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USB
Sci.Electronics.Basics is a worldwide Usenet news group that is used to discuss basic electronics questions.
We found 200 threads matching "usb"
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The most relevant threads are listed first
Integrated USB controller just died
Jack B. Pollack - 2006-10-01 09:41:00
All of my integrated USB ports have just died, I was using it earlier to
sync my PDA. I have since tried other USB devices on this PC and they also
don't work, and the PDA does works on another computer.
It is not a software/OS problem as this computer has a removable HD and I
have booted into...
usb flash controller
zoir - 2007-04-26 01:34:00
Hi,
I have question about usb flash controller. I'm trying to design my
own usb stick.
So, which usb flash controller you suggest?
The preferable is that easily programmable one, maybe even usb driver
and flash driver is implemented on firmware.
...Why is Motorola USB not Blackberry USB (chargers = 5.0v, 5.9v, 350ma, 500ma)
Emily - 2006-12-28 15:43:00
Is it true that one MUST use ONLY the EXACT USB charger that comes with
their cell phone or digital camera?
Are USB chargers really not interchangable?
The T-Mobile store told me I could only use their T-Mobile charger for my
new USB based cellphone. After showing me the charger for the M...How do I programmatically send signals to USB?
2007-04-30 15:09:00
Hello
How do I control voltages to pins of the USB programmatically?
For example, I'd like to say send a signal to individual USB pins (if
that's applicable in USB) how do I do that ?
Also what's the appropriate newsgroup for this question? Thanks .
...Which USB standard connector is now required by law?
Sharon Ciccio - 2007-08-17 04:40:00
Does anyone know WHICH standard USB connector is now required by law in
China?
http://www.eetimes.com/rss/showArticle.jhtml?articleID=199800238&cid=RSSfeed_eetimes_newsRSS
Is it the mini-usb or the micro-usb?
http://en.wikipedia.org/wiki/Image:USB_types.jpg
While the mini-usb has been ar...Re: mini usb 5v datasheet
Ken - 2009-04-13 01:24:00
On Sun, 12 Apr 2009 15:38:20 -0700 (PDT), josegidayfin@gmail.com wrote:
> Dear all,
>
> Can any one tell me the data sheet of 5V mini usb 5 pinout (THA
> component) ?
Here
http://www.google.se/search?hl=sv&num=30&q=USB+mini+pinout&btnG=S%C3%B6k&meta=
...Re: Help Building a USB-Controlled USB Outlet?
TonyR - 2008-01-30 19:55:00
Have a look at Diolan.com
On Wed, 02 Jan 2008 22:36:29 +0000, noreply wrote:
> I am a novice and would like to build a 120V AC outlet which can be switched
> on and off by USB. I'm not sure what all I will need and want to make sure
> that I'm not trying to do something much harder...Re: iPod Chargers Question
Dave - 2008-05-23 10:33:00
"PhattyMo" wrote in message
news:4836434d$0$87064$815e3792@news.qwest.net...
> Talal Itani wrote:
> > Why is it that some USB chargers cannot charge the Apple iPods? I tested
> > multiple USB charges, and only those that say "for iPods" work.
>
>
> There's some tricks..
> Some...Re: USB drive in a ziploc bag?
2008-06-19 13:36:00
On Jun 15, 12:39 pm, Baron
wrote:
> > I put a USB stick on my keyring and then dropped my keys on the
> > concrete. The USB stick never worked again.
>
> Its usually the oscillator xtal that gets shattered ! Not that you can
> see the damage inside the casing. Getting it off the ...Getting started with USB
Arthur Rhodes - 2007-03-12 21:39:00
I have a project in mind to build a device with a USB interface.
The device would store some data in an eeprom. There would be some
synchronization software written for it and residing on a computer.
When the device is plugged into a USB port on the computer the
synchronization software would la...A basic USB oscilloscope
matthijsfh - 2007-08-28 15:20:00
Hai,
I just received the USB osciloscop I ordered and it is a nice, basic, scope.
You can check the specifications on :
www.usbscope.eu
I like it!
Matthijs
...Basic question about LEDs with USB chip
Dave - 2007-04-28 13:33:00
Hi, I'm working on a device that uses a PIC chip to control 6
terminals via USB. The terminals can be signaled on/off independently
using 6 optocouplers. I would also like to add 6 indicator LEDs.
USB is of course 5V and I believe the PIC is sending about 5V out.
