Im making this project for me to learn on my own.
Its a timeout box for your phone during study sessions.
But the LCD is not working as intended but when i put it together and coded it in tinkercad first it all worked fine
Im trying to no have as much big
parts in this project so instead of using a potentiometer im using a resistor( 1.2 kΩ) for a more simple build.
Image of the circuit:
image of wiring on tinkercad:
This wiring is also just the lcd with the other components removed
full code (contains the code for the other components) :
#include<LiquidCrystal.h>
#include <Servo.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
Servo servo_A0;
int time = 1; // Default time is 1
const int buttonPinUp = 10; // Button to add time
const int buttonPinDown = 9; // Button to minus time
const int buttonStart = 8; // Button to start timer
int buttonStateUp = LOW; // Default state of add button
int buttonStateDown = LOW; // Default state of minus button
int buttonStartState = LOW; // Default state of start button
const int Red = A1; // Pin for red led
const int Green = A2; // Pin for green led
const int maxTime = 60; // Max time set
bool timerRunning = false; // Flag to check if the timer is running
// Array to store display messages
const char* displayMessages[] = {
" Lockdown!", // Message for line 1
"Time: ", // Prefix for line 2
"s", // Second indicator
" " // Space for alignment
};
// function for adding time
void increaseTime() {
if (time < maxTime) {
time = time + 1;
}
}
// function for deducting time
void decreaseTime() {
if (time > 1) {
time = time - 1;
}
}
void setup()
{
lcd.begin(16, 2); // Activate the LCD
pinMode(buttonPinUp, INPUT); //receive input from add button
pinMode(buttonPinDown, INPUT); //receive input from minus button
pinMode(buttonStart, INPUT); //receive input from start
pinMode(Red, OUTPUT); //send output to red led
pinMode(Green, OUTPUT); //send output to green led
// servo set to 90 degrees
servo_A0.attach(A0, 500, 2500);
servo_A0.write(90);
}
void loop()
{
// LCD timer menu // timerRunning == false as !timerRunning
if (!timerRunning) { // if timerRunning is false then LCD menu is activated
digitalWrite(Red, LOW);
digitalWrite(Green, HIGH);
lcd.setCursor(0, 0);
lcd.print(displayMessages[0]); // array for message
lcd.setCursor(4, 1);
lcd.print(displayMessages[1]); // array for prefix
lcd.print(time);
if (time < 10) {
lcd.setCursor(11, 1);
lcd.print(displayMessages[2]); // array for "s"
lcd.setCursor(12, 1);
lcd.print(displayMessages[3]); // array for space
}
if (time > 9) {
lcd.setCursor(12, 1);
lcd.print(displayMessages[2]); // array for "s"
}
// When button add is pressed
buttonStateUp = digitalRead(buttonPinUp);
if (buttonStateUp == HIGH) {
increaseTime();
delay(200); // Process time
}
// When button minus is pressed
buttonStateDown = digitalRead(buttonPinDown);
if (buttonStateDown == HIGH) {
decreaseTime();
delay(200); // Process time
}
}
// When start button is pressed
buttonStartState = digitalRead(buttonStart);
if (buttonStartState == HIGH && !timerRunning) {
lcd.clear(); // Clear the LCD
servo_A0.write(0); // Lock the box
digitalWrite(Red, HIGH);
digitalWrite(Green, LOW);
timerRunning = true; // Start timer
delay(200); // Process time
// Countdown timer
for (int i = time; i >= 0; i--) {
lcd.setCursor(0, 0);
lcd.print("Time Remaining:");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(4, 1);
lcd.print(i);
lcd.print(" seconds");
delay(1000);
}
// Timer has finished
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Timer Complete!");
servo_A0.write(90);
digitalWrite(Red, LOW);
digitalWrite(Green, HIGH);
delay(1700);
lcd.setCursor(0, 0);
lcd.print(" ");
timerRunning = false; // timer is off
}
}
image of the full circuit:
I would like to know how to fix this and the mistake i made at this moment.
