Project Hub /Artificial Intelligence & Edge ML/Gesture Recognition/Hand Gesture Based Wireless AC Light Dimmer

Intermediate

ARDUINO

₹1,500 – ₹5,000

3 – 6 Hours

Partial Kit

Hand Gesture Based Wireless AC Light Dimmer

A wireless AC light dimmer controlled by hand gestures using an MPU6050 accelerometer and Arduino.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

Arduino Nano C Type V3 ATMEGA328 with Soldered Headers Rs. 608.00
MPU6050 - Triple Axis Accelerometer + Gyroscope Module Rs. 438.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: 433 MHz RF Pair
9V Battery + Snap
Inductors / Coils / Ferrite

Browse all components

How It Works

The Hand Gesture Based Wireless AC Light Dimmer system is split into two primary sections: a gesture-sensing transmitter and a wireless receiver. On the transmitter side, an Arduino Nano interfaces with an MPU6050 accelerometer sensor via the I2C protocol to detect physical tilting and motion. As the user moves their hand, the accelerometer measures changes in acceleration across its axes, which the Arduino processes using the Adafruit MPU6050 and string libraries. These gesture commands are then packaged and transmitted wirelessly through a 433MHz RF Transmitter Module equipped with an antenna, powered by a 9V battery. On the receiving end, a matching 433MHz RF Receiver Module captures the wireless data packets. The receiver Arduino interprets these signals via the VirtualWire library to modulate control parameters for an AC light dimmer circuit. By translating physical wrist tilts and hand gestures into digital commands sent over radio frequency, the system enables wireless, contactless regulation of an alternating current load without physical buttons or tethered control interfaces.

Why Build This

Develop practical assistive technology solutions for differently-abled individuals using contactless gesture control.

Implement wireless radio frequency communication protocols for remote home automation and appliance regulation.

Integrate inertial measurement sensors with microcontroller platforms to translate physical movement into actionable control signals.

Real-World Application

Assistive technology for differently-abled individuals, contactless home automation, and gesture-controlled lighting or fan speed regulation.

Skills You'll Learn

I2C sensor communication

inertial measurement unit data processing

RF wireless packet transmission

microcontroller firmware development

string manipulation in embedded C++

Safety Precautions

Exercise extreme caution when working with AC mains voltage in the receiver circuit to avoid electrical shock.

Technology Tags

ARDUINO

MPU6050 ACCELEROMETER

433MHZ RF TRANSMITTER

433MHZ RF RECEIVER

WIRELESS COMMUNICATION

GESTURE CONTROL

AC LIGHT DIMMER

I2C

SENSORS

Frequently Asked Questions

How do the transmitter and receiver communicate without line-of-sight?

They use a 433MHz RF Transmitter and Receiver module pair, which transmits radio frequency waves capable of passing through minor obstacles and operating over short distances without requiring a direct line-of-sight.

What libraries are required to make the MPU6050 and RF modules work with the Arduino Nano?

You will need the Adafruit MPU6050 library to interface with the accelerometer and the VirtualWire library to handle the 433MHz RF communication packets, alongside the standard string library.

Can I power both the transmitter and receiver using the 9V battery?

The 9V battery is intended for the portable handheld transmitter circuit containing the Arduino Nano, MPU6050, and RF transmitter. The receiver side typically requires a separate, stable power source appropriate for its logic and relay or dimmer components.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-00341