PRC as a amplifier in GPS question.

[Phil Allison]

"Tim Polmear" >

**Indeed. For a PROPER science show, just watch Catalyst on ABC. The
viewer
may even learn something.

Yes, but what was wrong with Quantum ((

** Heisenberg's "Uncertainty Principle" caught up with it.




.............. Phil

 

[Caliban]

Donald B Keogh wrote:

...
My solution:

Take a 2 mH aircore inductor from the Bass-Midrange cross-over and
connect it to the secondary of a Scope soldering iron transformer (Can
anyone remember them?) via 1m of speaker cable. The ~4V resulted in
about 6.5A which the coil could take more or less permanently without
overheating.

Sweeping the coil back and forward across the screen a few times did
the degausing for me.


Thanks for the info.

I'm going away for a couple of weeks but will give this a go when I get
back. Jaycar seem to be out of stock of the degaussing wands. I have an
old Weller soldering iron transformer (24V I think), and will build
something similar.

Just one thing, I thought you were supposed to wave the wand in slowly
increasing circles as you move away from the TV.

 

[Gordon W]

Caliban <notreal@dotcom.com> wrote in message
news:d8jka7$2e6b$1@otis.netspace.net.au...

Donald B Keogh wrote:

...
My solution:

Take a 2 mH aircore inductor from the Bass-Midrange cross-over and
connect it to the secondary of a Scope soldering iron transformer (Can
anyone remember them?) via 1m of speaker cable. The ~4V resulted in
about 6.5A which the coil could take more or less permanently without
overheating.

Sweeping the coil back and forward across the screen a few times did
the degausing for me.


Thanks for the info.

I'm going away for a couple of weeks but will give this a go when I get
back. Jaycar seem to be out of stock of the degaussing wands. I have an
old Weller soldering iron transformer (24V I think), and will build
something similar.

Just one thing, I thought you were supposed to wave the wand in slowly
increasing circles as you move away from the TV.

Could an old TV degauss coil be used with low voltage ?

Gordon

 

[Mike Paull]

On Sat, 11 Jun 2005 17:26:12 +1000, "Mr.T" <MrT@home> wrote:

"Kissing Lettuce" <sittinginaninternetcafe@hotmail.com> wrote in message
news:42AA8708.B7E104F4@hotmail.com...
You know there was a time when DSE staff knew a little bit
about electronics

A *very* little bit unfortunately.
But I agree, they know even less now.

I remember a time when they knew alot, because many of them were
enthusiasts, electronics students doing degree/tafe courses after a bit of
extra money and even qualified techies in between jobs... Hmmm, all of a
sudden i feel old

mike

 

[Mike C]

If you want to power your house for an hour from a cap, the cap is likely to
be bigger than the house!

"Franc Zabkar" <fzabkar@optussnet.com.au> wrote in message
news:7lvk815tcjlucid4rhq8avbkseidlhfq6j@4ax.com...

On Wed, 18 May 2005 07:44:57 +1000, "Allan" <allanaws@hotmail.com> put
finger to keyboard and composed:


"Brad Hogan" <brad@pitt.comn> wrote in message
news:428956f8@news.comindico.com.au...

copyrighting:

The word you meant to write is copy-writing.

You actually mean technical writing.


A copy-writer writes the advert or book based on the technical and
design input.

The sentence is actually technical writing, the copy writer just copied
it.



"....It also features an on-board 330uF capacitor so you can store
some
of the energy for later use...."

Its a joke.

Maybe the technical writers decided the joke was to test the
copy-writers...

It must be the new SUPER caps..!!
Power a whole house on a 330 ľf Cap...

:
Allan

Energy stored by capacitor is given by:

E = 1/2 * C * V^2

If this capacitor is to supply 1kW for 1 hour, then:

1000 * 3600 = 0.5 * 330 * 10^-6 * V*V

So V = sqrt( 10^6 * 1000 * 3600 * 2 / 330 )
= 150kV

A 1F supercap would require a voltage of 2.7kV.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

 

[DesertBob Jr.]

