Update .gitignore, add base sketches

.gitignore

@@ -1 +1 @@
-'libraries'  
+libraries

Sketches/.vscode/arduino.json

@@ -0,0 +1,4 @@
+{
+    "board": "arduino:avr:uno",
+    "port": "COM7"
+}

Sketches/.vscode/c_cpp_properties.json

@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\**",
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.6.21\\**"
+            ],
+            "forcedInclude": [
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.6.21\\cores\\arduino\\Arduino.h"
+            ],
+            "intelliSenseMode": "msvc-x64"
+        }
+    ],
+    "version": 4
+}

Sketches/sketch_sep13a/sketch_sep13a.ino

@@ -0,0 +1,38 @@
+/*
+  Blink
+
+  Turns an LED on for one second, then off for one second, repeatedly.
+
+  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
+  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
+  the correct LED pin independent of which board is used.
+  If you want to know what pin the on-board LED is connected to on your Arduino
+  model, check the Technical Specs of your board at:
+  https://www.arduino.cc/en/Main/Products
+
+  modified 8 May 2014
+  by Scott Fitzgerald
+  modified 2 Sep 2016
+  by Arturo Guadalupi
+  modified 8 Sep 2016
+  by Colby Newman
+
+  This example code is in the public domain.
+
+  http://www.arduino.cc/en/Tutorial/Blink
+*/
+
+// the setup function runs once when you press reset or power the board
+void setup() {
+    // initialize digital pin LED_BUILTIN as an output.
+    pinMode(LED_BUILTIN, OUTPUT);
+}
+
+// the loop function runs over and over again forever
+void loop() {
+    int rnd = random(100, 5000);
+    digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
+    delay(rnd);                       // wait for a second
+    digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
+    delay(rnd);                       // wait for a second
+}

Sketches/sketch_sep20a/.vscode/arduino.json

@@ -0,0 +1,4 @@
+{
+    "port": "COM7",
+    "board": "arduino:avr:uno"
+}

Sketches/sketch_sep20a/.vscode/c_cpp_properties.json

@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\**",
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.6.21\\**"
+            ],
+            "forcedInclude": [
+                "C:\\Users\\Alex\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.6.21\\cores\\arduino\\Arduino.h"
+            ],
+            "intelliSenseMode": "msvc-x64"
+        }
+    ],
+    "version": 4
+}

Sketches/sketch_sep20a/sketch_sep20a.ino

@@ -0,0 +1,45 @@
+/**
+ * Version 1
+ */
+float numOne = 1337;
+float numTwo = 256;
+float numThree = 512;
+float numFour = 1024;
+
+/**
+ * Version 2
+ */
+float myNumbers[4] = {1337, 256, 512, 1024};
+
+void setup() {
+    Serial.begin(9600);
+    // Version 1
+    float sumOne = numOne + numTwo + numThree + numFour;
+    float dividedOne = sumOne / 4;
+
+    Serial.print("Version 1: ");
+    Serial.print(dividedOne);
+    Serial.println();
+
+    // Version 2
+    // Divide length of array by length of a single float byte,
+    // to get the "correct count" (how many single `float`s exist in the array)
+    // of myNumbers in the relevant array.
+    float listLength = sizeof(myNumbers) / sizeof(float);
+    float sumTwo = 0;
+
+    for (int i = 0; i < listLength; i++)
+    {
+        sumTwo = sumTwo + myNumbers[i];
+    }
+
+    float dividedTwo = sumTwo / listLength;
+
+    Serial.print("Version 2: ");
+    Serial.print((dividedTwo));
+    Serial.println();
+
+    Serial.end();
+}
+
+void loop() {}

Sketches/sketch_sep20b/sketch_sep20b.ino

@@ -0,0 +1,23 @@
+void prnt(int largest, int smallest) {
+    Serial.print(largest);
+    Serial.print(" is larger than ");
+    Serial.print(smallest);
+    Serial.println();
+}
+
+void setup() {
+    Serial.begin(9600);
+
+    int numOne = 6812;
+    int numTwo = 3333;
+
+    if (numOne > numTwo) {
+        prnt(numOne, numTwo);
+    } else {
+        prnt(numTwo, numOne);
+    }
+
+    Serial.end();
+}
+
+void loop() {}