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83 Threads found on Hub Usb
Hopefully someone with some expert usb knowledge can help me. I have a 4 port usb 2.0 hub that is using an Alcor AU6254 microcontroller. The 4 port hub is comprised of two boards -a Main board and a daisy chained secondary board. Two ports on each board. Each board has the same microncontroller. When certain HID devices (...)
Hi, Use an usb hub. Is there another option? Klaus
How do you have a four-port usb hub consolidate to one usb port and the computer knows which usb is talking to it at any given time? I think of like a keyboard (multiplexer?) but a friend says "Serial Communications", I accept to be wrong but why all the articles don't seem to actually explain how... just mentions things (...)
I use multiple external hard drives with my current laptop (3TB (3.5" usb External), 2TB(3.5" eSATA External), 1TB (2.5" 9.5mm tall usb hub Cooling Pad), and 1TB (2.5" 12.5mm tall usb HDD Shell). the 1TB (was unpowered) in the shell fell out of my hand while shifting my laptop, cooling pad, external hdd, and power cord (...)
Best to read what TI says about Port hub power and pay attention to the ESR*C values used on +5. Provisions to prevent excessive hub surge and also low ESR < 1 Ohm >>> * C value <100us
Hi Could someone please explain to me how a self-powered usb hub with a power switch detects that a device has been plugged to one of its ports? Is it right that a usb hub, on its own without using a power switch, detects a device by monitoring the voltage on the data lines? The hub has 15k pull-down (...)
Reference designs are published by hub chip vendors. They usually rely on a 5V DC supply, so you need a small SMPS. Calculate 500 mA for each downstream port and about 300 mA for the hub, usually regulated down to 3.3V. I have used SMSC/Microchip usb2514 4-port hub some time ago.
Hi everyone, I'd like to know if this works technically. I'm not an embedded systems engineer. I have plans to make a main control device powered by a PIC32MX795F512L that also has a 7 port usb hub on the same PCB powered by the usb2517. The PIC32 will connect to the computer via usb CDC and Ethernet. Connected (...)
I have an arduino and 7 Port usb hub. I want to make the usb hub more smarter by adding an arduino to it. What I'm trying to do is, whenever a device is pluged(offline or online) into usb hub port, I want arduino to detect it. If anything is plugged in or not in any of these ports. Some (...)
usb specification requires short circuit strength of usb receivers, any usb data or power line against each other. In so far the hub shouldn't be damaged even if the device is controlled incorrectly. I think the most likely explanation is this: Your 12 pin connector misses the feature of power/ground connecting first but (...)
in my project i need usb hub controller with 2 port. I have seen TI's controller Tusb2036. but i m looking for alternative and controller also. so which usb hub controller is better than this.
Hello, as the title suggested, I am trying to add 2 ethernet interface and several usb port to my Rasp Pi, using LAN9512. Since this will be used in project and the client wanted me to make the device as small as possible, using already available usb hub and usb to ethernet is not possible. In fact, I did so for first (...)
Dear All I am looking for Free software that can use to check and monitor Enumeration process from the OS point of view ,when we connect usb device ( Ex: Pen drive ) to the usb hub under windows OS Thanks In advance
Hi, I need to interface lots of microcontrollers to a single Windows PC. How much - 100 pieces. All of them have UART, of course; but usb is not available. I was wondering if I can use 11 usb hubs, each with 10 output ports connected in daisy chain. PC | 1to10 usb hub | 10x 1to10usb (...)
There are unlikely any problems with short unshielded cables (e.g. 10 or 20 cm) for full speed usb. The problem is most likely about your hub design and hasn't to do with the cabling. You didn't report circuit details, so no further comments possible.
The question isn't very specific. "transmit its output to a software using wi-fi" sounds like the job of a basic wifi-to-usb hub which can be better purchased from the shelf.
Hi I'm new to the board and in need of some help. Im an amature astrophotographer and dealing with 12v and 120v power sources. I need to keep my equipment using 12v's an not rely on a 12v to `120v converters these was battery life which I need the most. The equipment I am questioning is fairly easy but my knowledge is none. I need to power my usb h
Trying to use PLX usb controller NE2282 PCI-3.0 Interface. This IC supports only one port. How do I design for connecting two downstream ports. Should I use a separate 2 port hub controller say from SMSC and connect it to NET2282?
usb hub usb2514 - implementation doubt I'm using usb2514 to design a BUS powered system which has 3 devices to be connected at present . My doubt is regarding the SUSP_IND/LOCAL_PWR/NON_REM0 pin . My system is bus powered so the pin has to be LOW . The device on my port 1 is non removable so the pin has to be HIGH . (...)
Hello sir, In my project I am implementing 4port usb hub. Can anybody suggest me a cheaf and best ic for that?