High-speed USB3.0 shareer Four in four out Select HUB+ switcher

##### Bilibili video:[https://www.bilibili.com/video/BV11D4y1s7so](https://www.bilibili.com/video/BV11D4y1s7so) # 1. Introduction Function: When multiple USB3.0 or USB2.0 devices need to switch between different devices frequently, this project can quickly switch between different USB mount devices. Similar product: USB raffer, this product is a USB device shared by four computers.  * * * For example, A, B, C, and D are connected to the switch using USB-A to TYPE-C, and the USB device is mounted with a mouse, keyboard, and large-capacity USB storage device. When the switcher switches to computer A, the mouse, keyboard, and large-capacity USB storage device mounted on the USB device will be connected to computer A, and other computers will not be connected. When you need to switch the computer to use, you don't need to pull out the mouse, keyboard, and large-capacity USB storage device mounted on the device in USB, you only need to safely eject the large-capacity USB storage device in computer A and press the switch button in the switcher button to switch to computer B, and the mouse, keyboard, and large-capacity USB storage device mounted on the device in USB are all reconnected to computer B, disconnected from computer A, saving the trouble of unplugging and unplugging the USB mounting device. * * * Application: A set of mouse and keyboard peripherals, camera, microphone, high-speed USB, mobile hard disk, etc., using multiple computer devices, such as: desktop + notebook + Raspberry Pi development board + game console, etc * * * Principle: The TYPE-C USB3.0 interface is used to communicate with the host. Through the VL160, the TYPE-C USB3.0 is converted into the ordinary 2 high-speed differential USB3.0 signal, and the 2.0 signal on TYPE-C is combined to form the ordinary USB3.0 signal. Switch four types of USB3.0 high-speed signals from TYPE-C USB3.0 to the VL822 USB3.0 HUB chip through the CH484M high-speed switch. The VL822 extends 4 USB 3.0 signals to external devices. * * * I have made USB 2.0 switchers before, which are more suitable for low-speed devices such as keyboards and mice. Link:[https://oshwhub.com/Aknice/e3a68120fa8d49ff8bc50ad21d57ec9d](https://oshwhub.com/Aknice/e3a68120fa8d49ff8bc50ad21d57ec9d)    # 2. Block diagram  # 3. Actual measurement TYPE-C line needs to use USB3.0 TYPE-C, ordinary TYPE-C line can only run 2.0 speed.  There is currently no better high-speed equipment on hand, so only so fast. # 4. Shell Screwless snap-on design.  # 5. Summary Purely hardware controlled, the chips are QFN to test the welding level. Modification suggestion: It is recommended to use differential for USB high-speed signal, and do 90 ohm impedance matching. **The thickness of the plate should be 1.0, and the actual adjustment is based on the thickness of the splint TYPE-C, and the general splint is 1.0 or 0.8.**