Device Support
Hi all
I've been investigating the power consumption of the AudioMoth Dev board for my masters and have built a current-sense circuit to look with an oscilloscope. Here's what I'm getting at a 48kHz sample rate during recording. The SD card I'm using is the Samsung Evo Plus.
From what I understand, the large square waves (repeating every 340 ms) are the current drawn to write data to the SD card flash memory, but I can't figure out what the smaller, more frequent peaks are (see zoomed-in photo below). They seem to repeat every 2.7ms (~370Hz), which is too slow for clocking speed, sample rate or power switching and too fast for LED. I'm thinking SD card memory refresh, writing to SRAM , or some other component? Any advice on other features (such as which peaks correspond to the LED) or related information on power consumption would also be much appreciated.
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