Project Hub /Basic Analog & Power Electronics/Sequential, Timing & Pulse Circuits/A Smart Whistle Counter For Cooking And More

Intermediate

ARDUINO

₹1,500 – ₹5,000

3 – 6 Hours

Partial Kit

A Smart Whistle Counter For Cooking And More

This article describes a smart electronic counter that counts pressure-cooker whistles and cooking time duration, triggering a buzzer alarm when presets are reached.

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.

Microphone module - Analog Sound Sensor Module for Arduino Rs. 63.00
0.96 Inch I2C/IIC 4pin OLED Display Module White Rs. 349.00
Piezo Buzzer (Big) 6-12V Rs. 45.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
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 Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Arduino Mega
Keypad (Matrix)
9V Battery + Snap

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How It Works

The Smart Whistle Counter system centers around the Arduino Mega 2560 microcontroller, which coordinates input from an LM393 sound sensor module and a 4x4 keypad, while driving a 23mm OLED 128x32 display and an MH-FMD active alarm buzzer. Power is supplied by a 9V battery controlled via an On/Off switch S1. As audio signals are captured by the LM393 sound sensor, the analog or digital acoustic spikes generated by pressure cooker whistles or valve releases are fed into the Arduino Mega 2560. The microcontroller runs software utilizing a moving window low-pass filter algorithm implemented in the Arduino IDE to isolate genuine whistle transients from background noise and transient room sounds. Users interact with the system via the 4x4 keypad to set target preset counts and cooking duration thresholds. Throughout the cooking process, the 23mm OLED 128x32 display provides real-time visual feedback, showing the current whistle count and elapsed time. Once the software algorithms determine that the programmed target count or duration has been precisely met, the Arduino Mega 2560 triggers the MH-FMD active alarm buzzer to alert the user that the cooking cycle or boiling point threshold is complete.

Why Build This

Automate kitchen cooking cycles by digitally counting pressure-cooker whistles to prevent over-boiling.

Implement industrial monitoring concepts by detecting characteristic acoustic signatures from boiler pressure release valves.

Gain practical undergraduate-level experience integrating audio sensing, digital displays, and user input matrices into a cohesive embedded system.

Real-World Application

Can be used in kitchens for automated cooking or in factories with boilers having pressure release valves to automatically turn them off on hearing the sound at boiling point.

Skills You'll Learn

Acoustic signal processing

moving window filter implementation

digital threshold detection

I2C or SPI display interfacing

matrix keypad scanning

microcontroller GPIO management

Safety Precautions

No specific precautions noted for this build — always follow general electronics safety practices.

Technology Tags

ARDUINO

SOUND SENSOR

LM393

OLED DISPLAY

KEYPAD

BUZZER

C PROGRAMMING

SIGNAL PROCESSING

LOW-PASS FILTER

Frequently Asked Questions

Why is a moving window low-pass filter algorithm required for the sound sensor?

Kitchens and industrial environments contain diverse background noises; the low-pass filter algorithm processes the audio stream from the LM393 module to filter out high-frequency noise and accurately isolate distinct whistle events.

How does the Arduino Mega 2560 communicate with the OLED display and keypad?

The Arduino Mega 2560 uses its extensive General Purpose Input/Output (GPIO) pins and standard communication protocols (such as I2C for the 23mm OLED display) to drive the screen and continuously scan the rows and columns of the 4x4 keypad.

Can a standard 9V battery power this system for long periods?

A 9V battery is suitable for prototyping and moderate testing sessions, but for prolonged continuous deployment in kitchen or industrial settings, an external regulated DC power supply is recommended to avoid frequent battery replacements.

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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