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In simulator, left is USB connection to the computer from the breadboard, middle drop is breadboard, and right connection from breadboard is to the mouse or keyboard USB connection. It takes a few female to female USB connections to not have to cut up the cables on the computer.
Holding the USB cable plug ready to plug-in to computer the four wires are left to right.
#1. red wire which carries 4.9 to 5.2 volts DC
#2 white wire at of 3.4 volts with square type pulse packets
#3 green wire at of 3.4 volts with square type pulse packets
#4 black wire which is ground
With computer ON and mouse or keyboard connected to oscilloscope through wires passing through breadboard and at idle, the very fast repeat mirror packets on #2 wire and #3 wire stay the same. With movement or push a button more mirror data is added to back of usual packets.
#2 wire, in front of pulse packets seems to carry the clock signal and #3 wire is like a mirror image of the #2 pulse packets. Or, picture this, wire #2 is pulse packets starting at 3.4 volts maximum and going downward and wire #3 is pulse packets starting at very low volts and going upward to 3.4 volts.
Somehow, I figured the mouse and keyboard would clock slower than the computer, yet did not find that to be the fact.
While passing the signal from the keyboard or mouse through the breadboard, I disconnected the #3 green wire. Immediately the computer sounded an alarm and a USB Device Not Recognized warning.
Trying the USB Flash Drive was more touchy as any changed connections corrupted the text or video being sent.
I stripped insulation off skinny USB wires with a large pair of fingernail clippers. I removed lever arm and pivot pin. Put in a small bolt through pivot hole with a wing nut to slowly tighten the jaws. I tack welded the bottom of bolt to better control the tension adjusting. Tighten the jaws on wire, give wire and half twist in the fingers, tighten jaws some more. Keep repeating until the insulation in front of the jaws twist a lot and behind the jaws very little. Solder a small piece of breadboard hook up wire to press into the breadboard. Twist and pull on wire end lightly until insulation comes off. Custom wire stripping.
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