Hi guys,

I run 12V valves(insulated channels) and read pressure values by I2C with 
my BBB board. I don't understand what has happened but two BBB were broke 
down with this board.

When i am plugging in my power supply; one of the broken BBB's LED is not 
work, the other one's LED is on but does not open.

I wonder if is there any mistake(shortage) in my board?

There are the board's layout and schematic;
https://www.dropbox.com/s/tu3go2uei8ikryp/valf_layout.pdf
https://www.dropbox.com/s/dpziyloas6bttpl/Valf_schematic.PDF

Thanks for your help in advance.

Regards,
Ugur

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