Description

Smart Motor Safety and Monitoring System Using Arduino Nano

This project is a smart motor monitoring system using an Arduino Nano that keeps an eye on current, temperature, and vibration in real time. It uses an ACS712 sensor to track current, an LM35 to measure temperature, and a piezo sensor to detect vibrations. Whenever any parameter goes beyond safe limits, the system immediately alerts you with an LED and buzzer, helping prevent motor damage. All components share a common 5V supply and ground, and the motor connects via simple terminal pins, making it modular and easy to test. This compact setup is ideal for ensuring motor safety and monitoring performance efficiently.

Code

C/C++

const int currentPin = A0;
const int tempPin    = A1;
const int vibPin     = 2;
const int ledPin     = 8;
const int buzzerPin  = 9;

const float currentThreshold = 2.0;
const float tempThreshold    = 50.0;
const int vibrationThreshold  = HIGH;

const float ACSSensitivity = 0.185;
const float ACSZeroCurrent = 2.5;

void setup() {
  Serial.begin(9600);
  pinMode(vibPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  digitalWrite(ledPin, LOW);
  digitalWrite(buzzerPin, LOW);
}

void loop() {
  int currentRaw = analogRead(currentPin);
  float currentVoltage = (currentRaw / 1023.0) * 5.0;
  float current = (currentVoltage - ACSZeroCurrent) / ACSSensitivity;

  int tempRaw = analogRead(tempPin);
  float tempVoltage = (tempRaw / 1023.0) * 5.0;
  float temperature = tempVoltage * 100.0;

  int vibration = digitalRead(vibPin);

  bool overCurrent = current > currentThreshold;
  bool overTemp    = temperature > tempThreshold;
  bool vibrated    = vibration == vibrationThreshold;

  if (overCurrent || overTemp || vibrated) {
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);
  }

  Serial.print("Current: "); Serial.print(current); Serial.print(" A, ");
  Serial.print("Temp: "); Serial.print(temperature); Serial.print(" C, ");
  Serial.print("Vibration: "); Serial.println(vibration);

  delay(500);
}

Schematic and Layout

Screenshot 2026-01-03 140203.png

Download Gerbers Download BOM(Bill of materials)

Jan 03,2026

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Smart Motor Safety and Monitoring System Using Arduino Nano

Real Time Motor Monitoring for Current, Temperature, and vibration using Arduino Nano

115

Published: Jan 03,2026

Standard PCB

Download Gerber file 1

BOM(Bill of materials)

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File Last Updated: 2026/01/05 (GMT+8)

File update record

2026-01-0520:56:11

Parts List (BOM) is updated.

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