Mini Pearl Logger

The Mini Pearl Logger is a powerful and inexpensive device for logging environmental data. It is based on an Arduino Pro Mini in combination with a real time clock and a microSD card reader. Combining these common electronic components allows logging data from multiple sensors for multiple months. Three different kits to build a Mini Pearl Logger are available at the KAPtery.

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Real time and temperature

by cfastie 19 days ago | 2 | 161 | 2

I had some [Mini Pearl Loggers][1] outside this month and encountered three potential problems re...

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How to make a low power timer

by cfastie 23 days ago | 1 | 145 | 2

I decided to turn the [DIY low power timer](

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A DIY low power timer

by cfastie 24 days ago | 1 | 158 | 1

[Adding a low power timer to a data logger](

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New data loggers for long-term logging

by cfastie 25 days ago | 0 | 148 | 2

_Above: Two Mini Pearl Loggers are in yogurt containers in my woodshed. BME280 sensors extend abo...

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Log all the data with Adafruit's TPL5110 Low Power Timer

by cfastie about 2 months ago | 2 | 351 | 1

Most of the data logging I did this summer and fall was to learn how to make a data logger operat...

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Longer Mini Pearl logging

by cfastie 2 months ago | 0 | 225 | 1

In mid October I started three [Mini Pearl Data Loggers](

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Adafruit Feathers for datalogging

by cfastie 3 months ago | 3 | 868 | 0

Two years ago, Adafruit introduced a new line of Arduino compatible microcontroller boards. The...

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Mini Pearl Logger Replication

by Zengirl2 6 months ago | 4 | 169 | 2

The manual by @cfastie does a good job at explaining the basics of the datalogger. I used the sim...

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Mini Pearl Logger longer

by cfastie 6 months ago | 0 | 193 | 1

I made some incremental progress getting the Mini Pearl Logger to log data for more than two week...

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Mini Pearl Jam

by cfastie 8 months ago | 2 | 273 | 2

*Above: Some perfectly good resistors that I removed from some perfectly good PCBs in hopes of lo...

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The Mini Pearl Logger

by cfastie 8 months ago | 3 | 341 | 3

This spring I did some tests with a [data logger based on an Arduino Nano](

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