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miguel-osunamiguel-osuna
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Added arduino project code
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‎button_and_buzzer/button_and_buzzer.ino

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/*
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Controlling Piezo Buzzer With a Push Button Switch
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This program reproduces a frequency when pressing a push-button
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Piezo Asigned to Pin 13
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Push-button Asigned to Pin 12
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The circuit:
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1 Piezo Buzzer
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1 Push-button
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Created 10/3/19
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By Miguel Osuna
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Modified: -/-/-
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By: -----------
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*/
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const int buttonPin = 7;
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const int buzzerPin = 6;
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int freq;
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void setup()
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{
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// Define the inputs and outputs
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pinMode(buttonPin, INPUT_PULLUP);
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pinMode(buzzerPin, OUTPUT);
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// Begin serial communication
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Serial.begin(9600);
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Serial.println("Please enter a frequency for you buzzer in Hz: ");
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freq = Serial.read();
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}
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void loop()
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{
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// Read the buttons state ('1' for floating value)
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int buttonState = digitalRead(buttonPin);
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// 'LOW' when the button is pressed
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if(buttonState == LOW)
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tone(buzzerPin, freq);
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else
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noTone(buzzerPin);
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}
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‎dc_motor_speed_control/dc_motor_speed_control.ino

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/*
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Motor Speed Control
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This program let's the user control the speed of a motor from the Serial Monitor
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Transitor Base Attached Pin 6 (This controls the motor)
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The circuit:
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1 Power Transistor
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1 DC Motor
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Created 10/3/19
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By Miguel Osuna
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Modified: -/-/-
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By: -----------
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*/
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const int dcMotor = 6;
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void setup()
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{
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// Configure the transistor pin as an output
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pinMode(dcMotor, OUTPUT);
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// Display a message to the user
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Serial.begin(9600);
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Serial.print("Please enter a number between 0 and 9: ");
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}
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void loop()
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{
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char userInput;
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//Check for an input from the user
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if(Serial.available() > 0)
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{
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// The user inputs a character
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userInput = Serial.read();
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if(userInput >= '0' && userInput <= '9')
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{
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int motorSpeed = userInput - '0';
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motorSpeed = map(motorSpeed, 0, 9, 0, 255);
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analogWrite(dcMotor, motorSpeed);
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}
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}
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}
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‎digital_dice_roller/digital_dice_roller.ino

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/*
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Digital Dice Roller
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This program displays a number entered by the user, from 0 to F (15) in hexadecimal on the 7-segment display
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Push-Button Asigned to Pin 1
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7-Segment Display 'a' pin Asigned to Pin 2
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7-Segment Display 'b' pin Asigned to Pin 3
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7-Segment Display 'c' pin Asigned to Pin 4
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7-Segment Display 'd' pin Asigned to Pin 5
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7-Segment Display 'e' pin Asigned to Pin 6
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7-Segment Display 'f' pin Asigned to Pin 7
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7-Segment Display 'g' pin Asigned to Pin 8
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7-Segment Display '.' pin Asigned to Pin 9
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The circuit:
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1 7-Segment Display Common Anode or Common Cathode
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8 Resistors
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1 Push-Button
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Created 11/3/19
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By Miguel Osuna
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Modified: -/-/-
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By: -----------
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*/
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const int buttonPin = 1;
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int sevenSegmentDisplayPins[] = {2, 3, 4, 5, 6, 7, 8};
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// a, b, c, d, e, f, g, .
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byte digits[6][8] =
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{
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{0, 1, 1, 0, 0, 0, 0, 0}, //1
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{1, 1, 0, 1, 1, 0, 1, 0}, //2
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{1, 1, 1, 1, 0, 0, 1, 0}, //3
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{0, 1, 1, 0, 0, 1, 1, 0}, //4
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{1, 0, 1, 1, 0, 1, 1, 0}, //5
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{1, 0, 1, 1, 1, 1, 1, 0}, //6
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};
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byte spinDigits[6][8] =
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{
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{1, 0, 0, 0, 0, 0, 0 ,0},
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{0, 1, 0, 0, 0, 0, 0, 0},
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{0, 0, 1, 0, 0, 0, 0, 0},
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{0, 0, 0, 1, 0, 0, 0, 0},
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{0, 0, 0, 0, 1, 0, 0, 0},
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{0, 0, 0, 0, 0, 1, 0, 0},
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};
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void setup()
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{
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for(int i = 0; i < 8; i++)
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{
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pinMode(sevenSegmentDisplayPins[i], OUTPUT);
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digitalWrite(sevenSegmentDisplayPins[i], LOW);
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}
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pinMode(buttonPin, INPUT_PULLUP);
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}
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void loop()
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{
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// Wait for the push-button to be pressed
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// We espect a LOW, because of the Internal Pull-up resistor
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if(digitalRead(buttonPin) == LOW)
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{
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spin();
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rollDice();
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delay(500);
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}
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}
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void numberToDisplay(int number)
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{
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for(int i = 0; i < 8; i++)
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digitalWrite(sevenSegmentDisplayPins[i], digits[number-1][i]);
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}
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void rollDice()
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{
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numberToDisplay(random(1,7));
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}
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void spin()
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{
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for (int j = 0; j < 6; j++)
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{
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for (int i = 0; i < 8; i++)
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digitalWrite(sevenSegmentDisplayPins[i], spinDigits[j][i]);
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delay(250);
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}
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}

