Arduino Uno Temperature Logger

This is an Arduino Uno-based temperature logger. The temperature circuit makes use of a 192-103LET-A01 thermistor and 10kOhm resistor to form a voltage divider. Smoothing is provided by a 1 uF electrolytic capacitor. Temperature is displayed to the user on the 7-segment display and is logged to an SD card in CSV format. An RTCC provides accurate time and date information for the log.

Hardware Requirements

• Arduino Uno x1
• DS3231 RTCC module x1
• 4-Digit 7-Seg Display w/ TM1637 driver module x1
• Seeeduino SD Card Shield Rev 3.0 x1
• 192-103LET-A01 Thermistor x1
• 10kOhm Resistor x1
• 1uF Electrolytic Capacitor x1
• 9V battery x1
• 9V to barrel jack connector x1
• Assorted jumpers
• FAT32-formatted SD Card x1

Software Requirements

This logger leverages a number of external libraries for hardware interface. All necessary libraries have been included as submodules. They include:

• RTClib
• SdFat
• TM1637

Please install these into your Arduino IDE prior to compiling.

Schematic

Implementation