Seven segment displays are commonly used display that has many applications in our day to day life. Seven segment display has seven segments and a dot point by which we can create all numbers from 0 to 9.
Seven segment displays are of two types. Common anode displays and common cathode displays.
Arduino Program to demonstrate the function of LT pin of 4511.
int LT = 7;
int BL = 6;
int LE = 5;
int D_ZERO = 8;
int D_ONE = 9;
int D_TWO = 10;
int D_THREE = 11;
void setup()
{
pinMode(LT, OUTPUT);
pinMode(BL, OUTPUT);
pinMode(LE, OUTPUT);
pinMode(D_ZERO , OUTPUT);
pinMode(D_ONE , OUTPUT);
pinMode(D_TWO , OUTPUT);
pinMode(D_THREE, OUTPUT);
digitalWrite(LT, LOW);
digitalWrite(BL, HIGH);
digitalWrite(LE, LOW);
digitalWrite(D_ZERO , HIGH);
digitalWrite(D_ONE , LOW);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
}
void loop()
{
}
Output:
When LT is LOW, all of the output segments will be HIGH independant of all the other inputs.
Arduino Program to demonstrate the function of BL pin of 4511.
int LT = 7;
int BL = 6;
int LE = 5;
int D_ZERO = 8;
int D_ONE = 9;
int D_TWO = 10;
int D_THREE = 11;
void setup()
{
pinMode(LT, OUTPUT);
pinMode(BL, OUTPUT);
pinMode(LE, OUTPUT);
pinMode(D_ZERO , OUTPUT);
pinMode(D_ONE , OUTPUT);
pinMode(D_TWO , OUTPUT);
pinMode(D_THREE, OUTPUT);
digitalWrite(LT, HIGH);
digitalWrite(BL, LOW);
digitalWrite(LE, LOW);
digitalWrite(D_ZERO , HIGH);
digitalWrite(D_ONE , LOW);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
}
void loop()
{
}
Output:
When LT is HIGH, if BL is LOW, then all the segments will be LOW independant of all the other inputs.
Arduino Program to demonstrate the function of LE pin of 4511.
When LE is LOW and BL is HIGH, state of segments Qa - Qg will be determined by the state of D0 - D3. When LE goes HIGH, last data present on D0 - D3 will be stored in latches and the output segments Qa - Qg will remain unchanged.
int LT = 7;
int BL = 6;
int LE = 5;
int D_ZERO = 8;
int D_ONE = 9;
int D_TWO = 10;
int D_THREE = 11;
void setup()
{
pinMode(LT, OUTPUT);
pinMode(BL, OUTPUT);
pinMode(LE, OUTPUT);
pinMode(D_ZERO , OUTPUT);
pinMode(D_ONE , OUTPUT);
pinMode(D_TWO , OUTPUT);
pinMode(D_THREE, OUTPUT);
digitalWrite(LT, HIGH);
digitalWrite(BL, HIGH);
digitalWrite(LE, LOW);
digitalWrite(D_ZERO , HIGH);
digitalWrite(D_ONE , LOW);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
delay(1000);
digitalWrite(LT, HIGH);
digitalWrite(BL, HIGH);
digitalWrite(LE, LOW);
digitalWrite(D_ZERO , LOW);
digitalWrite(D_ONE , HIGH);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
}
void loop()
{
}
Output:
Above program will display "1". After one second it will display "2".
Now upload the following program.
int LT = 7;
int BL = 6;
int LE = 5;
int D_ZERO = 8;
int D_ONE = 9;
int D_TWO = 10;
int D_THREE = 11;
void setup()
{
pinMode(LT, OUTPUT);
pinMode(BL, OUTPUT);
pinMode(LE, OUTPUT);
pinMode(D_ZERO , OUTPUT);
pinMode(D_ONE , OUTPUT);
pinMode(D_TWO , OUTPUT);
pinMode(D_THREE, OUTPUT);
digitalWrite(LT, HIGH);
digitalWrite(BL, HIGH);
digitalWrite(LE, LOW);
digitalWrite(D_ZERO , HIGH);
digitalWrite(D_ONE , LOW);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
delay(1000);
digitalWrite(LT, HIGH);
digitalWrite(BL, HIGH);
digitalWrite(LE, HIGH);
digitalWrite(D_ZERO , LOW);
digitalWrite(D_ONE , HIGH);
digitalWrite(D_TWO , LOW);
digitalWrite(D_THREE , LOW);
}
void loop()
{
}
Output:
Output will be "1". After one second, output will remain "1" independant of the inputs D0-D3.
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ReplyDeleteHi sir...
ReplyDeleteDid u have the full code starting from 0_9 count ..if u have kindly mail me ..
tanveer40501@gmail.com