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Fingerprint scanner for laptop and pi #piday #raspberrypi @Raspberry_Pi

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Found via Hackaday. Using a fingerprint scanner on a laptop and pi from Serve Rabyking – check out more here and here.

Recently I bought new Lenovo Yoga 300 laptop. The choice was really fast just the day before my travel to US. Basically I bought cheapest Lenovo laptop and just paid attention to screen resolution, battery power and weight.

The very first thing was installing Ubuntu on external HDD.

It works just fine. Actually touchscreen and screen rotation are not working but everything else works.

And I found that I really missing the fingerprint scanner. It so useful under Linux when you need to do so frequently sudo commands. And with fingerprint scanner it is just simple finger swipe instead of password typing.

I looked at my old Lenovo X200 laptop and typed lsusb and found that fingerprint scanner is actually on USB bus. Aha, this is USB device.

I bought spare 42W7764 fingerprint scanner taken from Lenovo laptop. It cost me around £3 from e-bay. It came with interesting flat cable and strange connector. That connector has 16 pins but flat cable has only four tracks. I just guessed that these four tracks basically USB bus. Close look at PCB confirmed that two offside pins are ground and power and two in the middle likely some differential signal.

Read more.


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