Questions tagged [hub]
The hub tag has no usage guidance.
36
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RGB Hub using MUX and PNP
I have 2 RGB controllers that I am trying to connect through a multiplexer that will be controlled from a GPIO pin on microcontroller (Seeed Xiao SAMD21) so I can freely switch between the controllers....
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2
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What determines the maximum number of devices that can be connected through a single port of a USB 3.0 switch?
I need to connect about 10 different electronic devices (lasers, cameras, motorized stages etc.) to two PCs, such that you can choose to control the whole setup from either one of those PCs.
My first ...
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242
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How can I configure an Ethernet switch to a hub to use with Wireshark? [closed]
I would like to use Wireshark to watch the communication between my device and the server. I basically need an Ethernet hub to deploy the environment of testing. My trouble is that Ethernet hubs are ...
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1
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why did my powered usb hub kill my computer's usb port? [closed]
Curiosity kill the computer port. But why? I bought a 4 port USB 2.0 hub. I removed Vcc and Gnd from the Type A connector of the hub. Then I powered the hub and inserted a USB stick into one of the ...
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2
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Are large decoupling capacitors necessary for USB hub plugs
At the bottom of this data sheet:
https://datasheet.lcsc.com/lcsc/1811151645_CoreChips-SL2-1A_C192893.pdf
the reference circuit diagram shows huge 100uf decoupling capacitors connected to the USB ...
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175
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USB Downstream Port (with Power Charging) [closed]
I have a Dell UltraSharp 32 4K USB-C Monitor: U3219Q with a USB Downstream Port (with Power Charging). I have the monitor connected to my laptop via USB-C.
If I connect a USB device (let's say an ...
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Why does 10BASE-T require hubs?
As I understand it, some of the physical layer options for Ethernet include:\
10BASE5 (now considered obsolete): a single length of thick coaxial cable.
10BASE2: thin coaxial cable, of which multiple ...
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687
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Do we need an IC to make a USB hub?
I am planning to make a USB hub for my PC.
I was thinking about just making it like this:
When I search the internet for circuit diagrams, there are many circuit diagrams with an IC. Must an IC be ...
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372
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Designing 7 port USB hub for a custom project
I am attempting to design a basic 7 port USB hub that will be used in a custom 3D printed case. It will connect to a FPGA device and be powered by a 5V adapter through a barrel plug. I'm stuck on a ...
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Why can't you make a thunderbolt 3 hub?
So laptops with thunderbolt 3 are pretty common, docks are common, every other kind of USB seems to be able to be used with a hub. I know thunderbolt 3 can be daisy chained, theoretically eliminating ...
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301
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Adding HDMI to a USB Type-C hub design
I've been working on this design for a client for a little while now. I can't go into full specifics, but the basic design is a USB hub. The IC I picked at the time met the design requirements that ...
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Is it possible to use ethernet communication between MCUs without using a hub or switch?
Is it possible to connect some MCUs together in a star topology, without using any hub or switch?
EDIT: There will be a main MCU in the star topology and it will be receiving 2 different GPS datas (...
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153
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PCB with multiple Arduinos and onboard hub
I'm designing a PCB for an astronomical observatory which needs several Arduino Micro to control different devices. Since the circuit must fit a very small space, I'm putting an onboard USB hub to ...
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Should I use Multi Transaction Translator?
I'm designing a board which has two USB 2.0 Full-Speed (12 Mbps) USB-UART controller (CP2108).
These controllers will be communicating with the PC via an USB2422 HUB.
This hub has got a Single ...
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4
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988
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In a Shimano dynamo hub with 6V regulator is the rest of the power being wasted?
I bought a Shimano hub dynamo that gives a maximum of 6 V with a regulator that they have provided. From what others here have said, the regulator is a Zener diode.
The output voltage of the dynamo ...
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USB 2.0 Maximum current through hub
I have a question regarding USB2.0 power negotiation. I'm in the process of improving the design of a support equipment PCB that utilises an FT232H chip.
The layout of the current board consists of ...
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853
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USB2517 USB hub unable to enumerate
I've made a USB hub PCB using a USB2517 controller, but it's not working. When I plug it into the host computer, I get a "not recognised" message on Windows and "unable to enumerate" message on Linux.
...
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158
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Why wont Micro USB Hub work with UVC Receiver?
