On branch main

Your branch is up to date with 'origin/main'.
Changes to be committed:
	modified:   README.md
	new file:   examples/SIK_Circuit_1A-Blink/SIK_Circuit_1A-Blink.ino
	new file:   examples/SIK_Circuit_1B-Potentiometer/SIK_Circuit_1B-Potentiometer.ino
	new file:   examples/SIK_Circuit_1C-Photoresistor/SIK_Circuit_1C-Photoresistor.ino
	new file:   examples/SIK_Circuit_1D-RGBNightlight/SIK_Circuit_1D-RGBNightlight.ino
	new file:   examples/SIK_Circuit_2A-Buzzer/SIK_Circuit_2A-Buzzer.ino
	new file:   examples/SIK_Circuit_2B-DigitalTrumpet/SIK_Circuit_2B-DigitalTrumpet.ino
	new file:   examples/SIK_Circuit_2C-SimonSays/SIK_Circuit_2C-SimonSays.ino
	new file:   examples/SIK_Circuit_3A-Servo/SIK_Circuit_3A-Servo.ino
	new file:   examples/SIK_Circuit_3B-DistanceSensor/SIK_Circuit_3B-DistanceSensor.ino
	new file:   examples/SIK_Circuit_3C-MotionAlarm/SIK_Circuit_3C-MotionAlarm.ino
	new file:   examples/SIK_Circuit_4A-LCDHelloWorld/SIK_Circuit_4A-LCDHelloWorld.ino
	new file:   examples/SIK_Circuit_4B-TemperatureSensor/SIK_Circuit_4B-TemperatureSensor.ino
	new file:   examples/SIK_Circuit_4C-DIYWhoAmI/SIK_Circuit_4C-DIYWhoAmI.ino
	new file:   examples/SIK_Circuit_5A-MotorBasics/SIK_Circuit_5A-MotorBasics.ino
	new file:   examples/SIK_Circuit_5B-RemoteControlRobot/SIK_Circuit_5B-RemoteControlRobot.ino
	new file:   examples/SIK_Circuit_5C-AutonomousRobot/SIK_Circuit_5C-AutonomousRobot.ino
	new file:   library.properties
	new file:   src/SIK.h

examples/SIK_Circuit_2A-Buzzer/SIK_Circuit_2A-Buzzer.ino

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+/*
+  SparkFun Inventor’s Kit
+  Circuit 2A - Buzzer
+
+  Play notes using a buzzer connected to pin 10
+
+  This sketch was written by SparkFun Electronics, with lots of help from the Arduino community.
+  This code is completely free for any use.
+
+  View circuit diagram and instructions at: https://learn.sparkfun.com/tutorials/sparkfun-inventors-kit-experiment-guide---v41
+  Download drawings and code at: https://github.com/sparkfun/SIK-Guide-Code
+*/
+
+int speakerPin = 10;               //the pin that buzzer is connected to
+
+void setup()
+{
+  pinMode(speakerPin, OUTPUT);    //set the output pin for the speaker
+}
+
+void loop()
+{
+
+  play('g', 2);       //ha
+  play('g', 1);       //ppy
+  play('a', 4);       //birth
+  play('g', 4);       //day
+  play('C', 4);       //to
+  play('b', 4);       //you
+
+  play(' ', 2);       //pause for 2 beats
+
+  play('g', 2);       //ha
+  play('g', 1);       //ppy
+  play('a', 4);       //birth
+  play('g', 4);       //day
+  play('D', 4);       //to
+  play('C', 4);       //you
+
+  play(' ', 2);       //pause for 2 beats
+
+  play('g', 2);       //ha
+  play('g', 1);       //ppy
+  play('G', 4);       //birth
+  play('E', 4);       //day
+  play('C', 4);       //dear
+  play('b', 4);       //your
+  play('a', 6);       //name
+
+  play(' ', 2);       //pause for 2 beats
+
+  play('F', 2);       //ha
+  play('F', 1);       //ppy
+  play('E', 4);       //birth
+  play('C', 4);       //day
+  play('D', 4);       //to
+  play('C', 6);       //you
+
+  while (true) {}     //get stuck in this loop forever so that the song only plays once
+}
+
+
+void play( char note, int beats)
+{
+  int numNotes = 14;  // number of notes in our note and frequency array (there are 15 values, but arrays start at 0)
+
+  //Note: these notes are C major (there are no sharps or flats)
+
+  //this array is used to look up the notes
+  char notes[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C', 'D', 'E', 'F', 'G', 'A', 'B', ' '};
+  //this array matches frequencies with each letter (e.g. the 4th note is 'f', the 4th frequency is 175)
+  int frequencies[] = {131, 147, 165, 175, 196, 220, 247, 262, 294, 330, 349, 392, 440, 494, 0};
+
+  int currentFrequency = 0;    //the frequency that we find when we look up a frequency in the arrays
+  int beatLength = 150;   //the length of one beat (changing this will speed up or slow down the tempo of the song)
+
+  //look up the frequency that corresponds to the note
+  for (int i = 0; i < numNotes; i++)  // check each value in notes from 0 to 14
+  {
+    if (notes[i] == note)             // does the letter passed to the play function match the letter in the array?
+    {
+      currentFrequency = frequencies[i];   // Yes! Set the current frequency to match that note
+    }
+  }
+
+  //play the frequency that matched our letter for the number of beats passed to the play function
+  tone(speakerPin, currentFrequency, beats * beatLength);
+  delay(beats * beatLength);  //wait for the length of the tone so that it has time to play
+  delay(50);                  //a little delay between the notes makes the song sound more natural
+
+}
+
+/* CHART OF FREQUENCIES FOR NOTES IN C MAJOR
+  Note      Frequency (Hz)
+  c        131
+  d        147
+  e        165
+  f        175
+  g        196
+  a        220
+  b        247
+  C        262
+  D        294
+  E        330
+  F        349
+  G        392
+  A        440
+  B        494
+*/