Design with DS18B20 Temperature Sensor in Cirkit DesignerThe DS18B20 is a digital temperature sensor that provides temperature readings in degrees Celsius with an accuracy of ±0.5°C. It communicates with microcontrollers and other digital devices using the 1-Wire protocol, which allows multiple sensors to be connected to a single data wire. This sensor is widely used in a variety of applications, including environmental monitoring, home automation, and industrial control systems.
This circuit is designed to measure temperature using a DS18B20 sensor interfaced with an Arduino UNO. The Arduino reads temperature data from the sensor via a 1-Wire bus with a pull-up resistor and outputs the readings to the serial console.
Open Project in Cirkit Designer
This circuit features an ESP8266 NodeMCU microcontroller connected to a DS18B20 temperature sensor. The sensor's data line (DQ) is connected to the D2 pin of the NodeMCU through a 4.7k ohm pull-up resistor, which is a common configuration for one-wire temperature sensors. The sensor is powered by the 3.3V supply from the NodeMCU, and both the sensor and the NodeMCU share a common ground.
Open Project in Cirkit Designer
This circuit involves an Arduino UNO microcontroller interfacing with a DS18B20 temperature sensor. The sensor is powered by the Arduino's 5V and GND pins, and its data pin is connected to a digital I/O pin on the Arduino, with a pull-up resistor in place. The setup is designed to read temperature data from the sensor.
Open Project in Cirkit Designer
This circuit is designed to monitor temperatures using multiple DS18B20 1-Wire temperature sensors connected to an Arduino UNO microcontroller. The sensors are powered by the Arduino's 5V output and share a common data line (DQ) connected to digital pin 2 through a 4.7kΩ pull-up resistor, allowing for simultaneous temperature readings. The Arduino runs a sketch that reads temperatures from each sensor and outputs the readings to the serial monitor in both Celsius and Fahrenheit.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | GND | Ground pin, connected to the system ground |
| 2 | DQ | Data pin, used for 1-Wire communication |
| 3 | VDD | Power supply pin, 3.0V to 5.5V |
#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is connected to pin 2 on the Arduino
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);
void setup(void)
{
// Start serial communication for debugging
Serial.begin(9600);
// Start up the library
sensors.begin();
}
void loop(void)
{
// Request temperature measurements from the sensor
sensors.requestTemperatures();
// Fetch and print the temperature in Celsius
Serial.print("Temperature is: ");
Serial.print(sensors.getTempCByIndex(0));
Serial.println("°C");
// Wait 1 second before requesting new data
delay(1000);
}
sensors.getAddress() function to ensure each sensor has a unique address.sensors.search() function to find all devices on the bus.Q: Can I use the DS18B20 sensor without an external power supply?
A: Yes, the DS18B20 supports "parasite power" mode, where it draws power from the data line. This requires only two wires: the data line and ground.
Q: How many DS18B20 sensors can I connect to a single microcontroller pin?
A: You can connect many sensors to a single pin, limited by the bus capacitance and the quality of your pull-up resistor. In practice, around 10-20 sensors are often manageable.
Q: How do I waterproof the DS18B20 sensor for outdoor use?
A: You can purchase the DS18B20 in a waterproof probe form, or you can waterproof a standard sensor using appropriate sealing techniques and materials like heat shrink tubing and silicone sealant.