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schematic drawing software
I use Eagle
It's free for pcb's up to 80x100 mm.
Try it.
Added after 31 seconds:
I use Eagle
It's free for pcb's up to 80x100 mm.
Try it.
spi mode
I have found what the problem was.
it was my own stupid mistake.
The SD card connector has also two switches to detect if the card is present and if the write-protect switch is enabled.
I connected these switches to 2 pins of my microcontroller.
I forgot to set the pin configuration...
sd card current consumption
I have a project which uses a SDCARD in SPI mode.
I have no problem interfacing with the card but as I want to use this project powered by batteries it draws to much current.
My system draws 23mA without the SD card inserted.
The moment I insert my SD card, the...
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