I want to charge my phone and be able to receive wireless signal via a UVC Receiver. So I ordered a Micro USB Hub Adapter that supports OTG and charging. Well, I tested the hub adapter today, but the ...
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124
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USB3/2 hub cascading (reverse hierarchy)
I want to implement multiple USB ports using one USB3.0 and one USB2.0 hub with four ports each.
The microprocessor I want to implement these ports for has just a single USB3.0 port left (of which the ...
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3
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521
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USB hub inside modular keyboard for comunication
I'm working on a personal project which consists on a keyboard that also serves as a hub in order to connect more keyboards. For example, I could have the main keyboard with the letters and symbols ...
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3
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GL850G-SSOP28 datasheet - Ferrites values? [closed]
I have found a circuit for using the GL850G chip to build a powered USB 2.0 hub:
http://pdf-file.ic37.com/uploadpdf_old/GENESYS/GL850G-SSOP28_datasheet_898289/146940/GL850G-SSOP28_datasheet.pdf
...
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Bldc hub motor starting torque
am designing a BLDC hub motor (48V-500W-15A max)
I have designed a three phase inverter and the motor run normally with smooth rotation and as the motor start running and I apply the load the motor ...
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Can I Build My Own USB Hub? [closed]
Would it be possible to make a USB Hub from scratch? Like, designing a PCB, and hand soldering components on to it? What microchip would I have to use as the controller? Is there a simple controller ...
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Hub usb connected to ATX of the same desktop pc [closed]
I am new here and I am newbie in electronic. I studied electronic a lot of years ago.
I am attempting to connect my usb hub to 5V output of my ATX of desktop pc, as explained here:
Can an ATX PSU ...
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3k
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Cloning a USB signal - feed two USB hubs with one input port
I have a schematic for a 4 port USB hub (4 output ports, 1 input port). I'd like to make two of these hubs and connect them together, thus making a 7 or 8 port USB hub on a single PCB.
I know there ...
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2
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379
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LED hub purpose?
What is the main purpose of LED hub, is it used only for RGB matrices to connect shift registers for every color or there are some other applications?
I'm working with HUB75 and that is the reason ...
user76920
2
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1
answer
656
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choosing diodes for a passive ethernet hub
I found several guidelines for building a passive ethernet hub, mostly quoting this. The guide specifies which diodes to use, but I cannot find them anywhere. What are the parameters I should search ...
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3
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558
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Wheel speed from Shimano dyamo hub using arduino
I'm trying to figure out a way to extrapolate wheel speed from the Dynamo hub I just purchased. I outputs 6V 3W AC, and I would like to potentially measure it using an arduino if possible, I' assuming ...
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Make simple 3 port ethernet switch/Hub [closed]
How can I make a simple cheap 3 port Switch?
I have 30 10-base low speed Ethernet devices and I want to connect them together, how can these devices connects together with simple Bus topology?
...
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3k
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Homemade ethernet hub not working with three computers [closed]
I am trying to connect three computers in one network. I have connected the wires like the photo.
I works with two computers but not three computers at the same time.
For example, let's name the ...
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0
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327
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USB hub acting differently towards another hub and device
I have a USB hub that supports individual port-switching. I'm shutting off a port using the libusb library. When there is nothing connected to the port, the power pin drops from 5V to 1.5V and slowly ...
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561
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Passive Ethernet Hub / Point to Multipoint Ethernet
I have a device which needs to connect to one of three devices using ethernet. When one device is connected, the other 2 will be powered down. Power consumption is a factor, so I'd like to use a ...
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636
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External powered USB hub
I am planning on building a quite large USB hub, which final use is to connect, charge and sync let's say 40 iPads. The iPad electrical specification from Apple states that each unit needs to have ...
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raspberry pi + USB Hub [duplicate]
I bought a cheap USB Hub Powered to connect my Raspberry Pi and two External Seagate HD (USB 2.0/3.0), but obviously that 400 mA is not enough for all this things.
So, I want to buy a new AC Adpater ...
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Question related self powered USB Hub
We have a requirement, which is a normal self powered USB Hub, with individual power control of the ports, i.e in addition to a normal Hub, we want to remove the power to any of the downstream port on ...
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4
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Ethernet Without a Switch?
How do you wire up Ethernet electrically without a switch? An approximately equivalent phrasing of this question would be what is going on electrically inside an Ethernet Hub?
To clarify, I'm not ...
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