Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Contribute to Nezaemmy/Arduino-Esp32-Projects development by creating an account on GitHub. Skip to content. Navigation Menu Toggle navigation. Sign in Appearance settings. Product GitHub Copilot ...

The code defines the motion sensor and relay pins, setting one as input and the other as output. The loop continuously checks for motion, and when detected, the Arduino Nano signals the relay to turn ...

Write better code with AI Security. Find and fix vulnerabilities ...

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 ...