Hi,
I have a microcontroller interfacing with an SD card. I want to be able to remove the power supply from the SD card when the device goes into "sleep" mode. I use the following schematic to connect/disconnet the sd card power supply:
When pulling the base to GND the sd card turns on. But when i try to turn the transistor off, the collector only drops to 2.8V and never disconnects the SD card from the power supply(VCC).
I dont understand what is wrong with this circuit, when removing the SD card and connecting a load to the transistor collector pin the transistor works as it's supposed to do so it looks like the SD card is causing this behavior. Any advice?
Regards,
Sisco
I have a microcontroller interfacing with an SD card. I want to be able to remove the power supply from the SD card when the device goes into "sleep" mode. I use the following schematic to connect/disconnet the sd card power supply:
When pulling the base to GND the sd card turns on. But when i try to turn the transistor off, the collector only drops to 2.8V and never disconnects the SD card from the power supply(VCC).
I dont understand what is wrong with this circuit, when removing the SD card and connecting a load to the transistor collector pin the transistor works as it's supposed to do so it looks like the SD card is causing this behavior. Any advice?
Regards,
Sisco
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