I'm now using 470 Ohm resi...USB powered desk fan
2007-04-01 17:55:00
It is hot in my office and for some reason I don't have any available
power outlets near me to power a desk fan so I want to make a fan that
is powered by USB. I bought a cheap handheld fan that is powered by 2
AA batteries (3V) and I want to convert it to run off a 5V USB
computer port. I ne...Dell FP Monitor screwing-up sleep mode on Mac
Brett - 2007-02-11 18:56:00
I just got as a gift a Dell 2407WFP Monitor to use with my Mac G5. The
monitor has a built-in USB hub & universal USB media reader. This is really
handy for me as my CPU is located way under my desk. Unfortunately when the
USB connection is connected to my computer it prevents the computer from
...18F2550 / 18F4550 USB
CDESC - 2008-04-02 10:05:00
Hello
Anybody ran experiments with the MC 18F4550 or 2550 USB capable controllers
and managed to acchieve good speed? I'm getting about 1000 messages per
second in any mode (bulk, control or interrupt -- HID or not) and wondering
how to get it to speak a little faster.
Thanks
...usb output
steve - 2009-09-20 03:00:00
Anyone know how much voltage a Usb port outputs?
I am trying to recharge a mp3 player via the port, but it takes too
long.
So how much would the player require, in terms of volts, amps etc.
Thanks
Steve
...IR USB device (Igor scheme) problem
Ges - 2007-07-11 08:14:00
Hi!
I've decided to build an IR USB device, based on Igor Cesko's
schematics
http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm
My choice was one with microprocessor.
A guy skilled with electronics build it for me, and tested it in front
of my eyes. On his PC everything worked l...USB Scope Reccomendation (low cost)
vorange - 2007-07-05 00:20:00
Hi,
I am looking for a usb scope which is low cost. Low cost as in
roughly $200 or preferably below. I came across
1) Parallax USB Oscilloscope
http://www.hvwtech.com/products_view.asp?ProductID=118
2) Swordfish
http://www.dontronics-shop.com/product.php?productid=16143
3) ST16...Device on cable
Roger Dewhurst - 2010-08-10 19:12:00
Cables which connect USB ports with peripherals such as cameras
frequently have black cylindrical objects on the cables a few
centimetres away from the USB end. These may be about 10mm in diameter
and 20 mm long. Are these things ferrite beads used to eliminate stray
pulses in the cable or...Re: ULN2803A (darlington array) anyone know what I'm doing wrong?
Don McKenzie - 2006-10-04 16:14:00
Ben wrote:
> I'd need 8 transistors, so a single chip that does the job seemed like a
> good idea.
Spot on Ben,
good work.
Don...
--
Don McKenzie
E-Mail Contact Page: http://www.dontronics.com/e-mail.html
Micro,TTL,USB to 1.5" color LCD http://www.dontronics.co...Re: Is it possible to multiply resistance?
Don McKenzie - 2006-08-25 16:03:00
randomname wrote:
> I know resistors in series simply add up... but is there any way to
> mulitply resistance?
>
> eg: can I take a 10k pot and make it work as if it were a 100k pot?
>
> Thanks,
> -sam
in a word, NO
Don...
--
Don McKenzie
E-Mail Contact Page: ...USB Drive is putting noise on TV?
Homer - 2007-07-31 09:20:00
Hi All,
I have a PVR (something like Tivo) connected to my home theatre system
that can connect to an external USB hard disk for storing movies.
I bought an external hard drive and connected to my PVR and things are
working fine. The only problem is as soon as I connect USB drive (On
or Off) ...Crank powered USB charger?
kiqyou_vf - 2010-02-01 22:08:00
Hello, I would like to build a simple crank powered USB charger. I
have very little experience in electronics, but I think this is how I
would do it:
http://docs.google.com/View?id=df4479zw_145npdcsbmj
Any guidance concerning components types/specifics and general design
would be greatly appr...Re: USB Controllers
Don McKenzie - 2007-10-27 16:10:00
trickyrick wrote:
> Can some one give me a little info about usb controllers I have being
> looking on the net and Im not sure what I should be looking for
> I want to control about 8 relays through my USB port and would also
> need some kind of software program that comes with it.
> Has a...Re: microprocessor circuits
Don McKenzie - 2006-10-28 15:28:00
venkatsr wrote:
> Hi ,I would like to do simple but interesting circuits using
> microprocessors
> Is it possible without a microprocessor trainer kit ?
http://www.dontronics.com/dt006.html
you can build your own version if this suits, as all the info is there,
and demo version basc...Build USB Long Cable
2007-05-27 16:46:00
if I build by my self a USB cable by 4 seperate coaxial cable
together , it's can work over 5 meter?
