---------- V0.4 ----------

HOW IT WORKS

• PT100 DRIVER

The PT100 is a resitor which changes its resitance depending on the temperature. At 0°C the PT100 has a resitance of 100 ohms. This resitor was placed in an bridge circuit and was calibrated to have an output of 0 volts, when the PT100 has a value of 100 ohms at 0 degrees.The maximum temperature should be 50°C. So the signal at 50 degrees was amplified to have an output of 5 volts which can be handled by the Arduino.

• DATALOGGER INTERFACE SHIELD

The shield basicly constist of an OLED, two potentiometers and a button.

First the counter and the delay have to be set with the potentiometers. The counter sets the amount of measurements and the delay sets the time between each measurement.

New V0.4

After that you have to set which sensor value is going to be on the display while the logging-process.

A second button allows that.

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After that the logging-processes is ready to start. Press the button!

The OLED indicates the process

OUTPUT EXAMPLE

The data is saved in a .log-file and can be easily converted to an excel-file

V1.0 (FUTURE)

• Integrate a RTC module to log time and date
• Optimize hardware
• Change between Fahrenheit and Celsius

SCHEMATICS

DATALOGGER INTERFACE SHIELD

PT100 DRIVER