Add initial exp2: pushbutton LED

exp0-blinking-led/blinking-led.ino → exp1-blinking-led/blinking-led.ino

@@ -26,22 +26,16 @@
  * For more information, please refer to <http://unlicense.org/>
  */
 
-/*
- * The pin # of the LED we are going to use.
- */
+/* The pin # of the LED. */
 #define LED_PIN 13
 
-/*
- * 1-time setup code that runs during initialization.
- */
+/* 1-time setup code that runs during initialization. */
 void setup(void) {
   pinMode(LED_PIN, OUTPUT);
 }
 
-/*
- * Main code, which will run forever.
- */
-void loopvoid() {
+/* Main code, which will run forever. */
+void loop(void) {
 digitalWrite(LED_PIN, HIGH);
 delay(1000);
 digitalWrite(LED_PIN, LOW);

exp0-blinking-led/notes.org → exp1-blinking-led/exp1-notes.org

@@ -1,3 +1,7 @@
+* General notes
+- How much of the code should be given to them? Maybe give them a choice between building off of the previous experiment
+  to try to make the LED controlled by a push button, and just giving them the code?
+
 * Extensions
 - Can you change the PIN in the code and figure out how to still get the LED to blink?
 - Can you make 2 LEDs blink at the same time from a single pin?

exp2-pushbutton-led/exp2-notes.org

@@ -0,0 +1,9 @@
+* General notes
+- Some pushbuttons are a little sticky; if you don't firmly press down on them, they can get stuck on and make you think
+  your circuit or your code is wrong.
+- This exp is basically 2 circuits. Build each in turn, starting with the LED circuit from exp1.
+
+* Extensions
+- Can you make the LED turn on when the button is not pressed?
+- Can you make it take 2 button presses to turn on the LED?
+- Can you make 1 LED turn on when the button is being pressed, and another when it is not pressed?

exp2-pushbutton-led/pushbutton-led.ino

@@ -0,0 +1,53 @@
+/**
+ * @file pushbutton-led.ino
+ *
+ * This is free and unencumbered software released into the public domain.
+ * Anyone is free to copy, modify, publish, use, compile, sell, or
+ * distribute this software, either in source code form or as a compiled
+ * binary, for any purpose, commercial or non-commercial, and by any
+ * means.
+ *
+ * In jurisdictions that recognize copyright laws, the author or authors
+ * of this software dedicate any and all copyright interest in the
+ * software to the public domain. We make this dedication for the benefit
+ * of the public at large and to the detriment of our heirs and
+ * successors. We intend this dedication to be an overt act of
+ * relinquishment in perpetuity of all present and future rights to this
+ * software under copyright law.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * For more information, please refer to <http://unlicense.org/>
+ */
+
+/* The pin # of the pushbutton */
+const int BTN_PIN = 2;
+
+/* The pin # of the LED */
+const int LED_PIN1 = 12;
+const int LED_PIN2 = 8;
+
+/* 1-time setup code that runs during initialization. */
+void setup(void) {
+  pinMode(LED_PIN1, OUTPUT);
+  pinMode(LED_PIN2, OUTPUT);
+  pinMode(BTN_PIN, INPUT);
+}
+
+/* Main code, which will run forever. */
+void loop(void) {
+  int btn_state = digitalRead(BTN_PIN);
+  if (HIGH == btn_state) {
+    digitalWrite(LED_PIN1, HIGH);
+    digitalWrite(LED_PIN2, LOW);
+  } else {
+    digitalWrite(LED_PIN1, LOW);
+    digitalWrite(LED_PIN2, HIGH);
+  }
+}

notes.org

@@ -0,0 +1,12 @@
+* Introduction
+- Should probably walk everyone through the very first blinking LED project, so they see how to use the IDE, program the
+  board, and do a bit of programming. If things go well, this might also be a good idea to do periodically, so if new
+  people come to the classes, they can get a nice intro without feeling lost.
+
+* Construction
+- How much of circuit diagram stuff should I go into? Will it help? Basic stuff like voltage, current, resistance, are
+  necessary at least.
+
+* Safety
+- Don't worry about shorting/breaking stuff. Try not to, but some of that is part of the learning experience.
+- If you aren't sure if something will short out, ask!