Project Hub /Audio Displays & Interactive Media/LED Matrix & Cube Displays/Smart Liquid Mosquito Repellents Timer

Beginner

ARDUINO

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Smart Liquid Mosquito Repellents Timer

A smart timer for electronic liquid mosquito repellents that regulates on/off cycles to prevent excessive vapor buildup and enhance home safety.

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 UNO R3 Board (Compatible) – ATmega328P Microcontroller with USB Cable Rs. 999.00
5V 1 Channel Relay Module Rs. 45.00
10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Piezo Buzzer (Big) 6-12V Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: RTC Module DS3231 / DS1307
Microcontroller IC (DIP) / Chip

Browse all components

How It Works

The Smart Liquid Mosquito Repellents Timer is controlled by an Arduino Uno board, which coordinates timekeeping, user inputs, and output actuation. Time tracking is handled by the DS1307 RTC module, allowing the system to monitor real-world hours and minutes continuously. Users can interact with the system using four on/off switches connected with 10-kilo-ohm resistors for stable digital input readings. When the programmed schedule dictates that the repellent should operate, the Arduino sends a control signal to a one-channel 5V relay module. The relay acts as an electrically isolated switch that opens and closes the connection to a 220V AC 6A electrical socket, thereby powering the plugged-in liquid mosquito repellent device on or off. Additionally, a 5V buzzer provides audible feedback or alerts based on system states. The entire circuit is powered externally by a 12V DC adaptor, providing stable operating voltage for the Arduino and connected peripheral modules while managing high-voltage AC safely through the relay boundary.

Why Build This

Automate domestic or office pest control devices to eliminate continuous chemical exposure and optimize indoor air quality.

Gain practical undergraduate-level experience interfacing low-voltage microcontroller logic with high-voltage 220V AC electrical loads safely.

Implement time-based automation loops using real-time clock modules and custom switch inputs for appliance management.

Real-World Application

Automating household and office mosquito repellent devices to prevent continuous chemical exposure while maintaining a pest-free environment.

Skills You'll Learn

Real-time clock integration

I2C communication

relay control of AC mains

digital input debouncing with pull-down resistors

microcontroller scheduling

Safety Precautions

Exercise caution when interfacing the relay module with 220V AC mains voltage to avoid electrical shock.

Technology Tags

ARDUINO

REAL-TIME CLOCK

DS1307 RTC

RELAY MODULE

HOME AUTOMATION

TIMING CONTROL

Frequently Asked Questions

Can I connect the 220V AC appliance directly to the Arduino board?

No, never connect high-voltage AC mains directly to an Arduino. The Arduino controls a low-voltage relay module, which physically isolates the low-power logic circuit from the 220V AC electrical socket.

What is the purpose of the 10-kilo-ohm resistors in this circuit?

The resistors function as pull-down resistors for the on/off switches to ensure that the digital input pins on the Arduino read a stable, defined LOW state when the switches are open.

How does the system keep track of the correct time when powered off?

The DS1307 RTC module typically includes a backup coin cell battery slot, allowing the internal clock to maintain time even when the main 12V DC power adaptor is disconnected.

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.

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