‎four_digit_seven_segment_display/four_digit_seven_segment_display.ino

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/*
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Display Number on 4-digit Seven Segment Display
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This program displays a number entered by the user, from 0000 to 9999 in on the 4-digit 7-segment display
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7-Segment Display 'a' pin (11) Asigned to Pin 2
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7-Segment Display 'b' pin (7) Asigned to Pin 3
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7-Segment Display 'c' pin (4) Asigned to Pin 4
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7-Segment Display 'd' pin (2) Asigned to Pin 5
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7-Segment Display 'e' pin (1) Asigned to Pin 6
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7-Segment Display 'f' pin (10) Asigned to Pin 7
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7-Segment Display 'g' pin (5) Asigned to Pin 8
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7-Segment Display '.' pin (3) Asigned to Pin 9
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Digit 1 Enable pin (12) Asigned to Pin 10
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Digit 2 Enable pin (9) Asigned to Pin 11
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Digit 3 Enable pin (8) Asigned to Pin 12
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Digit 4 Enable pin (6) Asigned to Pin 13
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The circuit:
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1 4-digit 7-Segment Display Common Anode or Common Cathode
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8 Resistors
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Created 22/3/19
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By Miguel Osuna
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Modified: -/-/-
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By: -----------
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*/
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int sevenSegmentDisplayPins[8] = {2, 3, 4, 5, 6, 7, 8, 9};
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int digitPins[4] = {10, 11, 12, 13};
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// a, b, c, d, e, f, g, .
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byte digits[10][8] =
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{
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{1, 1, 1, 1, 1, 1, 0, 0}, //0
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{0, 1, 1, 0, 0, 0, 0, 0}, //1
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{1, 1, 0, 1, 1, 0, 1, 0}, //2
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{1, 1, 1, 1, 0, 0, 1, 0}, //3
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{0, 1, 1, 0, 0, 1, 1, 0}, //4
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{1, 0, 1, 1, 0, 1, 1, 0}, //5
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{1, 0, 1, 1, 1, 1, 1, 0}, //6
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{1, 1, 1, 0, 0, 0, 0, 0}, //7
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{1, 1, 1, 1, 1, 1, 1, 0}, //8
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{1, 1, 1, 0, 0, 1, 1, 0}, //9
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};
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int displayNumbers[4] = {0};
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void setup()
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{
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for(int i = 0; i < 8; i++)
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{
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pinMode(sevenSegmentDisplayPins[i], OUTPUT);
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digitalWrite(sevenSegmentDisplayPins[i], LOW);
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}
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for(int i = 0; i < 4; i++)
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{
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pinMode(digitPins[i], OUTPUT);
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digitalWrite(digitPins[i], LOW);
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}
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Serial.begin(9600);
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Serial.setTimeout(20);
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Serial.print("Please enter a number between 0000 and 9999 (with a 4 digit format): ");
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}
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void loop()
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{
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// Wait for something in the Serial Port
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// Get the input from the user
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static String input;
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if (Serial.available())
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{
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//We read the users input as a string to then separate character by character
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input = Serial.readString();
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Serial.println();
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//Converting numbers to integers
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for(int i = 0; i < 4; i++)
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{
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//Read input string and convert each character to a number to be added to the displayNumbers array
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displayNumbers[i] = input.charAt(i) - '0';
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Serial.print(displayNumbers[i]);
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}
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Serial.println();
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}
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clearDisplay();
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updateDigits(displayNumbers);
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}
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void updateDigits(int displayNumbers[])
