Did I Forget Something?” Reminder System

To design a simple smart bag reminder system using an Arduino Nano, OLED display, two buttons, and a buzzer to help the user remember important items such as a book, phone, and keys.

Deshbot shield

Arduino Nano

0.96-inch 128×64 OLED display

2 Push buttons(inbuild)

Buzzer(inbuild)

ComponentArduino Nano

OLED SDA

A4

OLED SCL

A5

OLED VCC

5V

OLED GND

GND

Next Button

D10

Check Button

D12

Buzzer

D11

The system uses two buttons.

Button 1 – NEXT

The button connected to D10 moves between the items.

Button 2 – CHECK

The button connected to D12 marks the selected item as packed.

For example:

After pressing the CHECK button:

The buzzer gives a short beep whenever an item is checked.

OLED Display

The OLED displays the selected item and its status.

Example:

For another item:

Items in the System

The system checks three important items:

1. BOOK
2. PHONE
3. KEYS

Bag Ready Message

When all three items have been marked as packed, the OLED displays:

This tells the user that all the required items have been checked.

The Smart Bag – “Did I Forget Something?” Reminder System is a simple Arduino-based project that helps users check important items before leaving. It demonstrates the use of an OLED display, push buttons, buzzer, arrays, and conditional logic with an Arduino Nano.