Fig. 2 shows the circuit diagram of the automatic school bell. It is built around Arduino Uno R3, 16×2 LCD display with I2C (MOD1), DS3231 RTC, 4×4 matrix keypad, 5V SPDT relay, 230V AC call bell, and ...

Display scanned UID lcd.clear(); lcd.setCursor(0 ... This project demonstrates how to build a password-protected door lock system using a digital keypad and Arduino. It provides a step-by-step guide ...

This project implements an electronic safe using an Arduino Uno, an LCD display, a servo motor, and a keypad. The safe can be locked and unlocked using a secret code entered via the keypad.

The display driver (ST7789V2) and touch controller (CST816T) are integrated on-board and rely on SPI and I2C interfaces that make it compatible with popular platforms such as Raspberry Pi, Arduino, ...

At the start, the message is printed on the screen that guides the user to choose the sensor through a keypad. The user has to provide the input at the TestPin and the output is fed into the Arduino.

JC Pro Macro is another one of those compact USB keypads. Powered by an Arduino Pro Micro board, the keypad features five mechanical keyboard keys, and adds a rotary encoder, plus an optional I2C OLED ...

More information about this project is available at: Android Smartphone-Based Function Generator This project is based on the Android app and Arduino ... the user password. The main component in the ...

8x2 LCD display and 4x4 Keypad were connected over an Arduino. This is an Arduino program that verifies if a user entered the correct Pin. There are only 3 attempts after which will have to wait for ...