Questions tagged [hub]

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1answer
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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 ...
1
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1answer
72 views

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 on it but the basic design is a USB hub. The IC I picked at the time met the design requirements ...
0
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0answers
16 views

GPIO hub suggsetions?

I have pieced together a bunch of cheap hardware to control my pool. That said, I'm at the point where I need to share a few GPIOs with external devices. Notably, I need VCC/GND to be split numerous ...
1
vote
1answer
81 views

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 (...
0
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2answers
93 views

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 ...
0
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0answers
36 views

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 ...
0
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1answer
109 views

In a shimano dynamo hub with 6V regulator rest of power is 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. But the output voltage of the ...
1
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0answers
48 views

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 ...
1
vote
1answer
307 views

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. ...
0
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0answers
93 views

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 ...
0
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1answer
58 views

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 ...
2
votes
3answers
354 views

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 ...
0
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3answers
968 views

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 ...
2
votes
1answer
593 views

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 ...
5
votes
3answers
14k views

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 ...
-1
votes
1answer
317 views

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 ...
1
vote
1answer
3k views

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 ...
2
votes
2answers
338 views

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 ...
2
votes
1answer
578 views

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 ...
1
vote
3answers
519 views

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 ...
0
votes
1answer
1k views

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? ...
5
votes
2answers
3k views

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 ...
1
vote
0answers
319 views

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 ...
0
votes
1answer
534 views

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 ...
0
votes
1answer
590 views

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 ...
-2
votes
2answers
589 views

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 ...
5
votes
2answers
758 views

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 ...
8
votes
4answers
3k views

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 ...