What I really wanted, though, was the SD card slot. This is very similar to the KL25Z board but has a bit more of everything–speed, memory, etc. My requirements mean I needed a slightly more capable board. It doesn’t have to be too fancy or meet the same specs as some of the lab gear I have, but it should be easy to carry, power off USB, and work by itself when required. In particular, I often have a need for a simple and portable waveform generator. I wanted to revisit mBed, though, and show something with a little more substance. Last month, I talked about how to get started with mBed and ARM processors using a very inexpensive development board.
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