Make a Digital Display Alarm Clock Using 16*2 LCD and Buzzer Interfacing with REES52 Uno - KT945

INTRODUCTION

In this project, we make a Clock alarm using a push-button and a 16*2 LCD Display with Arduino Uno.

Here 4 push buttons were used where 2 push buttons to increase or decrease the value and other 2 push buttons for ‘set time’ and ‘set alarm’

HARDWARE REQUIRED

• Arduino UNO with USB Cable – 1
• LCD 16*2 – 1
• Potentiometer 10k – 1
• Breadboard 830 Points – 1
• Jumper Wires Male to Male – 20 Piece
• Jumper Wires Male to Female– 20 Piece
• Push Button – 5
• Buzzer B10 – 1
• Single Strand Wire 2m - 1

SOFTWARE REQUIRED

Arduino IDE (programmable software for Arduino)

https://camblick.com/en/Main/Software

PIN DESCRIPTION

16*2 LCD:

10K Potentiometer:

YOU CAN ADJUST THE CONTRAST OF THE LCD BY ROTATING THIS 10K POTENTIOMETER-

Pin	Description
GND	Completes the electrical pathway of power.
OUT	To Adjust the contrast
VCC	Connects to 5v of positive voltage for power

CIRCUIT DIAGRAM

Arduino to 16*2 LCD:

LCD 16*2	Arduino
VSS	Ground
VDD	5v
V0	Data pin of 10k pot (1st pin of pot connected to GND – 2nd pin of pot connected to VCC)
RS	D7
R/W	Ground
E	D6
D4	D5
D5	D4
D6	D3
D7	D2
A	Vcc
K	Ground

Push Button to Arduino:

Push Button 1	Arduino Digital pin 10
Push Button 2	Arduino Digital pin 11
Push Button 3	Arduino Digital pin 13
Push Button 4	Arduino Digital pin 8

Buzzer to Arduino:

Buzzer positive pin	Arduino digital pin 9
Buzzer negative pin	Ground

CODE

Click to see the code or copy the link:

https://camblick.com/LV2jd

WORKING

• PUSH BUTTON 1- Press the button once, and the alarm clock will show on the LCD.
• PUSH BUTTON 2- Press the second button to show the clock time.
• SET TIME- Hold the 3rd push button and press push button 1 to set the hour and push button 2 to set the minute
• ALARM TIME - Hold the 4th push button and press push button 1 to set the hour time and push button 2 for a set minute
• When the time matches the alarm time, the buzzer starts ringing.