Increment and decrement with two push buttons using LCD and arduino Uno

Other Hardware Displays
11

Hi .. i'm a newb

i tried this code ... on my arduino (gift) and it seems to go beyond the "OFF" & "MAX"

how do i make it count from OFF to 5(MAX) ... because this code its prints OFF and MAX on display .. but he goes beyond that with -1 -2 -3 -4 -5 ..and when i press my +button ... i have to go from -2 or how many times i pushed the botton after OFF

and for MAX the same ..goes after my if (buttonPushCounter >= 5)

AND i want to modify this code to control a blinking led ...

something like :
if OFF = closed led
if 1 = 1/min
if 2 = 2/min
if 3 = 3/min
if MAX= 4/min

  • to display this

PS i don't have any coding knowledge sry :stuck_out_tongue: but im triend to learn but i got this 2 days ago ..i i dont want to trow it away because i dont know how this is done
I have browsed the forum for something similar ..cant find anything ...

Aaron_dyer:
Thanks to both of you....I used both of the information given...my code now is shown below...

Its working...I just have to tweak it a little with some delays etc...

#include <LiquidCrystal.h>

LiquidCrystal lcd(7,8,9,10,11,12);

const int buttonPin = 5; // the pin that the Up pushbutton is attached to

const int buttonPin1 = 6; // the pin that the Down pushbutton is attached to

// Variables will change:

int buttonPushCounter = 0; // counter for the number of button presses
int buttonState5 = 0; // current state of the button
int buttonState6 = 0; // current state of the button
int lastButtonState = 0; // previous state of the button

void setup() {

// initialize the button pin as a input:

pinMode(buttonPin, INPUT);

pinMode(buttonPin1, INPUT);

lcd.begin(16,2);

lcd.setCursor(0,1);

lcd.print("Volume:");

}

void loop() {

// read the pushbutton up input pin:

buttonState5 = digitalRead(buttonPin);

// compare the buttonState to its previous state

if (buttonState5 != lastButtonState) {

// if the state has changed, increment the counter

if (buttonState5 == HIGH)

{

buttonPushCounter++;
lcd.setCursor(7,1);

lcd.print(buttonPushCounter);
}

delay(50);

}
// save the current state as the last state,
//for next time through the loop
lastButtonState = buttonState5;

// read the pushbutton down input pin:

buttonState6 = digitalRead(buttonPin1);

// compare the buttonState to its previous state

if (buttonState6 != lastButtonState) {

// if the state has changed, decrement the counter

if (buttonState6 == HIGH)

{

buttonPushCounter-=1;
lcd.setCursor(7,1);

lcd.print(buttonPushCounter);
}

delay(50);

if (buttonPushCounter < 10)

{
lcd.setCursor(8,1);

lcd.print(" ");
}

if (buttonPushCounter <= 0)

{

lcd.setCursor(7,1);

lcd.print("OFF");

}

if (buttonPushCounter >= 25)

{

lcd.setCursor(7,1);

lcd.print("Max");

}

}

// save the current state as the last state,

//for next time through the loop

lastButtonState = buttonState6;

}