2023 is the ten-year anniversary of the Cave Pearl Project, with hundreds of data loggers built from various parts in the Arduino ecosystem and deployed for Dr. Patricia Beddows‘ research.
Cheap, simple, stand-alone loggers enable teaching and research opportunities that expensive, complex tools can not. However there are a few trade-offs with this minimalist design: Supporting only Analog & I2C sensors make the course more manageable but losing the DS18b20, which has served us so well over the years, does bring a tear to the eye. Removing the SD card from the previous model means you have to think about memory constraints on run-time. The RTC’s one second minimum means this logger is not suitable for high frequency sampling – so you are not going to use it for experiments in eddy flux covariance or seismology. UV exposure makes the 50ml tubes brittle after about four months in full sun, and the coin cell limits operation to environments that don’t go much below freezing – although it’s easy enough to convert the logger to use two lithium AAA’s and we’ve tested those down to -15°C.
See the video below and how to build the loggers in the post here.
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- Source: https://blog.adafruit.com/2023/12/15/the-e360-a-diy-classroom-data-logger-for-science-arduino-science/