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{
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//Because the Display is Common Cathode, we have to set with the opposite State
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//for each digit Pins
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//We set LOW to the output of the First Digit and HIGH to all others
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digitalWrite(digitPins[0], !HIGH);
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digitalWrite(digitPins[1], !LOW);
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digitalWrite(digitPins[2], !LOW);
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digitalWrite(digitPins[3], !LOW);
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numberToDisplay(displayNumbers[0]);
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delay(5);
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//We set LOW to the output of the Second Digit and HIGH to all others
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digitalWrite(digitPins[0], !LOW);
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digitalWrite(digitPins[1], !HIGH);
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digitalWrite(digitPins[2], !LOW);
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digitalWrite(digitPins[3], !LOW);
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numberToDisplay(displayNumbers[1]);
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delay(5);
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//We set LOW to the output of the Third Digit and HIGH to all others
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digitalWrite(digitPins[0], !LOW);
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digitalWrite(digitPins[1], !LOW);
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digitalWrite(digitPins[2], !HIGH);
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digitalWrite(digitPins[3], !LOW);
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numberToDisplay(displayNumbers[2]);
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delay(5);
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//We set LOW to the output of the Fourth Digit and HIGH to all others
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digitalWrite(digitPins[0], !LOW);
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digitalWrite(digitPins[1], !LOW);
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digitalWrite(digitPins[2], !LOW);
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digitalWrite(digitPins[3], !HIGH);
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numberToDisplay(displayNumbers[3]);
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delay(5);
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}
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void numberToDisplay(int number)
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{
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for(int i = 0; i < 8; i++)
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// The display is Common Anode, so we turn on each LED with a HIGH state
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digitalWrite(sevenSegmentDisplayPins[i], digits[number][i]);
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}
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void clearDisplay()
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{
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for(int i = 0; i < 8; i++)
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digitalWrite(sevenSegmentDisplayPins[i], LOW);
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}

‎interrupt_example/interrupt_example.ino

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/*
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Push-Button Interrupt Example
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An interrupt is attached to a push-button so it can be monitored
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Push-button Asigned to Pin 2 (INT-0)
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The circuit:
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1 Push-button
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1 LED
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Created 11/3/19
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By Miguel Osuna
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Modified: -/-/-
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By: -----------
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*/
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const byte buttonPin = 2;
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const byte ledPin = 13;
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volatile byte buttonState = LOW;
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void setup()
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{
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pinMode(buttonPin, INPUT_PULLUP);
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pinMode(ledPin, OUTPUT);
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//digitalWrite(ledPin, LOW);
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// We use the first parameter to indicate the Interrupt Pin
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// The second parameter is the name of the Interrupt Service Routine
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// The third parameter is to activate the interrupt when there is a change from HIGH to LOW and from LOW to HIGH
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attachInterrupt(digitalPinToInterrupt(buttonPin), toggleLed, CHANGE);
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}
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void loop()
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{
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// We toggle the LED by changing the button state with the ISR
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digitalWrite(ledPin, buttonState);
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}
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void toggleLed()
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{
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// Negate the button state
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buttonState = !buttonState;
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}
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