Arduino uno Flow Sensor

This project demonstrates how to measure the flow rate and total volume of liquid using a flow sensor with an Arduino UNO. The sensor reads the flow rate in liters per second and calculates the total volume of liquid passed through the sensor.

Components Needed

Block Diagram

Hardware Wiring Explanation:

Connect the VCC pin of the flow sensor to the 5V pin on the Arduino.

Connect the GND pin of the flow sensor to the GND pin on the Arduino.

Connect the signal output pin of the flow sensor to digital pin 2 on the Arduino.

Assemble the circuit according to the wiring instructions.

Ensure all connections are secure and components are correctly placed on the breadboard.

Software (Arduino IDE):

Copy and paste the provided code into the Arduino IDE.

Verify and upload the code to your Arduino board.

Code Explanation

Variables and Initialization:

The code defines variables to store the flow frequency (

The flow sensor is connected to digital pin 2 (

An interrupt is attached to count pulses from the sensor.

Setup Function:

Initializes the sensor pin as an input and enables the internal pull-up resistor.

Begins serial communication at a baud rate of 9600.

Attaches an interrupt to the sensor pin to count rising pulses.

Prints an initial message to the Serial Monitor.

Loop Function:

Calculates the flow rate and total volume every second.

If there is flow detected, the flow rate is calculated in liters per second, and the total volume is updated and printed to the Serial Monitor.

If no flow is detected, it prints a message indicating a flow rate of 0 L/Sec.

Monitor the Output

Open the Serial Monitor in the Arduino IDE.

The measured flow rate and total volume will be printed in liters per second (L/Sec) and liters (L), respectively, with updates every second.

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