Archiving a bunch of old stuff

oldstuff/arduino/msaqsg/ch03/MoreReliableSwitch/Makefile

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+../../../arduino.mk

oldstuff/arduino/msaqsg/ch03/MoreReliableSwitch/MoreReliableSwitch.ino

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+const unsigned int BUTTON_PIN = 7;
+const unsigned int LED_PIN = 13;
+
+int oldButtonState = LOW;
+int ledState = LOW;
+
+void setup() {
+    pinMode(LED_PIN, OUTPUT);
+    pinMode(BUTTON_PIN, INPUT);
+}
+
+void loop() {
+    const int CURRENT_BUTTON_STATE = digitalRead(BUTTON_PIN);
+
+    if (CURRENT_BUTTON_STATE != oldButtonState &&
+            CURRENT_BUTTON_STATE == HIGH) {
+        if (ledState == LOW) {
+            ledState = HIGH;
+        } else {
+            ledState = LOW;
+        }
+
+        digitalWrite(LED_PIN, ledState);
+    }
+
+    oldButtonState = CURRENT_BUTTON_STATE;
+}