Hello everyone,
I have a Project that requiers a wireless communication . And for this project I am using a Pt100 and a Led. I have read that the pt100 doesn't connect directly with arduino. My project is that when my sensor detects a temperature higher than 70 will turn on the led on larduino number 2, So I am wondering on how is my pt100 going to send that signal to my led ? does it has to be a digital signal ? I'm quit lost .. Need of help
thank you for your time and answers as well.

 

You will need an amplifier for the Pt100 signal. You can get them ready made fairly inexpensively or yu could build your own.

 

You will need an amplifier for the Pt100 signal. You can get them ready made fairly inexpensively or yu could build your own.

Why do we need tp add it ? why isn't connected directly like other sensors ? can you please explain?

 

You use a divider you really need post a link to what your using some need resistor

 

Do you have to use a Pt100, do you need the high accuracy?
It would be much easier to use a thermistor which can be connected directly to an arduino needing only one resistor to form a potetial divider.
For instance: http://www.circuitbasics.com/arduino-thermistor-temperature-sensor-tutorial/

 

Pt100 is kind of a thermistor 100 ohm

• Material is platinum and resistance value is 100 ohm at temperature 0 °C