Arduino 7 Segment Display

This Page is an extension of both the 7 Segment display and the Programming with Functions tasks. It would be of benefit to you to complete both of the prior tasks as the first one will allow you to understand a little more about 7 Segment displays alongside practicing your neat and accurate Prototype Boarding skills whilst the second task will allow you to practice the programming with functions technique which is required for this particular task. It is also hoped that once you have built and tested this board you will be able to modify and test both your program and circuit to able to solve other more complex problems.
The first thing you will need to do is to build the board. You will require the following:1 x Arduino (I have used an Uno but others will do the same job).1 x Prototype Board (breadboard).1 x Seven Segment Display (the one used in this example is a Common Cathode type SC56-11HWA ).1 x Tactile Switch1 x 10K Ohm Fixed Resistor A range of connecting wires (preferably of differing colours with Positive indicated by Red and Negative indicated by Black).
Build the board as shown in Fig 1

Fig 1

Once you have built the board accurately and neatly you will then be required to programme the Arduino to give the correct sequence. Note that pins 3 and 8 of the SC56-11HWA 7 Segment Display are connected to ground - Data Sheet Fig 2 shows which segment of the display is connected to which output pin of the Arduino if you have built it as shown in Fig 1 (There are many other ways to connect the display, feel free to explore with this). Note that I have not connected the Carry Dot.

Fig 2

If you have been practicing your programming techniques and have worked through the examples, You should be able to program the sequences yourself.
Note that I have used the switch layout as done in the previous Switch Example which should make life easier for you. I encourage you to have a go at the programming yourself but if you are struggling a little I have provided a working example shown below:
int switchState = 0;void setup() {  // initialize digital pin LED_BUILTIN as an output.

  pinMode(2, OUTPUT);  pinMode(3, OUTPUT);  pinMode(4, OUTPUT);  pinMode(5, OUTPUT);  pinMode(6, OUTPUT);  pinMode(7, OUTPUT);  pinMode(8, OUTPUT);  pinMode(9, INPUT);   switchState = digitalRead(9);
}
// the loop function runs over and over again forevervoid loop() {
switchState = digitalRead(9);
if (switchState == HIGH){    One();  Two();  Three();  Four ();  Five();  Six();  Seven();  Eight();  Nine();  Zero();   }
else {
  Zero();
  }     }

void Zero()
{  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second
  digitalWrite(2, LOW); // turn the LED off by making the voltage LOW  digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second
  }
  void One()  {
  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second    }
  void Two()
  {   digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  digitalWrite(2, LOW); // turn the LED off by making the voltage LOW  digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }
  void Three()
  {
  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }
  void Four()
  {
  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second
   }
  void Five()
   {
  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second   }
  void Six()
  {
  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  digitalWrite(2, LOW); // turn the LED off by making the voltage LOW  digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }
  void Seven()
  {  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }
  void Eight()
  {  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(3, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(2, LOW); // turn the LED off by making the voltage LOW  digitalWrite(3, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }
  void Nine()
  {  digitalWrite(6, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(8, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)  digitalWrite(4, HIGH); // turn the LED on (HIGH is the voltage level)  delay(250); // wait for a second    digitalWrite(6, LOW); // turn the LED off by making the voltage LOW  digitalWrite(7, LOW); // turn the LED off by making the voltage LOW  digitalWrite(8, LOW); // turn the LED off by making the voltage LOW  digitalWrite(5, LOW); // turn the LED off by making the voltage LOW  digitalWrite(4, LOW); // turn the LED off by making the voltage LOW  delay(250); // wait for a second  }

The program should allow the 7 Segment Display to count up once the switch is pressed.

See if you can modify the program to count up on each switch press.

Could you add a second 7 Segment display to count up to 20?