Arduino Programs

Programs for basic Arduino sketches along with the circuit images.

• Programs are well documented to be self explanatory.
• Pin numbers are mentioned in the code itself for the inputs and outputs.

Basic Arduino functions and their uses

• Serial.begin() - Opens the serial port for data transmission.
• Serial.print() - Prints statements on the Serial monitor. Must use Serial.begin() in setup before using this.
• pinMode() - Sets the given pin component to INPUT, OUTPUT or INPUT_PULLUP.
• digitalRead() - Returns HIGH or LOW based on the component connected to the corresponding pin being ON or OFF respectively.
• digitalWrite() - Sets the value of the connected component on the given pin to HIGH ot LOW as specified.
• analogRead() - Reads the value from the specified analog pin.
• analogWrite() - Writes an analog value (e.g. LED 0-255) to the connected component.
• delay() - Adds a specified millisecond pause to the program. (use delayMicroseconds() for shorter unit duration)
• tone() - Play the specified frequency (used on buzzer or speaker) until noTone() is called.
• pulseIn() - Waits for a HIGH or LOW value on a given pin and returns the duration of pulse.

Libraries used

• pitches - contains common notes used for playing melodies.
• Servo - provides methods to control servo motors.
• Keypad - adds methods for matrix-style keyboards.

Program List

1. RGB Fade - Change RGB LED from red to green to blue in a loop with a delay.
2. LED 1 Button - Turn LED on or off using a button.
3. LED 2 Buttons - Turn LED on or off using two separate buttons.
4. Active Buzzer - Use an active buzzer to play Twinkle, twinkle, little star. Here is a list of other melodies that can be played: Songs for Arduino.
5. Passive Buzzer - Play do re me fa so la ti do using a passive buzzer.
6. Tilt Ball Switch - Turn an LED on or off based on the orientation of the tilt ball switch.
7. Servo Motor - Rotate a servo motor in sweep motion and turn on LEDs depending on the angle.
8. Ultrasonic Sensor - Get an untrasonic sensor to measure distance from an object without using libraries. Many libraries can be found for the same when looking for "HC-SR04".
9. 4x4 Keypad - Register input from a 4x4 keypad using the Keypad library.
10. Analog Joystick - Register coordinates and button press input from an analog joystick.