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--- arduino:arduino_crash_course:basic_interaction [2015/02/13 22:27] – mithat
+++ arduino:arduino_crash_course:basic_interaction [2017/12/06 01:05] (current) – mithat
@@ Line 9: / Line 9: @@
 In an interrupt scheme, the microcontroller does essentially nothing in its main loop, but it is directed to do something specific when an input source jostles it into action.
-Of the two, polling is probably easier to get started with. You can use both techniques at the same time as well.
+Of the two, polling is probably easier to get started with. We won't learn how to work with interrupts in this section, but it's good to know that you can use both techniques in the same program.
-Following is a simple example of using polling.
+===== Polling example: switch-controlled LED =====
-===== Switch-controlled LED =====
 The following examples use polling to determine the state of a switch. If the switch is pressed, the Arduino will turn an LED on. If it is not pressed, it will turn the LED off.
@@ Line 72: / Line 70: @@
   buttonState = digitalRead(pushButtonPin);  // read the input pin
   digitalWrite(ledPin, buttonState);             // turn the LED on or off
-  //delay(1);        // delay in between reads for stability (?)
+  //delay(1);        // delay between reads for stability (?? I don't remember why this got in here.)
 }
 </file>
@@ Line 96: / Line 94: @@
 void loop() {
   digitalWrite(ledPin, digitalRead(pushButtonPin));  // read the input pin and turn the LED on or off
-  //delay(1);        // delay in between reads for stability (?)
+  //delay(1);        // delay between reads for stability (?? I don't remember why this got in here.)
 }
 </file>