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The LM35, LM335, and LM34 are analog temperature sensors that can be interfaced with an Arduino to measure temperature. Here's a basic guide on how to connect and use each of these sensors:
Applications:
- Home automation
- Weather monitoring
- Industrial temperature control
- Various DIY electronic projects requiring temperature sensing
LM35 Temperature Sensor:
Components Needed:
1. Arduino board (e.g., Arduino Uno)
2. LM35 temperature sensor
3. Breadboard and jumper wires
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Wiring:
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- Connect the LM35 as follows:
- Connect the LM35 VCC pin to 5V on Arduino.
- Connect the LM35 GND pin to GND on Arduino.
- Connect the LM35 OUT pin to an analog pin on Arduino (e.g., A0).
Arduino Code lm35 :
const int lm35Pin = A0;
void setup() {
Serial.begin(9600);
}
void loop() {
// Read the analog value from LM35
int sensorValue = analogRead(lm35Pin);
// Convert the analog value to temperature in Celsius
float temperatureC = (sensorValue * 5.0 / 1024.0) * 100.0;
// Print the temperature to the serial monitor
Serial.print("LM35 Temperature: ");
Serial.print(temperatureC);
Serial.println(" °C");
delay(1000); // Wait for 1 second before the next reading
}
LM335 Temperature Sensor:
Components Needed:
1. Arduino board (e.g., Arduino Uno)
2. LM335 temperature sensor
3. Breadboard and jumper wires
Wiring:
- Connect the LM335 as follows:
- Connect the LM335 VCC pin to 5V on Arduino.
- Connect the LM335 GND pin to GND on Arduino.
- Connect the LM335 OUT pin to an analog pin on Arduino (e.g., A0).
Arduino Code lm335 :
const int lm335Pin = A0;
void setup() {
Serial.begin(9600);
}
void loop() {
// Read the analog value from LM335
int sensorValue = analogRead(lm335Pin);
// Convert the analog value to temperature in Celsius
float temperatureC = (sensorValue * 5.0 / 1024.0 - 0.5) * 100.0;
// Print the temperature to the serial monitor
Serial.print("LM335 Temperature: ");
Serial.print(temperatureC);
Serial.println(" °C");
delay(1000); // Wait for 1 second before the next reading
}
LM34 Temperature Sensor:
The LM34 is similar to the LM35, but it provides temperature readings in Fahrenheit.
Components Needed:
1. Arduino board (e.g., Arduino Uno)
2. LM34 temperature sensor
3. Breadboard and jumper wires
Wiring:
- Connect the LM34 as follows:
- Connect the LM34 VCC pin to 5V on Arduino.
- Connect the LM34 GND pin to GND on Arduino.
- Connect the LM34 OUT pin to an analog pin on Arduino (e.g., A0).
Arduino Code lm34 :
const int lm34Pin = A0;
void setup() {
Serial.begin(9600);
}
void loop() {
// Read the analog value from LM34
int sensorValue = analogRead(lm34Pin);
// Convert the analog value to temperature in Fahrenheit
float temperatureF = (sensorValue * 5.0 / 1024.0) * 100.0;
// Print the temperature to the serial monitor
Serial.print("LM34 Temperature: ");
Serial.print(temperatureF);
Serial.println(" °F");
delay(1000); // Wait for 1 second before the next reading
}
Adjust the analog pin (e.g., A0) in the code to match your actual wiring configuration. These examples provide a basic setup for reading temperature from these sensors using Arduino. Depending on your project, you may need to calibrate the sensors or incorporate additional features into your code.
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