I'm trying to decide whether it would take less time to make a new
RFID reader using an antenna from an existing unit as well as using
the code (to produce the fsk signal) as well as the circuit used to
match the antenna's resonant frequency. The existing unit is made of
an antenna made out of coils of lacqured copper wire. There is an
existing unit including the firmware codes for the microcontrollers on
the unit, but it doesn't talk properly anymore to the computer. It's
also built for a slightly different purpose too. It's built to
periodically check for the presence of a tag and then report to the
host computer. I'm trying to get it to communicate either to another
microcontroller, or to the host pc and have it coordinate between
talking to two separate microcontroller systems. I'm also thinking of
building a new one with a separate microcontroller system or RFID
reader, adapt the code used for the existing system and have it to
talk to the host computer. I'm wondering in your opinion, based on the
information that I have found so far, whether fixing the current
system in terms of hardware and firmware-wise despite its reliability
issues or building a semi-new one adapting some of the circuits and
code of the existing reader would be the easier and more reliable
solution. Sorry if I still sound vague, but your views would be much ...

http://www.ok-shopping.com/

Ok-shopping.com was founded in 2003, which is an on-line shop that
offering high quality battery and charger for digital camera and
camcorder, We also supply adapter too.

Ok-shopping.com is proud to offer best price with high quality product
to our customer as in the best effort on all our professional staffs.
We warrant that the products sold in our website, other than
explicitly stated, are 100%% brand new and free from defects in
material and workmanship.

We specialize in laptop battery, camcorder battery, digital camera
battery, battery charger, power tools battery, PDA battery and laptop
AC / DC adapter for hundreds of camcorders and cameras manufacturer,
e.g. Canon, Casio, Fujifilm, JVC, Kodak, Nikon, Olympus, Panasonic,
Samsung, Sony and so on, Each model was engineered for maximum run
time so you won't miss those important shots. We provide products of
great value for our customers and aim to develop a large client base.

The group can't post image, can it?
It's not convenient for explanation.

Along the lines of the question regarding LTspice logic levels...

PSpice has a number of nice digital stimulus "parts", but they kick
out _very_fast_ edges at 0-5V logic levels when connected to analog
parts.

So, in this past week, I have created some stimulus-level-to-analog
parts with adjustable levels and rise and fall.

Likewise analog back to 5V logic.

That way I can patch in 74HC stuff just for behavioral analysis...
speeds things up before I go full device-level in the chip design.

Any PSpice users that are interested, I'll send you copies for your
symbol libraries... PSpice Schematics only... Capture sucks the big
lemon ;-)

Having had my emails ignored and being unable to find intelligent life
in the Winbond/Nuvoton phone system - is it possible to do automatic
power up message looping with the new ISD17xxx series of chipcorders
ie apply power and the chip plays the single recorded message (which
may not occupy the entire memory space) seamlessly forever (or until
the power is removed).
cheers, m

On Thu, 4 Sep 2008 10:54:44 -0700, "ISQED" isqed.org> wrote:

[snip]

Another fricking IEEE group created by fairies ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | 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 |

It's what you learn, after you know it all, that counts.

One add after the other for digital photo frames, pdf book readers,
one even more expensive then the other (500 Euro???), so I thought "
have a lot of jpg pictures, why not put a eeePC in the living room as digital photo frame,
and have the main PC send the slide show?"

So of course everything crahed or did not work (this confirms John Larkin's
ideas that all soft is broken ;-) ), especially when I wanted to mix BW and color jpegs..

So wrote something myself, Linux users (MS users need to upgrade to Linux):
http://panteltje.com/panteltje/jpg_to_mjpegtools_yuv/

Call for Papers

ISQED 2009, 10th Anniversary of International Symposium on
QUALITY ELECTRONIC DESIGN

March 16-18, 2009. DoubleTree Hotel, San Jose, CA, USA
http://www.isqed.org

Paper Submission Deadline: Oct. 17, 2008
Acceptance Notifications: November 24, 2008
Final Camera-Ready paper: January 2, 2009

A pioneer and leading multidisciplinary conference, ISQED accepts and
promotes papers related to the Electronic Design, manufacturing, and EDA.
Authors are invited to submit papers in the various disciplines of circuit
design, high level design, test & verification, design automation tools;
processes; flows, device modeling, semiconductor technology, and advance IC
packaging. A list of topics include:

1. Manufacturing, Semiconductor Technology and Devices
1.1 Design for Manufacturability/Yield & Quality (DFM/DFY/DFQ)
1.2 Effects of Technology on IC Design, Performance, Reliability,
and Yield (TRD)

First time for me to do mixed mode sims on LTSpice. How do you change
the voltage level of behavioral logic such as "AND" from the default 1V
to some other voltage?

Maybe even other parameter such as rise/fall times, prop delays?

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

... as http://www.tinaja.com/glib/enhebay7.pdf

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--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com