This sketch acquires data and stores it on an SD card. In my tests using a Teensy 3.6 and a SanDisk Ultra 16GB SDHC micro SD card, I was able to record an analog pin at 25 kHz. It relies on the beta ...

And, it's fast. Taking the old 150KB/sec CD standard as 1x speed, the SanDisk Ultra II SD Plus USB is a 60x card, reading 10-MB a second and writing 9-MB a second. And SanDisk gives you a lifetime ...

This 1.5TB SanDisk Ultra option is a powerful performer and provides the benefit of being the largest Micro SD card currently available. It's also down to £90 on Amazon, saving you 40 percent on ...