20K Cermet(Pack of 5) Documentation

Operating Temperature Range

-40C to 125C

Storage Temperature Range

-40C to 150C

Thermal Time Constant

<10 seconds

Power Rating

50 mW (maximum)

Applications

The 20K Cermet Thermistor is suitable for various IoT applications, including

Temperature monitoring and control in industrial automation

Medical devices, such as thermometers and patient monitoring systems

HVAC systems, including temperature control and air quality monitoring

Wearables, such as smartwatches and fitness trackers

Smart home devices, including thermostats and temperature sensors

Automotive systems, including engine temperature monitoring and climate control

Packaging and Order Information

This pack of 5 thermistors is supplied in a sealed package, complete with a datasheet and application notes. Order code

[Insert order code].

Important Notes

Handle the thermistors with care to avoid mechanical stress and damage.

Ensure proper thermal coupling to the target surface for accurate temperature measurement.

Consult the datasheet and application notes for detailed information on usage, calibration, and integration.

By integrating the 20K Cermet Thermistor into your IoT project, you can achieve accurate and reliable temperature measurement, enabling your device to make informed decisions and respond to its environment.

Pin Configuration

Component Documentation: 20K Cermet (Pack of 5)
Overview
The 20K Cermet is a thermistor, a type of temperature-sensing component, commonly used in IoT applications. This pack of 5 Cermet thermistors features a resistance of 20 kilohms at 25C, making them suitable for various temperature measurement and control applications.
Pinout Description
The 20K Cermet thermistor has two pins, which are:
Pin 1:
Function: Positive leg
Description: This pin is the positive terminal of the thermistor. It is typically connected to the positive voltage supply or a pull-up resistor.
Pin 2:
Function: Negative leg
Description: This pin is the negative terminal of the thermistor. It is typically connected to the negative voltage supply or a pull-down resistor.
Connecting the Pins (Step-by-Step Guide)
To connect the 20K Cermet thermistor, follow these steps:
Step 1: Identify the pins
Locate the two pins on the thermistor, Pin 1 (positive leg) and Pin 2 (negative leg).
Step 2: Connect the positive leg (Pin 1)
Connect Pin 1 to the positive voltage supply (VCC) or a pull-up resistor (RPU).
Ensure a stable voltage supply is provided to the thermistor.
Step 3: Connect the negative leg (Pin 2)
Connect Pin 2 to the negative voltage supply (GND) or a pull-down resistor (RPD).
Ensure a stable ground connection is provided to the thermistor.
Step 4: Add a voltage divider (optional)
If you want to measure the thermistor's resistance using an analog-to-digital converter (ADC), connect a voltage divider circuit between the thermistor and the ADC input.
The voltage divider consists of two resistors, R1 and R2, connected in series with the thermistor.
Example Connection Diagram
Here's an example connection diagram for the 20K Cermet thermistor:
```
+--------+
| |
| VCC |
| |
+--------+
|
|
v
+---------------+ +---------------+
| | | |
| 20K Cermet | | RPU (1k) |
| Thermistor | | |
+---------------+ +---------------+
|
|
v
+--------+
| |
| GND |
| |
+--------+
```
In this example, the 20K Cermet thermistor is connected to a 1 k pull-up resistor (RPU) and a negative voltage supply (GND).
By following these steps and considering the specific requirements of your IoT project, you can successfully connect and utilize the 20K Cermet thermistor to measure temperature accurately.

Code Examples

Component Documentation: 20K Cermet (Pack of 5)

Overview

The 20K Cermet (Pack of 5) is a set of five ceramic metal (Cermet) resistors with a resistance value of 20 kilohms. These resistors are suitable for a wide range of applications, including IoT projects, robotics, and electronic circuits.

Technical Specifications

Resistance Value: 20 kilohms (20K ohms)
 Power Rating: 1/4 watt
 Material: Cermet (Ceramic Metal)
 Tolerance: 1%
 Operating Temperature: -55C to +155C
 Package: Pack of 5

Code Examples

### Example 1: Using 20K Cermet in a Simple Voltage Divider Circuit with an Arduino

In this example, we will use the 20K Cermet resistor to create a simple voltage divider circuit to measure the voltage of a 9V battery using an Arduino.

```c
const int voltagePin = A0;  // Analog input pin for voltage measurement
const int cermetResistor = 20000;  // 20K ohm Cermet resistor

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

void loop() {
  int sensorValue = analogRead(voltagePin);
  float voltage = (sensorValue  5.0) / 1024.0;
  float dividerVoltage = (voltage  cermetResistor) / (cermetResistor + 10000);  // Calculate voltage using voltage divider formula
  Serial.print("Voltage: ");
  Serial.print(dividerVoltage);
  Serial.println(" V");
  delay(1000);
}
```

### Example 2: Using 20K Cermet as a Pull-Up Resistor in a Digital Input Circuit with a Raspberry Pi

In this example, we will use the 20K Cermet resistor as a pull-up resistor in a digital input circuit to read the state of a push button using a Raspberry Pi.

```python
import RPi.GPIO as GPIO

# Set up GPIO library
GPIO.setmode(GPIO.BCM)

# Define GPIO pins
buttonPin = 17
pullUpResistor = 20000  # 20K ohm Cermet resistor

# Set up button pin as input with pull-up resistor
GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)

try:
    while True:
        buttonState = GPIO.input(buttonPin)
        if buttonState == False:
            print("Button pressed!")
        else:
            print("Button released!")
        time.sleep(0.1)

except KeyboardInterrupt:
    GPIO.cleanup()
```

Note: These code examples are for illustrative purposes only and may require modifications to work with your specific IoT project or setup.

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