Magic 8 Arduino

A fortune-telling device similar to a Magic 8 Ball

Dec 12, 2017

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3 respects

toys

Components and supplies

Buzzer

Single Turn Potentiometer- 10k ohms

1M Ohm Resistor

Resistor 221 ohm

Arduino UNO

Standard LCD - 16x2 White on Blue

Jumper wires (generic)

Project description

Code

Magic 8 Arduino

c_cpp

Detects knock on piezo buzzer and displays lcd messages

1#include <LiquidCrystal.h>
2
3const int rs = 12, en = 11, d4 = 5,
4  d5 = 4, d6 = 3, d7 = 2;
5LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
6
7const
8  int knockSensor = A0;
9const int threshold = 7;
10
11int sensorReading = 0;
12
13String
14  messages[] = {"Yes", "No", "Try again", "Maybe", "Definitely", "Most
15  likely", "Probably not"};
16
17void setup() {
18  lcd.begin(16,2);
19  lcd.print("Knock
20  to begin!");
21}
22
23void loop() {
24  lcd.setCursor(0, 0);   //column 0,
25  line 0
26  
27  sensorReading = analogRead(knockSensor);
28  
29  if (sensorReading
30  >= threshold) { 
31    for (int i = 0; i < 5 ; i++) { 
32      String randomMessage
33  = messages[random (0, 6)];
34      lcd.clear();
35      lcd.print(randomMessage);
36
37      delay(i*170);
38    }
39    String randomMessage = messages[random (0, 6)];
40
41    lcd.clear();
42    lcd.print(randomMessage);
43  }
44  delay(0);
45  //to
46  avoid overloading Serial Port
47}
48

#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5,
  d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

const
  int knockSensor = A0;
const int threshold = 7;

int sensorReading = 0;

String
  messages[] = {"Yes", "No", "Try again", "Maybe", "Definitely", "Most
  likely", "Probably not"};

void setup() {
  lcd.begin(16,2);
  lcd.print("Knock
  to begin!");
}

void loop() {
  lcd.setCursor(0, 0);   //column 0,
  line 0
  
  sensorReading = analogRead(knockSensor);
  
  if (sensorReading
  >= threshold) { 
    for (int i = 0; i < 5 ; i++) { 
      String randomMessage
  = messages[random (0, 6)];
      lcd.clear();
      lcd.print(randomMessage);

      delay(i*170);
    }
    String randomMessage = messages[random (0, 6)];

    lcd.clear();
    lcd.print(randomMessage);
  }
  delay(0);
  //to
  avoid overloading Serial Port
}

Downloadable files

Magic 8 Arduino

Wiring for Magic 8 Arduino

Magic 8 Arduino

Wiring for Magic 8 Arduino

Magic 8 Arduino

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jsheng

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