Subject: DeserTBoB <dese...@rglobal.net><---STOP THIS SPAMMER!
From: Stephen Worth <n...@vintageip.com>
Newsgroups: alt.collecting.8-track-tapes
Reply-To: n...@vintageip.com
Message-ID: <140620052352259790%news@vintageip.com>
References: <1118577607.233028.143530@z14g2000cwz.googlegroups.com>
<cniua1pm4dq8cop0a4f2ecded066v0kc50@4ax.com>
Organization: VIP Records
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-transfer-encoding: 8bit
User-Agent: Thoth/1.7.1 (Carbon/OS X)
X-Face: ),2'1Ym.e8.})D&e6pUA;\!#,P{32la3Hr<eo6F21}Rm2(z$5BOz$.GU>vVoJ

:cL)j7lL#Zpsps(Mwl*a+v]p2%lIX9QgKm~}IT6[33b^o&l"L0eTAHt3lTA&OT3;*b^V

bA5E>FpE}!h--hJ{$uJ^AxM,{.hb.^+9p]^BzN.kw^.j'gl7Yw#;'YwUoFZ.ChW&~@>7
2}9HN&X)@
Lines: 152
X-Complaints-To: abuse@usenetserver.com
X-Abuse-Info: Please be sure to forward a copy of ALL headers
X-Abuse-Info: Otherwise we will be unable to process your complaint
properly.
NNTP-Posting-Date: Wed, 15 Jun 2005 02:52:26 EDT
Date: Tue, 14 Jun 2005 23:52:25 -0700

Would you folks in the 8track group please contain DeserTBob to your
own group. We would rather have on topic FS notices in
rec.classical.recordings than anti-spam jerks like this. If he had
taken a moment to read our group before posting to it, he would have
known that. But he'd rather spam us just like the spam he complains
about.

 

[David L. Jones]

Mark Harriss wrote:

Hi People,
I recently bought a Z8 Encore XP
microcontrolled dev kit and I'm having
proglems with establishing a connection with
the board itself so I can program the Flash.

i'm using a USB smartcable/dongle to connect
to the board but I'm having trouble finding
setup documentation for jumper settings on the
development board

Can anyone give a few pointers to relevant
docs or directly help me?.

Regards
Mark H

Hope you didn't pay more than $9.95US for the kit:
https://www.soanarplus.com.au/secure/
Just noticed it on Sonars front page.
I know Zilog have always had some of the cheapest dev kits going
around, but this time they are practically giving them away. Guess it's
obvious why!

Dave

 

[Bob Parker]

For what you get, at that price it's a steal! Yesterday I installed
the Zilog software on my work PC (the new 3GHz P4 which was bought in
desperation to try and make Protel 99SE behave), and I had no problems
getting the USB driver loaded and running the Zilog Development Suite.
I'm just sorry that Mark's having so much trouble with the one he
bought. He did later say that he found the jumper setting
documentation. From looking at the included schematic, it's not hard
to work out what the jumpers do and how they need to be set up.
I'm looking forward to seeing what I can do with that tiny
feature-packed 4K micro- when I finally get time.

Regards
Bob


"David L. Jones" <altzone@gmail.com> wrote:

Mark Harriss wrote:
Hi People,
I recently bought a Z8 Encore XP
microcontrolled dev kit and I'm having
proglems with establishing a connection with
the board itself so I can program the Flash.

i'm using a USB smartcable/dongle to connect
to the board but I'm having trouble finding
setup documentation for jumper settings on the
development board

Can anyone give a few pointers to relevant
docs or directly help me?.

Regards
Mark H

Hope you didn't pay more than $9.95US for the kit:
https://www.soanarplus.com.au/secure/
Just noticed it on Sonars front page.
I know Zilog have always had some of the cheapest dev kits going
around, but this time they are practically giving them away. Guess it's
obvious why!

Dave

 

[Mr.T]

"Mike Paull" <mike351@removethis.ozemail.com.au> wrote in message
news:fanta1t46mtrsrvpgp22j2rns3sd0i3rt4@4ax.com...

I remember a time when they knew alot, because many of them were
enthusiasts,

Unfortunately may know less than they think. CB enthusiasts were a common
example. OK if you were after a CB I guess, but usually not much else.
(Not counting real amateurs here, as the ARRL course was worthwhile)

electronics students doing degree/tafe courses after a bit of
extra money

Knowledge will depend on how far they are into the course then obviously.

and even qualified techies in between jobs...

Yes, but that still happens now there are less real jobs.

MrT.

 

[The Real Andy]

On 15 Jun 2005 07:07:42 -0700, posteos-1@hotmail.com (posty) wrote:

Sexy Singles in Your Town
Web Dating with photos. Join Free, Join Now!!!
http://photosexy.cjb.net

Sweet, I'm in!!