...USB to PCMCIA Bridge Chip (Component)
Jay,Jeong - 2006-11-24 03:50:00
Hello~
I am expected to develop the mobile equipment as a PCMCIA Type and will
use a core processor like a SoC(System on Chip, ASIC)
Even though this mobile equipment must have a PCMCIA Interface to
connect with host(Notebook), SoC doesn't supply PCMCIA Interface
Signals, but only has USB I...Strange how-to question(s)
Dan Beck - 2008-09-30 16:49:00
Hello all,
I own a vintage (1968) automobile, equipped with a vintage radio. The
previous owner installed slightly more modern speakers. The radio works,
adequately. However, it is not able (of course) to accept my mp3 player as
a signal source. As I stare at the pinout data of a USB co...USB to I2C converter for labview
Marc - 2008-12-17 08:39:00
Hi,
I'm looking for an USB to I2C adapter that I can use with Labview to read
and write to I2C chips?
Are there other developers than National Instruments who make such a
converter (with labview drivers)?
Thanks,
Marc
...USB radio controlled switch.
Control Freq - 2007-09-23 03:21:00
Hi,
Not sure if this is the right BG for this, but here goes.
I have some radio controlled mains electricity switches. Very useful
things around the house.
But, I would really like a similar thing where the switch can be
controlled through my laptop, or PC, possibly through a USB appendage....Does an USB stick gain weight when you put files on it?
Bert Harleman - 2009-12-17 16:03:00
Does an USB stick gain weight when you put files on it?
or to put it a different way:
Are electrons from outside used to store data on an USB stick?
Since I'm quite new to electronics I cannot give a logical explanation.
I searched a lot on the web and I found the folowing data:
• Flas...Surge Protector - how they work?
Kari Laine - 2010-07-18 15:38:00
Hi,
it is the thunder season here in Finland so I got interested how these
surge protectors are built - which say they will save you hardware from
spikes - yeah....
Are there avalanche diodes and coils?
I have a dim feeling I have asked this before...
Best Regards
Kari
--
PIC...Simple electret "pre-amp"
grubertm@gmail.com - 2007-04-30 20:14:00
I am using a Logitech/Labtech USB microphone which is doing an okay
job but could benefit from some more gain. I don't want to touch their
ADC and USB circuit but would prefer adding something in-line. Given
that their 2-wire electret micro is powered by 2.5v on the signal line
what would be a s...Re: Use USB memory stick as random memory?
Bob Monsen - 2008-06-16 23:37:00
"Bill Bowden" wrote in message
news:fade7581-4f17-4fd4-8c68-bef6cfb40eba@y38g2000hsy.googlegroups.com...
> Is it possible to use a little USB flash drive as RAM memory for a PIC
> microcontroller project without a lot of serial I/O software?
>
> How complicated is it?
>
> What proce...Re: Question about static electricity
ian field - 2008-07-09 09:59:00
wrote in message
news:91a1e5b4-dd7a-4511-b82a-cd3d228ce91c@l64g2000hse.googlegroups.com...
> I bought a USB drive, and it came in a small plastic shell package.
> Is it safe to assume that this plastic material is anti-static?
>
> I have not yet opened the package, and I left it sittin...Re: RS422 RJ45 loopback cable
Don McKenzie - 2006-10-20 19:36:00
mike7411@gmail.com wrote:
> I created an RS422 RJ45 loopback cable by connecting pin 1 to pin 8 and
> pin 4 to pin 5.
>
> I also connected a few of the other pins that aren't used since it made
> it easier to line everything up into an RJ45 plug.
>
> However, when I type a letter, ...Help with USB to stereo wire makeup
richg99 - 2008-07-15 18:09:00
I have a radio control transmitter that controls my r/c planes.
I also have a Simulator program ( FMS ) that allows r/c people to train to
fly before crashing too often! Ha !!
The FMS simulator program works fine on my VISTA notebook computer with a
Joystick.
Prior to using this newish co...PIC's and USB
Randy Day - 2008-08-30 20:21:00
I downloaded some stuff on how to use
USB from:
http://pe.ece.olin.edu/ece/projects.html
I want to make a PIC act as an HID
keyboard, but I've come up with a couple
questions before I get too deep into this.
1) Most of the schematics I see show an
external xtal running the clock; is..."USB" Mixed-Signal Scope vs. Digital Storage Scope
2008-08-01 19:34:00
I'm getting into building various hobby projects using
microcontrollers (specifically, the Pic32) and need something to help
me debug the hardware.
Am I better off getting a USB mixed-signal scope, such as this one:
http://www.bitscope.com/product/BS442/
or getting a more traditional digita...I2C monitor
Kari Laine - 2010-08-26 16:27:00
Hi,
I have been thinking about how to connect to I2C bus, so that I can see
whole activity going on. Maybe I should set the max speed requirement to
400k but the highest speed of about 3.5M would be nice.
Those analyzers are very expensive - over $1000. What makes them so
expensive? Would i...