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- #line 1 "p11_CrystalBall.ino"
- /*
- Arduino Starter Kit example
- Project 11 - Crystal Ball
- This sketch is written to accompany Project 11 in the
- Arduino Starter Kit
- Parts required:
- 220 ohm resistor
- 10 kilohm resistor
- 10 kilohm potentiometer
- 16x2 LCD screen
- tilt switch
- Created 13 September 2012
- by Scott Fitzgerald
- http://arduino.cc/starterKit
- This example code is part of the public domain
- */
- // include the library code:
- #include <Liquid.h>
- // initialize the library with the numbers of the interface pins
- #include "Arduino.h"
- void setup();
- void loop();
- #line 29
- LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
- // set up a constant for the tilt switchPin
- const int switchPin = 6;
- // variable to hold the value of the switchPin
- int switchState = 0;
- // variable to hold previous value of the switchpin
- int prevSwitchState = 0;
- // a variable to choose which reply from the crystal ball
- int reply;
- void setup() {
- // set up the number of columns and rows on the LCD
- lcd.begin(16, 2);
- // set up the switch pin as an input
- pinMode(switchPin,INPUT);
- // Print a message to the LCD.
- lcd.print("Ask the");
- // set the cursor to column 0, line 1
- // line 1 is the second row, since counting begins with 0
- lcd.setCursor(0, 1);
- // print to the second line
- lcd.print("Crystal Ball!");
- }
- void loop() {
- // check the status of the switch
- switchState = digitalRead(switchPin);
- // compare the switchState to its previous state
- if (switchState != prevSwitchState) {
- // if the state has changed from HIGH to LOW
- // you know that the ball has been tilted from
- // one direction to the other
- if (switchState == LOW) {
- // randomly chose a reply
- reply = random(8);
- // clean up the screen before printing a new reply
- lcd.clear();
- // set the cursor to column 0, line 0
- lcd.setCursor(0, 0);
- // print some text
- lcd.print("the ball says:");
- // move the cursor to the second line
- lcd.setCursor(0, 1);
- // choose a saying to print baed on the value in reply
- switch(reply){
- case 0:
- lcd.print("Yes");
- break;
- case 1:
- lcd.print("Most likely");
- break;
- case 2:
- lcd.print("Certainly");
- break;
- case 3:
- lcd.print("Outlook good");
- break;
- case 4:
- lcd.print("Unsure");
- break;
- case 5:
- lcd.print("Ask again");
- break;
- case 6:
- lcd.print("Doubtful");
- break;
- case 7:
- lcd.print("No");
- break;
- }
- }
- }
- // save the current switch state as the last state
- prevSwitchState = switchState;
- }
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