connect USB keyboard to Arduino using clk and data wires

Question

Edit: What I'm looking for is some kind of library which could be used with an arduino to read the HID protocol output from the Data+ and Data- cables of the USB.

========== If I cut the cable of a usb keyboard, plug in power and ground can I use the clk and data wires to read keystrokes into the Arduino? If so any pointers to libraries and schematics?

Simple I instructions? The "for dummies" version?

EDIT

Following some of the suggestions below I found this:

https://github.com/julianschuler/USBKeyboard

Which looks like what I want to do, basically hook up the lines into the arduinio and read from the keyboard using the HID protocol in this library.

EDIT 2

That doesn't do what I want. Does anyone know how this could be accomplished?

Answer 1

USB doesn't have data and clock lines. It has a pair of data lines with inverted polarity (D+ and D-). The USB protocol is considerably more complex than you seem to imagine.

However there is a caveat: some keyboards have the ability to work in IBM PS/2 mode. For this you will need a USB to PS/2 adaptor (pictured below) and then use the PS2Keyboard.h library. Your mileage may vary, though, as not all keyboards will work.