This presentation all about Arduino UNO coding and simple explanation about codes and simple work through to start new robotic project

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Understanding Arduino Uno Code(simple coding).pptx

• 1.
  UNDERSTANDINGARDUINO UNO CODELEARNHOW TO READ AND WRITE BASIC ARDUINOPROGRAMS
• 2.
  OBJECTIVES• Understand thestructure of Arduino code• Learn what setup() and loop() do• Use functions like pinMode(), digitalWrite(), and digitalRead()• Build and understand a simple blinking LED circuit• Understand how analog sensors and serial monitor work• Explore the use of piezo buzzers and PWM output• Learn how to properly wire and connect components to ArduinoUno2
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  WHAT IS ARDUINOCODE?•CALLED A "SKETCH"• WRITTEN IN SIMPLIFIED C/C++• TWO MAIN PARTS:VOID SETUP()VOID LOOP()
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  STRUCTURE OF ARDUINOCODEvoid setup() {// Runs once when the Arduino starts}void loop() {// Repeats forever}setup() = initializationloop() = main program4
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  EXAMPLE: BLINKING ANLEDvoid setup() {pinMode(13, OUTPUT);}void loop() {digitalWrite(13, HIGH);delay(1000);digitalWrite(13, LOW);delay(1000);}5
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  CODE EXPLANATION• pinMode(13,OUTPUT) - sets pin 13 to OUTPUT mode• digitalWrite(13, HIGH) - turns LED ON• delay(1000) - waits for 1 second• digitalWrite(13, LOW) - turns LED OFF6
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  COMMON ARDUINO FUNCTIONS7FunctionPurposepinMode() Set pin as input or outputdigitalWrite() Turn pin HIGH or LOWdigitalRead() Read signal from pinanalogRead() Read analog sensor valueanalogWrite() Output PWM signal (0–255)delay() Pause the program
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  PROJECT: BUTTON-CONTROLLED LEDWiringInstructions:• Connect one leg of the button to digital pin 2• Connect the other leg to GND• Add an LED: longer leg (anode) to pin 13, shorter leg (cathode) through a 220Ωresistor to GNDCode:8void setup() {pinMode(2, INPUT_PULLUP);pinMode(13, OUTPUT);}void loop() {int buttonState = digitalRead(2);if (buttonState == LOW) {digitalWrite(13, HIGH);}else {digitalWrite(13, LOW);}}
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  EXPLANATION OF BUTTONCODE• INPUT_PULLUP uses internal resistor• digitalRead(2) reads if button is pressed• LOW = button pressed• digitalWrite(13, HIGH) turns LED ON9
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  ANALOG INPUT: READINGA LIGHTSENSOR (LDR)• Connect one leg of the LDR to 5V• Connect the other leg to analog pin A0• From A0, also connect a 10kΩ resistor to GND• This forms a voltage dividerCode sample:10int ldr = A0;void loop() {int value = analogRead(ldr);Serial.println(value);delay(500);}• Can be used to control brightness, automatic lights, etc.
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  USING SERIAL MONITOR•Serial.begin(9600) starts communication• Serial.print() / Serial.println() sends data toyour PC• Open Serial Monitor in Arduino IDE to seeoutput• Useful for testing and debugging11
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  PLAYING SOUND WITHA PIEZOBUZZERWiring Instructions:• Connect positive leg of the buzzer to pin 8• Connect negative leg to GNDSample Code:12int buzzer = 8;void loop() {tone(buzzer, 262, 500);delay(1000);noTone(buzzer);}• Can add arrays of notes and durations for full songs
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  Using PWM withanalogWrite()Wiring Example (for dimming LED):• Connect LED anode (long leg) to pin 9 (~PWM pin)• Connect cathode (short leg) through 220Ω resistor to GNDSample Code:13analogWrite(9, 128); // 50% brightness• Can dim LEDs or control motor speed
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  PRACTICEQUESTIONS• What doessetup() do?• How is loop() different?• What happens if you removedelay()?• What is the value range ofanalogRead()?• How do you play soundusing a buzzer?• How would you wire an LDRto A0 properly?
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  SUMMARY1.Arduino programs aresimple but powerful2.setup() and loop() are the core of every sketch3.Use digital and analog functions for inputs and outputs4.Serial Monitor helps you test and debug5.You can even add sound and control brightness with PWM6.Proper wiring is important to avoid damage and errors15