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<-is a male USB-C connector, >-is a female USB-C connector, [laptop] is a Dell 5470, and [keyboard] is a Keychron K3Pro. Only one orientation of the connectors at position B results in communication between the laptop and keyboard. I expected the results to be the same regardless of orientation because I thought the USB-C design resulted in ...
For USB 2.0 or earlier, whether connecting to Type-C or a legacy type on the other end, the usual four wire configuration is permitted (recommended 2-4mm outer diameter) Source: USB 3.1 Specification @ usb.org-- specifically, the Universal Serial Bus Revision 3.1 Specification PDF available for download at the top of the page)
Seems like asking for trouble. The voltage will depend on the USB-UART adapter you use. The plan is: 1) To use normal USB cable to charge the battery through USB connector 2) To use the USB serial adapter with TTL for debugging For the second one everything should be ok, I use the adapter for debugging.
17. I make USB cables (USB-A to Mini or Micro primarily), but don't have any experience with USB-C. I would like to create a cable that has a USB-A (2.0) connector on one end, and a USB-C connector on the other (mainly for connecting keyboards to CPUs, and charging devices). How do I wire this properly (typically I use a 4-core 28AGW cable)?
My Dell power adapter (65W version) had a mechanical fault at the USB male connector shell (bent from internal PCB). I cut open the Dell connector to check the wiring on the PCB at the USB-C connector. It has the same red, white, blue, black wires. The labels on the PCB with the connected wire show (see attached pictures): GND - black; VBUS - white
3. In my experience, the most frequent cause of failure in USB cables is breakage of the conductors near the plug. The cable may work if the cable is positioned in one way, and fail if the cable is positioned in another. To test for such failure, connect the cable between two devices, such as a computer and a phone, and wiggle the cable in ...
You can test for continuity or resistance using a multimeter. Probe between the corresponding data pins: D+ on one side to D+ on the other, or D- to D-. The D+/D- lines are the middle two pins of a USB connector. Just select one on one side of the cable, and test continuity to both of the middle pins on the other side.
I also checked the USB-C spec from USB-IF and drawings there, for both male and female connectors, contain radius that isn't "squared off". They recommend a full-radius instead as shown on the Figure 3-1 in USB Type-C Spec R2.3 - October 2023 REDLINE versus R2.2 reproduced below:
A USB Type C receptacle — what you would be plugging your modified cable into — is prohibited from supplying power until certain conditions are met. This is necessary to prevent damage from two devices supplying power being connected to each other with a C to C cable.
16. Up until USB C all the USB connectors were carefully chosen so that two hosts could not be plugged into each other. With USB C both the host and device have the same connector. With this setup it is now possible to plug two hosts into each other. USB C does use an active cable which I assume arbitrates connections preventing any electrical ...