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# USBvalve
*Expose USB activity on the fly*
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I'm sure that, like me, you were asked to put your USB drive in an *unknown* device...and then the doubt:
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With **USBvalve** you can have an immediate feedback about what happen to the drive: the screen will show you if the *fake* filesystem built on the device is accessed, read or written:
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## Repository Structure
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## Build USBvalve
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### Part list
If you want to build your own, you need:
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Almost all the job is done directly on the board by the software, so you just need to arrange the connection with the OLED for output
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#### With USBvalve PCB
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- place the Raspberry Pi Pico on the silk screen on the front
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For example if your OLED has GND on PIN1 and VCC on PIN2 like this:
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You have to place a blob of solder on these two pads on the back of the PCB:
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Otherwise you should the opposite and place the solder on the other PADs:
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#### Without USBvalve PCB
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If you are using a breadboard or just wiring, all you have to do is to ensure to connect the proper PINs at the OLED screen.
The mapping is the following: