magnetic field

[SMS]

AZ Nomad wrote:

On Sat, 25 Mar 2006 03:52:36 GMT, Yukio YANO <yano@shaw.ca> wrote:


Nice story !! but the Camera actually runs on the Internal Battery . and
none of the quoted nonsense applies.

The AC adapter is magically wired to the battery without any electronics.

Actually, on lithium packs, there is a separate contact for charging
versus discharging. So you can have the situation where the device will
not work without the battery in place, because there is no connection
between the AC adapter and the camera electronics, only to the charging
contact of the battery.

On notebook computers, there are often similar models from the same
manufacturer, with the same power jack, that use different wattage
chargers depending on the CPU. Since low end notebooks often use a high
power desktop CPU, versus the more expensive and lower power notebook
CPUs, some cheaper models may need say an 85W charger, while the more
expensive ones may need a 65W charger. Using the lower power adapter on
the higher power notebook will charge the battery if the notebook is
off, but the lower power adapter cannot operate, or charge the battery,
of the higher power notebook that's turned on (though it will slow the
discharge of the battery).

 

Hello,

Please visit our website for a complete description of author services
www.lonewolfent.net. We offer access to the top editors in the country.
We take none of the money you earn writing your book. Our business is
to sell finished camera-ready files ready to be printed and bound into
a book.

Hope this brief description helps. Please feel free to contact me for
further details.

Sincerely,
Victoria

Victoria Roberts
Acquisitions Administrator
Lone Wolf Enterprises, Ltd.
13 Gurnet Road PMB#300
Brunswick, ME 04011
Phone: 207-725-8251
Fax: 207-725-8385
Email: lweauthors@mfx.net
Web: www.lonewolfent.net

 

[Peter Olcott]

"Jasen Betts" <jasen@free.net.nz> wrote in message
news:7274.4445e3e2.2828a@clunker.homenet...

On 2006-04-18, Peter Olcott <olcott@att.net> wrote:

dry nitrogen? For those time scales, you'll want to remove oxygen, not just
water vapour. Vacuum isn't a good idea, as you'll lose plasticisers and
other chemicals that prolong the life of capacitors,

What about reducing the relative humidity to zero?

if you're using a dessicant that could draw moisture out of the capacitors
afaik electronics doesn't benefit much from low humidity, that's more an
issue with paper.
Would this zero relative humidity damage any of the parts?

and maybe have hazards
that can cause bother in other people's space, but if you have a hermetic
seal with the volume filled with dry nitrogen at atmospheric pressure, you
can't go far wrong, as far as I know.

I can't go to this extreme, what is the next cheaper option?

All you need for that extreme is to borrow a canning machine
and hire a tank of nitrogen

Plastic wrap leaks, aluminised plastic wrap leaks significantly less. but it
still leaks.

Would I be able to continually test for leaks in a regular plastic bag? I can
easily check on these items annually.

The inside of a pringles tube isn't aluminised to make it look good.

a soldered metal canister is probably the ideal.

--

Bye.
Jasen

 

[Luhan]

John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

Initial projects I'd like to try include
- measuring temperature at several points using cheap sensors (maybe
diodes or perhaps AD273s), sensing mains voltage on-off signals
(via opto-isolators?) and possibly liquids flows (if I can find or make a
flow sensor)

- similar to above but driving a small AC pump on and off (optocoupler +
triac or SSR)

- driving a bunch of LEDs on a wand to make a moving text display
(project for the nipper)

I'm looking for something available in the UK.

Looks like a Basic Stamp to me. Just don't know if you can get the
softare for your OS.
You may have to develop it under Windows or Dos - then you can use it
via serial port on any machine you want.

Luhan

 

[Ian MacArthur]

John Stumbles wrote:

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

A quick google should throw up a good assortment of circuits you can
build for programming the 16F flash PIC's, running off a serial port or
more usually hte parallel port of an stock PC. Just a few quid of parts
- I think Maplin even sell a board for that now...

As for target boards - you really don't need all that much - a 16F877 or
similar stuck on a bit of vero board with a crystal and a few caps and
your away - power the whole lot off 4 AA cells, with a dioide or two
inline to drop the supply from 6V down to less the 5.5V and that's it. A
few quid would set the whole thing up.

The 877's probably a reasonable choice for starting ("IMHO", as they
say). It's a 40 pin device, so not small, but has a bunch of digital and
analog i/o's, a uart (albeit TTL rather than RS-232 levels), timers, a
little EEPROM onboard as well as the main Flash. And RAM. Just not very
much of it...

Once you have worked out your design, it's easy to scale it down to one
of the more compact members of the family. They are quite neat.
Used 'em for all sorts of things, MIDI, UARTS, sensors, timers,
SMPTE-Timecode reader... they work.

 

[Martin Gregorie]

John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

Initial projects I'd like to try include
- measuring temperature at several points using cheap sensors (maybe
diodes or perhaps AD273s), sensing mains voltage on-off signals
(via opto-isolators?) and possibly liquids flows (if I can find or make a
flow sensor)

- similar to above but driving a small AC pump on and off (optocoupler +
triac or SSR)

- driving a bunch of LEDs on a wand to make a moving text display
(project for the nipper)

I'm looking for something available in the UK.

Have you looked at the Parallax STAMP systems? http://www.parallax.com/

Available in the UK from: http://www.milinst.com/index.htm
This may not be exactly what you're looking for because, though PIC
based, it is programmed in STAMP Basic (quite a nice integer BASIC and
with good support for both serial and digital i/o).
The normal (and very good) compiler/editor/debugger is a 'doze app (I've
used it) but there is a Linux development package (which I haven't used
yet): http://bstamp.sourceforge.net/

The STAMP has no timers or interrupts but it does debounce inputs, has
built-in pulse generation (great for driving RC servos) and support for
X.10 house bus systems. It has a range of useful prototype boards and
peripherals ranging from serial buss NVRAM to LCD displays.

HTH


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

 

[Tim Auton]

John Stumbles <john.stumbles@ntlworld.com> wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

If you want open-source tools, you might want to look at an AVR-based
board rather than a PIC. There's a port of GCC for the AVR which is
very popular and well supported, so there's plenty of example code out
there. On Windows the port is called WinAVR, but it's just GCC,
binutils and a few other tools bundled up. If you do any Linux C
development, writing in C for an AVR will be very familiar.

I can't recommend a specific 'avr development board' (that's the magic
phrase you need to plug in to a search engine), but finding one with
the features you want won't be hard - it's mostly built-in to the chip
itself. A typical development board is just a voltage regulator,
crystal, RS232 level-shifter (so you can hook the AVR's logic-level
UART to your PC's RS232 level UART), connectors and perhaps a few
buttons and LEDs - plus the chip itself of course. You can just buy
the chip(s) and roll your own on a solderless breadboard if you
prefer.

In addition to the development board, you'll need a 'programmer'. This
attaches to your PC and to the ISP (In-System Programming) header on
the board and lets you reprogram the flash in the AVR. You can also
have a software 'bootloader' running on the AVR, so you can update
your programs over RS232 without using the dedicated programmer. You
still need the programmer to program the bootloader in the first place
though. Programmers can be as simple as a few discrete components
connected to your parallel port (there are many designs available on
the web), or a commercial unit connected via RS232 or USB.

The first Google UK hit (how lazy am I?) finds something which could
well be suitable, the ATmega32 Development Board and AVR ISP
Downloader (they mean programmer) here:

http://www.active-robots.com/products/controllr/active-boards.shtml

Any particular reason for sending all followups to a group to which
you didn't send the original message?


Tim
--
Did I really still have that sig?

 

[gort]

On Fri, 19 May 2006 22:32:34 +0000, John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Have we googled, I don't think we have !!. There are loads of sites
covering pic and one is the Microchip site itself, the people who
actually make pics. I bet you will get thousands of hits at the very least
once you search.

Dave

 

[Kalle Bass]

John Stumbles skrev:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

I found this in the Freebsd ports collection. There are more on google I
suppose.

picasm is a portable assembler which generates code for the 16F84 series of
programmable interface controllers.

WWW: http://www.jmp.fi/~trossi/pic/

This is a FreeBSD port of picp, a command line driver for the Microchip
Picstart Plus development programmer. It is compatible with a variety of
PICs including the 16F84.

WWW: http://home.pacbell.net/theposts/picmicro/

This is Picprog, pic16c84 programmer software for the serial port device.
To program a pic16c84 chip:

picprog --burn --input something.hex --pic /dev/cuaa1

Remember: this is not a production quality programmer! See PIC16C84
data sheet for more information.

Author: Jaakko.Hyvatti@iki.fi
WWW: http://hyvatti.iki.fi/~jaakko/pic/

 

[alexd]

John Stumbles wrote:

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

Linuxdevices.com will give you a pretty good idea of what's on the market...

I'm looking for something available in the UK.

....although not necessarily in the UK.

--
<http://ale.cx/> (AIM:troffasky) (UnSoEsNpEaTm@ale.cx)
10:32:53 up 4:29, 0 users, load average: 0.23, 0.26, 0.11
This is my BOOOOOOOOOOOOOOOOOOOOOMSTICK

 

[Joe]

John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

Initial projects I'd like to try include
- measuring temperature at several points using cheap sensors (maybe
diodes or perhaps AD273s), sensing mains voltage on-off signals
(via opto-isolators?) and possibly liquids flows (if I can find or make a
flow sensor)

- similar to above but driving a small AC pump on and off (optocoupler +
triac or SSR)

- driving a bunch of LEDs on a wand to make a moving text display
(project for the nipper)

I'm looking for something available in the UK.

And you haven't tried uk.d-i-y?

Maplin do a Velleman kit which connects over serial. I've assembled one
and run the demo program but had no time to do more yet. I made a PIC
Christmas tree light controller and a loudspeaker active crossover
controller/monitor seven or eight years ago, but after that long it
will take a while to get the hang of it again. It's not much like perl.

The kit works with quite a range of PICs. Check the Maplin site for
their PIC range then Microchip for what they all do in detail. You
get a 16F627 thrown in with the kit.

I've used Windows as I have most versions laying around. There are basic
GNU utilities, and allegedly Microchip's MPLAB will run under Wine.

 

[Michael]

John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

Initial projects I'd like to try include
- measuring temperature at several points using cheap sensors (maybe
diodes or perhaps AD273s), sensing mains voltage on-off signals
(via opto-isolators?) and possibly liquids flows (if I can find or make a
flow sensor)

- similar to above but driving a small AC pump on and off (optocoupler +
triac or SSR)

- driving a bunch of LEDs on a wand to make a moving text display
(project for the nipper)

I'm looking for something available in the UK.

I am tempted to give a flat "yes" to everything you asked about, except I don't
know what you mean by "play^H^H^H^Hexperiment". Also, while there is no dearth
of open-source DOS/Win tools for PIC, I really don't know about Linux tools.

Microchip's MPASM assembler and MPLab tools are free for the D/L from the
Microchip site.

PICs can be programmed both in- and out-of-circuit using the serial technique
Microchip calls ICSP (In-Circuit Serial Programming). A detailed PDF describing
both board design considerations and some of the low-level details of ICSP can
be D/L from Microchip. Programmers with RS-323 or parallel port interfaces are
availiable, commercial and open-source and amateur designs.

Third-party PIC prototype boards are available but are not cheap, so perfbord,
breadboard, or homemade PCB are also commonly used.

I suggest you spend some time browsing the descriptions of Microchip's PDFs,
particularly the Application Notes (their file names prefixed with "AN"). I
have a ZIP disk that is dedicated to holding the dozens of D/L Application Notes
and PIC spec. documents.

--
Michael

 

[Eamon Skelton]

On Fri, 19 May 2006 22:32:34 +0000, John Stumbles wrote:

Is there a cheap system with a PIC or similar micro:
- with analogue & digital I/O, timers, PWM outputs and other goodies
- which hooks up to a PC via serial, parallel, USB or ethernet
- can be programmed from the PC e.g. into flash
- with open-source tools for writing & loading code & interfacing to it?

PIC1xFxxx + IC socket + Veroboard.

gpasm for assembly, gpsim for simulation and picprog for zapping
the chip.

http://www.gnupic.org/
http://hyvatti.iki.fi/~jaakko/pic/picprog.html

I'm looking for something available in the UK.

Maplin have all you need.

E.S.

--
Linux 2.6.16
Remove 'X' to reply by e-mail.
Yes, my username really is: nospam

 

[John Stumbles]

On Sat, 20 May 2006 07:25:05 +0100, gort wrote:

On Fri, 19 May 2006 22:32:34 +0000, John Stumbles wrote:

Sorry about all the hyphens

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Have we googled, I don't think we have !!.

err ... [guilty mumble] ...

well I knew I'd find more PIC stuff than I could shake a very big
solering iron at, but to distill out the what-I-want from all the
what-there-is would take more intelligence than google's search engine.
(Maybe I need Dilbert's?
http://www.comics.com/comics/dilbert/archive/dilbert-20060516.html)

 

[John Stumbles]

On Sat, 20 May 2006 02:01:14 +0100, Tim Auton wrote:

---8<---

Any particular reason for sending all followups to a group to which
you didn't send the original message?

D'oh!

My newsreader (pan) nagg^H^H^Hprompted me to set a followups but I typed
in the wrong one :-(

 

[Naich]

On Fri, 19 May 2006, John Stumbles wrote:

I want to play^H^H^H^Hexperiment and learn about PIC-type systems, and I
run Linux on my PC.

Have you had a look at http://www.gnupic.org/

Some of your questions might be answered there.

Naich.
--
http://www.fuzzyblobs.com .......... My blurry pics.
http://wwwibbles.co.uk ............. World Wide Wibbles.
http://www.veggiefoodguide.co.uk ... Time for some nice food.
http://www.sodwork.com ............. Right. I've had enough.
Motto: If you can't convince them, confuse them.

 

[JeffM]

I want to play^H^H^H^Hexperiment and learn about PIC-type systems,
and I run Linux on my PC.
John Stumbles

Have we googled, I don't think we have !!.
gort

err ... [guilty mumble] ...
well I knew I'd find more PIC stuff
than I could shake a very big solering iron at
John Stumbles

Don't stop here: http://www.google.com

Expand your horizons: http://groups.google.com

....then narrow your focus:
http://groups.google.com/group/comp.arch.embedded

....then get really serious:
http://groups.google.com/group/comp.arch.embedded/search?q=PIC+Linux&scoring=d

 

[Mike]

In article <1141443374.207913.43150@i40g2000cwc.googlegroups.com>, siliconmike@yahoo.com says...

What certifications are mandatory for export to Europe (EU Countries)
for electronic products

Many are now law and under an EU directive, such as flicker test
and harmonics for 230v 50Hz ac line connected equipment, I use an
HP6813A to provide such tests over here in Western Australia.

- working on 12 volt car battery
- to be fitted inside an automobile
- related to autogas industry

Many disturbance tests are required otherwise the product is going to
be lambasted by any serious competitor thats better cashed up than you.

Especially for any automotive electronic/electrical product you need
at least a couple of disturbance tests, like what happens when there is
a discharge to a cable which is in the same loom as a cable to your
equipment - how does your equipment function (or not) afterwards.

Is CE required ?

In Australia we have 'C tick' which is pretty much only for EMC

What other marks are required ?

There's probably a reference to UL labs equivalent, EU countries would
want to know the product wont catch fire if it gets hot, especially in
presence of gas caused either by its own electronics or a disturbance
test. Though I'm not sure what the equivalent to UL (USA) us in EU.

Is there any auto homologation process required ?

My memory must be bad, can you expand on that, cant find my dictionary

Please help..I need some keywords to start with

If you were in Perth, Id refer you to www.qdl.com.au as they have done a
heap of automotive for shipment to EU.

I'm guessing you are outside Australia, in US perhaps, so check with
the EU industry bodies and speak to UL labs also they will have an idea
and will be most helpful esp if you are exporting US manufactured goods
to EU countries, onwards patriotism <shrug>

Mike.

--
Regards
Mike
* GMC/VL Commodore, Calais VL Turbo FuseRail that wont warp or melt !
* High grade milspec ignition driver electronics now in development
* Twin Tyres to suit most sedans, trikes and motorcycle sidecars
Web site under construction http://niche.iinet.net.au

 

[Pooh Bear]

siliconmike wrote:

What certifications are mandatory for export to Europe (EU Countries)
for electronic products

- working on 12 volt car battery
- to be fitted inside an automobile
- related to autogas industry

Is CE required ?

If it's exclusively Auto, I believe not but there's another regulation you'll
need to meet taht I'm not familiar with. Might vary also if it's intended for
permanent fitment or not.

Graham

 

[no one that you know]

And you are a brokeback bottom poster.

"Roy L. Fuchs" wrote:

On Thu, 08 Jun 2006 01:19:03 GMT, no one that you know
nooneshome@shaw.ca> Gave us:

Why do you say that?

If you do not know the answer, you are more lost than I originally
thought.

My first and many after were V8 currently I have a V10 and two V6's
Triton a 3.8 and a 4.3.

I think you are lying.

You are also a top posting Usenet retard.