# Guess/pick AttinyCard

750

5

Pick attiny card is a random number generator that represents guessing a card in a deck of cards or you could change the setup code to cut a deck of "cards" to see who goes first in a card game.

### Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

## Step 1: Hardware

Attiny85
Arduino as ISP programmer
5v power supply
Shift register LCD

Tactile momentary switch
10kohm resistor

## Step 2: Software

Sketch asks you to pick a card presumably from a deck of 52 cards. Press the button to stop the random sequence. Displays the number randomly picked out of 52 on first line. Card represented on second line.

```#include <LiquidCrystal595.h>
LiquidCrystal595 lcd(0,1,2);

int val;                       //random card value
const int button = 4;                //button pin
int buttonState = 0;

void setup() {
lcd.begin(16,2);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("CHOOSE A CARD");
//lcd.print("CUT ");
lcd.setCursor(0,1);
lcd.print("REMEMBER IT");
//lcd.print("THE DECK");
pinMode(button, INPUT);
delay(5000);
}

void loop() {
val = random(1,52);

if (buttonState == HIGH){
lcd.clear();
lcd.setCursor(6,0);
lcd.print(val);

switch (val) {
case 1:lcd.setCursor(4,1);
lcd.print("ACE S");
break;
case 2:lcd.setCursor(4,1);
lcd.print("2 S");
break;
case 3:lcd.setCursor(4,1);
lcd.print("3 S");
break;
case 4:lcd.setCursor(4,1);
lcd.print("4 S");
break;
case 5:lcd.setCursor(4,1);
lcd.print("5 S");
break;
case 6:lcd.setCursor(4,1);
lcd.print("6 S");
break;
case 7:lcd.setCursor(4,1);
lcd.print("7 S");
break;
case 8:lcd.setCursor(4,1);
lcd.print("8 S");
break;
case 9:lcd.setCursor(4,1);
lcd.print("9 S");
break;
case 10:lcd.setCursor(4,1);
lcd.print("10 S");
break;
case 11:lcd.setCursor(4,1);
lcd.print("JACK S");
break;
case 12:lcd.setCursor(4,1);
lcd.print("QUEEN S");
break;
case 13:lcd.setCursor(4,1);
lcd.print("KING S");
break;
case 14:lcd.setCursor(4,1);
lcd.print("ACE D");
break;
case 15:lcd.setCursor(4,1);
lcd.print("2 D");
break;
case 16:lcd.setCursor(4,1);
lcd.print("3 D");
break;
case 17:lcd.setCursor(4,1);
lcd.print("4 D");
break;
case 18:lcd.setCursor(4,1);
lcd.print("5 D");
break;
case 19:lcd.setCursor(4,1);
lcd.print("6 D");
break;
case 20:lcd.setCursor(4,1);
lcd.print("7 D");
break;
case 21:lcd.setCursor(4,1);
lcd.print("8 D");
break;
case 22:lcd.setCursor(4,1);
lcd.print("9 D");
break;
case 23:lcd.setCursor(4,1);
lcd.print("10 D");
break;
case 24:lcd.setCursor(4,1);
lcd.print("JACK D");
break;
case 25:lcd.setCursor(4,1);
lcd.print("QUEEN D");
break;
case 26:lcd.setCursor(4,1);
lcd.print("KING D");
break;
case 27:lcd.setCursor(4,1);
lcd.print("ACE C");
break;
case 28:lcd.setCursor(4,1);
lcd.print("2 C");
break;
case 29:lcd.setCursor(4,1);
lcd.print("3 CLUB");
break;
case 30:lcd.setCursor(4,1);
lcd.print("4 C");
break;
case 31:lcd.setCursor(4,1);
lcd.print("5 C");
break;
case 32:lcd.setCursor(4,1);
lcd.print("6 C");
break;
case 33:lcd.setCursor(4,1);
lcd.print("7 C");
break;
case 34:lcd.setCursor(4,1);
lcd.print("8 C");
break;
case 35:lcd.setCursor(4,1);
lcd.print("9 C");
break;
case 36:lcd.setCursor(4,1);
lcd.print("10 C");
break;
case 37:lcd.setCursor(4,1);
lcd.print("JACK C");
break;
case 38:lcd.setCursor(4,1);
lcd.print("QUEN C");
break;
case 39:lcd.setCursor(4,1);
lcd.print("KING C");
break;
case 40:lcd.setCursor(4,1);
lcd.print("ACE H");
break;
case 41:lcd.setCursor(4,1);
lcd.print("2 H");
break;
case 42:lcd.setCursor(4,1);
lcd.print("3 H");
break;
case 43:lcd.setCursor(4,1);
lcd.print("4 H");
break;
case 44:lcd.setCursor(4,1);
lcd.print("5 H");
break;
case 45:lcd.setCursor(4,1);
lcd.print("6 H");
break;
case 46:lcd.setCursor(4,1);
lcd.print("7 H");
break;
case 47:lcd.setCursor(4,1);
lcd.print("8 H");
break;
case 48:lcd.setCursor(4,1);
lcd.print("9 H");
break;
case 49:lcd.setCursor(4,1);
lcd.print("10 H");
break;
case 50:lcd.setCursor(4,1);
lcd.print("JACK H");
break;
case 51:lcd.setCursor(4,1);
lcd.print("QUEEN H");
break;
case 52:lcd.setCursor(4,1);
lcd.print("KING H");
break;
}
}
}```

## Step 3: Results

This is my second instructable using my already made 5V power supply, Attiny programmer, and LCD shift register breadboarded circuits. This is a more practical real world use of a microcontroller. Very simple. A momentary button and resistor are connected to one of the pins of the Attiny85. A greeting first displays on the screen for about 5 seconds and then the random number generator starts. Pressing the button stops the random number generator and the selected value and the corresponding card is displayed on the LCD.

Here's a video on Instagram @kayohzee