Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [hub]

37 questions
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4 answers

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 trying to connect two computers here. I'm thinking…
vicatcu
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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 the fly using on-board micro controller. I am…
user19579
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Can I Build My Own USB Hub?

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 chip I could use for, say, a 4 port hub? I know…
skillz21
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Homemade ethernet hub not working with three computers

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 ports: A, B, C: A+B works if C is empty. A+C works if…
mustafa öztürk
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1 answer

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 used in a USB hub or can I just continue with the…
Warriorrev6300
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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 the need for a hub. That's not the point, the…
Delaney Fitzpatrick
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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 were established (USB5807C). The hub allows for 1…
TokyoScarab
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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. I'm not able to identify the problem. The…
Villanut
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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 and attach to this one another one that has the…
edoelas
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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 draw more current and every thing is normal.I am…
Osama
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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 why I'm asking this.
user76920
2
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1 answer

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 for to find a suitable replacement?
Adam Trhon
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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 decays. When there is a device…
m126531
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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. Both RGB controllers use NPN transistors as a…
superN8
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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 thought was to get a 10-port USB 3.0 hub, connect…
srhslvmn
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