NTC Temperature Sensor Reference
An analog temperature sensor based on a negative-temperature-coefficient (NTC) thermistor — resistance drops as temperature rises.
Pin names
| Name | Description |
|---|---|
| GND | Ground |
| VCC | Power (5V) |
| OUT | Analog Out — voltage proportional to temperature |
Attributes
This component has no configurable attributes.
Usage
Connect VCC to 5V, GND to GND, and OUT to an analog input pin. Read the raw
value with analogRead(); converting it to a real temperature requires the thermistor's
Beta coefficient and reference resistance (consult the specific sensor's datasheet).
const int NTC_PIN = A0;
void setup() {
Serial.begin(9600);
}
void loop() {
int raw = analogRead(NTC_PIN);
Serial.print("Raw ADC: ");
Serial.println(raw); // higher raw value = lower temperature (NTC characteristic)
delay(500);
}Examples
| Description | Attrs |
|---|---|
| Default NTC sensor | {} |
See also
- DHT22 — digital temperature + humidity alternative
- Photoresistor — same simple analog output pattern for light instead of heat