows, will run once after "Power On" or after a RESET///////////////////

void setup() {

Serial.begin(115200);

display.begin();

display.fillScreen(BLACK);

float Battery = analogRead(A3); //(orange wire)

float BattPerc = 100 * (Battery/1030);

//Serial.print ("battery value = "); Serial.println (Battery); Serial.print ("battery percentage = "); Serial.println (BattPerc);

display.setCursor(4,4);

display.setTextSize(2);

display.setTextColor(MAGENTA);

display.println("Battery");

display.setCursor(4,24);

display.print (int (BattPerc)); display.print("."); display.print (int((10*BattPerc)-(10*int(BattPerc)))); display.print(" %");

delay(3000);

display.fillScreen(BLACK);

for (int x = 0; x < 10 ; x++) { //put all data in the Array COUNTS to 0 (Array positions run from 0 to 10;

COUNTS[x] = 0; //10 positions covering a period of 10 seconds

}

attachInterrupt(0, IMPULSE, FALLING); //define external interrupt on pin D2/INT0 to start the interupt routine IMPULSE (green wire)

display.drawRect(0,0,96,64,WHITE);

display.setCursor(4,4);

display.setTextColor(YELLOW);

display.setTextSize(2);

display.print("CPM");

display.setCursor(50,4);

display.setTextSize(1);

display.print("10 sec");

display.setCursor(50,12);

display.print("window");

display.setCursor(4,38);

display.setTextSize(1);

display.setTextColor(GREEN);

display.print("uSv/hr");

display.drawRect(0,48, 96, 16, YELLOW);

}

////////////////////////the loop code that follows, will run repeatedly until "Power Off" or a RESET/////////

void loop()

{

unsigned long currentMillis = millis();

if(currentMillis - previousMillis > LOGtime)

{

previousMillis = currentMillis;

COUNTS[t] = Counts;

for (int y = 0; y < 10 ; y++) { //add all data in the Array COUNTS together

TenSecCPM = TenSecCPM + COUNTS[y]; //and calculate the rolling average CPM over a 10 second period

}

AVGCPM = 6* TenSecCPM;

TenSecCPM = 0;

t++ ;

if (t > 9) { t = 0 ;}

//Serial.print ("COUNTS "); Serial.print(t); Serial.print (" = ");Serial.println (COUNTS[t]);

display.fillRect(4,20,90,17,BLACK); // clear the CPM value field on the display

display.setCursor(4,20);

display.setTextColor(RED);

display.setTextSize(2);

display.println(AVGCPM);

//Serial.print ("AVGCPM = "); Serial.print (AVGCPM); //Serial.print (" CPM = "); Serial.println (CPM);

display.fillRect(45,38,50,10,BLACK); // clear the uSv/Hr value field on the display

display.setCursor(45,38);

display.setTextColor(GREEN);

display.setTextSize(1);

Sievert = (AVGCPM /151.0) ; //Serial.print (" Sievert = "); Serial.println (Sievert);

units = int (Sievert); //Serial.print ("units = "); Serial.println (units);

tens = int ((10*Sievert) - (10*units)); //Serial.print ("tens = "); Serial.println (tens);

hundreds = int ((100*Sievert) - (100*units) - (10* tens)); //Serial.print ("hundreds = "); Serial.println (hundreds);

thousands = int ((1000*Sievert) - (1000*units) - (100*tens) - (10*hundreds)); //Serial.print ("thousands = "); Serial.println (thousands);

display.print (units); display.print("."); display.print (tens); display.print (hundreds); display.println (thousands);

display.fillRect(1,49,94,14,BLACK); // clear the CPM indicator field on the display

display.fillRect(1,49,Counts,14,RED); // fill the CPM indicator field on the display

Counts = 0;

}

}

//////////////////END of LOOP////////////////////////////////////

/////////////////////////////////Hereafter follows the Function for counting the number of impulses from Geiger Counter kit

void IMPULSE()

{

Counts++;

}