I'm working on a very low power datalogging application using a Teensy 3.6 that writes to a microSD card. To reduce power consumption I want to place a high-side switch (P-channel MOSFET) on the card's Vdd line and power off the card when it's not in use. From the Teensy 3.5/3.6 schematic it appears that the microSD socket's Vdd is tied to the 3.3V rail. My question is this: Is there a way to modify the Teensy 3.6 board so that the microSD Vdd line can be switched on and off?
-Alex
Update: The µSD socket appears to be a Hirose DM3D-SF that has all solder connections exposed. I could desolder the Vdd pin, solder a wire to it, and insulate underneath. This could be prone to damage whilst inserting or removing the card though. Are there any other options available?
-Alex
Update: The µSD socket appears to be a Hirose DM3D-SF that has all solder connections exposed. I could desolder the Vdd pin, solder a wire to it, and insulate underneath. This could be prone to damage whilst inserting or removing the card though. Are there any other options available?
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