-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
formatting link
| 1962 | I love to cook with wine. Sometimes I even put it in the food.
Since USB is so, um, universal it's not surprising to find a manufacturer who keeps model numbers and prices the same but has changed the chip(s) inside which may noticeably change performance, unfortunately. I.e., the popular D-Link DUB-H7
formatting link
has been around for at least 5 years now, and has gone through multiple internal design revisions.
I have one of these that I like:
formatting link
-- pretty inexpensive and it "works fine for me."
Note that very few hubs -- almost none once you're above 4 ports -- comes with a power supply beefy enough to provide a full 500mA to all ports; I've often felt that the ratio of the power supply's current output to "number of ports multiplied by 500mA" gave at least some indication of the quality of the design. (I.e., if they cut a bigger corner with the power supply, they probably made bigger cuts elsewhere...)
Manufacturers do this, of course, since it's incredibly unlikely anyone would actually have, e.g., 10 peripherals that all truly need 500mA on a
10-port hub, so they save money with a smaller power supply.
I have not nearly that much load, but that looks like a safe bet. ...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
I was all set to buy a hub when I came across a computer lying on the sidewalk, and it had a USB board inside. No need for a hub after that, but I do get more USB ports.
Of course, if there was a special reason for a hub, you didn't mention it.
Eeek, Senior moment? Well, I sure didn?t get the full 667mbs theoretical thruput, but is was somewhere around the USB port speed. Which must have been ~400mbs, not 200mbs. I should check it again. But the point was that it worked with out a hitch.
That's not low profile. I bought two of these from another seller. Three weeks later I got an e-mail stating that the entire shipment was defective, and they refunded the money.
formatting link
This is interesting:
formatting link
I've had computers with dead USB ports because of bad drivers and no way to update, since they had no PS/2 ports.
--
You can't have a sense of humor, if you have no sense.
I guess there's a lot of those "industrial" keyboards (either ruggedized or with extra keys or whatever), barcode scanners, etc. that have PS/2 interfaces and aren't going away any time soon? So on new builds it ends up being easier to stick in a card like that than to pick from the small number of motherboards that still have PS/2 keyboard/mouse support?
I've seen plenty of PS/2 to USB converters for keyboards and mice, but for industrial PCs I can see that a PCI card might be a bit more attractive.
The difference with this card is that it goes under the PCI bus and gets an interrupt assigned to it as in the legacy method and will almost always underlying OS support, whereas a USB to PS2 device will not get an interrupt and *has* to also have underlying OS support for an HID device.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.