Contents
What type of sensor is DS18B20?
digital temperature sensor
The core functionality of the DS18B20 is its direct-to- digital temperature sensor. The resolution of the tempera- ture sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The default resolution at power-up is 12-bit.
What is the difference between thermistor and thermostat?
In general, a thermostat is a cruder device than a thermistor. A thermostat only permits the metals to rise above or press upon a contact as temperature changes. A thermistor is more complex because it can read changes in conductivity and, thus, can express minute changes in temperature as conductivity changes.
What kind of Temperature sensor is LM35?
LM35 is a precession Integrated circuit Temperature sensor, whose output voltage varies, based on the temperature around it. It is a small and cheap IC which can be used to measure temperature anywhere between -55°C to 150°C.
What is the resolution of the DS18B20 thermometer?
The core functionality of the DS18B20 is its direct-to-digital temperature sensor. The resolution of the DS18B20 is configurable (9, 10, 11, or 12 bits), with 12-bit readings the factory default state. This equates to a temperature resolution of 0.5°C, 0.25°C, 0.125°C, or 0.0625°C.
How to wire a temperature sensor to an Arduino board?
The following table shows how you should wire the DS18B20 sensor to your Arduino board: Each DS18B20 temperature sensor has a unique 64-bit serial code. This allows you to wire multiple sensors to the same data wire. So, you can get temperature from multiple sensors using just one Arduino digital pin.
How to connect DS18B20 to Raspbian Pi?
The latest version of Raspbian (kernel 3.18) requires an addition to your /boot/config.txt file for the Pi to communicate with the DS18B20. Run the following to edit this file: If the following line is not already in this file (if it is, it is likely at the bottom of the file), add it and save the file.
How to start a temperature sensor on a pi?
Restart your Pi for the changes to take effect. To start the temperature sensor read interface we need to run two commands. Go to a command prompt on your Pi or SSH into your Pi. Type the following commands: The output of your temperature sensor is now being written to a file on your Pi.