Wireless Smartphone Charging using Arduino | IOT projects ideas


Abstract

IoT projects ideas play a vital role in building smart and energy-efficient electronic systems. This project presents the design and implementation of a wireless smartphone charging system controlled using an Arduino microcontroller.

The system transfers power wirelessly through inductive coupling between a transmitter coil (charging pad) and a receiver coil placed inside or attached to the smartphone. This eliminates physical connectors and improves user convenience.

A Bluetooth module (HC-05) enables wireless communication between the Arduino and an Android application. The receiver unit monitors the battery percentage and charging status and sends real-time data to the microcontroller through Bluetooth.

Based on the received battery percentage, the system activates LED indicators—red for low charge, yellow for medium, and green for high charge levels. An I2C LCD display continuously shows charging status and battery percentage for better user interaction.

To enhance battery safety and lifespan, a relay module automatically disconnects the power supply when the battery reaches 95% charge, preventing overcharging. This project demonstrates an efficient, safe, and smart wireless charging solution suitable for modern IoT-based applications.

Introduction

Iot projects ideas are increasingly focused on improving user convenience through smart and contactless technologies. Wireless charging uses electromagnetic induction to transfer power between a transmitter coil in a charging pad and a receiver coil embedded within a smartphone. This method eliminates physical connectors, reducing wear, cable damage, and user effort while improving reliability and safety.

This project implements a compact wireless smartphone charging system using inductive transmitter and receiver modules controlled by an Arduino microcontroller. An HC-05 Bluetooth module enables real-time wireless communication between the smartphone and the Arduino, allowing battery percentage and charging status to be continuously monitored.

To enhance user interaction and safety, the system employs LED indicators to show battery levels and an I2C LCD to display charging information in real time. A relay module intelligently disconnects the charging pad once the battery reaches 95%, preventing prolonged overcharging and improving battery lifespan.

By integrating embedded control, wireless power transfer, and mobile application communication, this project transforms a conventional charger into a smart charging station. Such Iot projects ideas demonstrate how affordable hardware and software integration can deliver intelligent, adaptive, and safer charging solutions for modern smartphones.

Objectives

Iot projects ideas emphasize smart automation and user safety in modern electronic systems. The primary objective of this project is to design and implement a functional wireless smartphone charging prototype using an Arduino microcontroller and inductive power transfer.

The system aims to transmit battery percentage and charging status from a smartphone to an Android application and forward this data to the Arduino via Bluetooth (HC-05). Real-time charging information is displayed using an I2C LCD module for better monitoring.

Another objective is to visually indicate battery levels using red, yellow, and green LEDs corresponding to low, medium, and high charge states. The project also focuses on automatically disconnecting the charging supply through a relay when the battery reaches 95%, enhancing battery health. These goals highlight practical Iot projects ideas centered on safety, efficiency, and intelligent control.

Read the full Project : @bestfinalyearprojects

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