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Reading a Temperature Sensor — SIK Circuit 7
Ed

Oluşturan

Ed

17. Mart 2026FI
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Reading a Temperature Sensor — SIK Circuit 7

Read temperature from a TMP36 sensor and display Celsius and Fahrenheit readings on the Serial Monitor. Your introduction to serial communication and real-world data.

Talimatlar

1

Parts & Introduction

The TMP36 is an analog temperature sensor that outputs a voltage proportional to temperature. You'll learn to use the Serial Monitor to display real-time readings — an essential debugging tool.

Parts Needed

  • 1x Arduino Uno + USB cable
  • 1x Breadboard
  • 1x TMP36 Temperature Sensor
  • 5x Jumper Wires

Warning: The TMP36 looks similar to the transistor. Look for "TMP" in tiny letters and a triangle logo. The transistor has "222" printed on it. Inserting the wrong component can damage it!

Bu adım için malzemeler:

SparkFun Inventors Kit - V3.2SparkFun Inventors Kit - V3.21 kit
Arduino Uno R31 adet
Breadboard1 adet
TMP36 Temperature Sensor1 adet
Jumper WiresJumper Wires3 adet

Gerekli aletler:

Computer with Arduino IDE
2

Hardware Hookup

Wiring Instructions

With the TMP36 flat side facing you and pins pointing down, the pins are (left to right): 5V, Signal, GND.

  1. Connect the left pin to 5V.
  2. Connect the middle pin (signal) to Analog Pin A0.
  3. Connect the right pin to GND.

That's it — just 3 wires! The TMP36 can only be connected in one direction. Double-check before powering on.

Bu adım için malzemeler:

TMP36 Temperature Sensor1 adet
Breadboard1 adet
Jumper WiresJumper Wires3 adet
3

Arduino Code

Open the Arduino IDE and upload the following sketch to your Arduino board.

temperature_sensor.inoarduino
/*
SparkFun Inventor's Kit
Example sketch 07 — TEMPERATURE SENSOR

Use the serial monitor to read temperature from a TMP36 sensor.

Hardware connections:
  TMP36 (flat side, pins down, left to right): 5V, SIGNAL, GND
  Connect 5V pin to 5V, SIGNAL pin to analog pin 0, GND pin to GND.

This code is completely free for any use.
*/

const int temperaturePin = 0;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  float voltage, degreesC, degreesF;

  voltage = getVoltage(temperaturePin);

  degreesC = (voltage - 0.5) * 100.0;
  degreesF = degreesC * (9.0/5.0) + 32.0;

  Serial.print("voltage: ");
  Serial.print(voltage);
  Serial.print("  deg C: ");
  Serial.print(degreesC);
  Serial.print("  deg F: ");
  Serial.println(degreesF);

  delay(1000);
}

float getVoltage(int pin)
{
  return (analogRead(pin) * 0.004882814);
  // Converts 0-1023 to 0.0-5.0 volts
}

Bu adım için malzemeler:

Arduino Uno R31 adet

Gerekli aletler:

Computer with Arduino IDE
4

Test & Experiment

What You Should See

Open the Serial Monitor (magnifying glass icon in Arduino IDE, or Ctrl+Shift+M). You'll see lines updating once per second:

voltage: 0.73  deg C: 23.24  deg F: 73.84

Troubleshooting

  • Nothing happens: Open the Serial Monitor! The output goes there, not to the LEDs.
  • Gibberish text: Set the Serial Monitor baud rate dropdown to 9600.
  • Temperature unchanged: Pinch the sensor with your fingers to warm it up, or apply ice to cool it down.

Experiments to Try

  • Add an LED that turns on above a temperature threshold (like a heat warning).
  • Log data over time to see temperature trends.
  • Combine with the LCD (Circuit 15) to display temperature without a computer.

Malzemeler

5

Gerekli Aletler

1
  • 13
    Computer with Arduino IDE
Tahmini toplam
$130.00

CC0 Kamu Malı

Bu plan CC0 lisansıyla yayınlanmıştır. İzin almadan kopyalayabilir, değiştirebilir, dağıtabilir ve herhangi bir amaçla kullanabilirsiniz.

Planı üzerinden ürün satın alarak Maker'ı destekleyin, böylece Maker Komisyonu Satıcılar tarafından belirlenen komisyonu kazanırlar veya bu Planın yeni bir versiyonunu oluşturun ve gelir paylaşımı için kendi Planınıza bağlantı olarak ekleyin.

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