2017 - Basic Arduino 3 input temperature logger with SD card storage for PT100x sensors, based on the MAX31865
From Jun-2017
Proof of concept for a simple yet versatile temperature data logger based on the Maxim MAX3165 and Arduino with a battery and charging possibility. The layout was built around Adafruit Feather components and the possibility of hand soldering and replacement sockets. The jumpers and switches change between 2wire and 4wire operation, and PT100 or PT1000 sensors. Measured data is displayed on an OLED display and stored on SD card, measurement intervals could be changed with buttons. All resource files and a detailed descripton at https://hackaday.io/project/20372-ptlogger. This feels very basic compared to the later projects.
