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Topic: Switching off SD cards for Low Power Data Logging (Read 418 times) previous topic - next topic


I saved SD power control to the end of my quest for low power logging, because of all the potential weirdness that could arise with the Arduino libraries. But after a reasonably thorough round of testing it all seems to be working OK with a BJT switching the ground line.


I realize that I might be playing with fire, but the potential gain in operating lifespan was simply too big for me to ignore. Unlike RTC pin powering, which I have a great deal of confidence in, I will consider this technique experimental till I see a whole crop of loggers saving data safely for more than a year...

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