Arduino Uno’s microcontroller board is great, but the one thing it’s not overly generous with is storage. Having 32KB of program flash storage, 2KB of RAM and 1KB of programmable EEPROM space at your disposal is fine for many Arduino projects, but it’s not enough when you need to record data. But with a $ 2 microSD card reader module from eBay, you can quickly add up to 32GB of space. What’s more, FAT32 software libraries for Arduino mean you can also load the card back into your PC.
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