Question

Based on the hardware you designed, write a code that takes temperature measurement every 5 seconds and display the temperature in Fahrenheit degrees in the format of xxx.x (for example: 098.6 or 104.8) on the 4-bank seven-segment LED display.

Answer 1

Temperature measurements and display on 7 segments

int temp;
int tempPin = A2;
int x,y;
int bcd_array[10][7] = { { 0,0,0,0,0,0,1 }, // 0
{ 1,0,0,1,1,1,1 }, // 1
{ 0,0,1,0,0,1,0 }, // 2
{ 0,0,0,0,1,1,0 }, // 3
{ 1,0,0,1,1,0,0 }, // 4
{ 0,1,0,0,1,0,0 }, // 5
{ 0,1,0,0,0,0,0 }, // 6
{ 0,0,0,1,1,1,1 }, // 7
{ 0,0,0,0,0,0,0 }, // 8
{ 0,0,0,1,1,0,0 }}; // 9

void BCD0(int);
void BCD1(int);

void setup()
{
pinMode(2, OUTPUT);   
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(A2, INPUT);
pinMode(9, OUTPUT);   
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
pinMode(14, OUTPUT);
pinMode(15, OUTPUT);
}

void loop()
{
temp = analogRead(tempPin);
temp = temp * 0.48828125;
x = (temp/10);
y = (temp -((temp / 10) * 10));
delay(1000)
BCD0(x);
BCD1(y);
}

void BCD0(int number)
{
int pin= 2;
for (int j=0; j < 7; j++) {
digitalWrite(pin, bcd_array[number][j]);
pin++;
}
}

void BCD1(int number)
{
int pin= 9;
for (int j=0; j < 7; j++) {
digitalWrite(pin, bcd_array[number][j]);
pin++;
}
}