 

[Chopper]

Hi all

For what it is worth, I just got my Z8 & took me a while to get it to
communicate with the PC. I accidently found it worked immediately after
switching on the board (D1 PA2 on steady). It did not communicate with the
PC while the demo program was running. It appears to work on both USB1 & 2
although I can't get it to work as yet on a USB2 PCMCIA card in an IBM
Thinkpad
I have J2,J4, J7 in. Others are in the DEMO position

--
Regards

Chopper

<Remove 'Chopper' in Email address>


"Mark Harriss" <billy@blartco.co.uk> wrote in message
news:42a3fbeb$0$258$61c65585@uq-127creek-reader-03.brisbane.pipenetworks.com.au...

Hi People,
I recently bought a Z8 Encore XP
microcontrolled dev kit and I'm having
proglems with establishing a connection with
the board itself so I can program the Flash.

i'm using a USB smartcable/dongle to connect
to the board but I'm having trouble finding
setup documentation for jumper settings on the
development board

Can anyone give a few pointers to relevant
docs or directly help me?.

Regards
Mark H

 

[Chopper]

Hi Mark

I did note that, but I found it still worked with them in. Still coming to
grips with it. Lot more involved than a picaxe08 (which I've also just
started to play with)

BTW noticed date sent 17/06/2005 @ 3:19PM. What time zone are you in??
--
Regards

Chopper

<Remove 'Chopper' in Email address>


"Mark Harriss" <billy@blartco.co.uk> wrote in message
news:42b165dd$0$251$61c65585@uq-127creek-reader-03.brisbane.pipenetworks.com.au...

Chopper wrote:
Hi all

For what it is worth, I just got my Z8 & took me a while to get it to
communicate with the PC. I accidently found it worked immediately after
switching on the board (D1 PA2 on steady). It did not communicate with
the
PC while the demo program was running. It appears to work on both USB1 &
2
although I can't get it to work as yet on a USB2 PCMCIA card in an IBM
Thinkpad
I have J2,J4, J7 in. Others are in the DEMO position



If you look at the schematic you'll see the best settings for the
jumpers: I have j3 out and j6 out so the don't interfere with j4
and j7 respectively.

regards
Mark

 

[Mark Harriss]

The Real Andy wrote:

On 15 Jun 2005 07:07:42 -0700, posteos-1@hotmail.com (posty) wrote:


Sexy Singles in Your Town
Web Dating with photos. Join Free, Join Now!!!
http://photosexy.cjb.net


Sweet, I'm in!!

No, you just want to be , heh heh heh.

 

[Mark Harriss]

Chopper wrote:

Hi all

For what it is worth, I just got my Z8 & took me a while to get it to
communicate with the PC. I accidently found it worked immediately after
switching on the board (D1 PA2 on steady). It did not communicate with the
PC while the demo program was running. It appears to work on both USB1 & 2
although I can't get it to work as yet on a USB2 PCMCIA card in an IBM
Thinkpad
I have J2,J4, J7 in. Others are in the DEMO position

If you look at the schematic you'll see the best settings for the
jumpers: I have j3 out and j6 out so the don't interfere with j4
and j7 respectively.

regards
Mark

 

[Mark Harriss]

Hi Guys, yes it was AUD $16 landed on my doorstep
and I can only get it to run on my NVidia chipset
mainboard by turning off USB 2.0 and running on
USB 1.1 . I've flashed the latest BIOS (which
originally had USB problems) and installed the
latest drivers but it's still dead on USB 2.0

I suspect a driver problem combined with some quirk
in the smartcable implementation as my USB 2.0
memory stick works ok at least.

regards
Mark Harriss

 

[Mark Harriss]

Chopper wrote:

Hi Mark

I did note that, but I found it still worked with them in. Still coming to
grips with it. Lot more involved than a picaxe08 (which I've also just
started to play with)

BTW noticed date sent 17/06/2005 @ 3:19PM. What time zone are you in??

actually it was 9:49 PM my time

 

[Mike Paull]

On Thu, 16 Jun 2005 16:45:03 +1000, "Mr.T" <MrT@home> wrote:

"Mike Paull" <mike351@removethis.ozemail.com.au> wrote in message
news:fanta1t46mtrsrvpgp22j2rns3sd0i3rt4@4ax.com...
I remember a time when they knew alot, because many of them were
enthusiasts,

Unfortunately may know less than they think. CB enthusiasts were a common
example. OK if you were after a CB I guess, but usually not much else.
(Not counting real amateurs here, as the ARRL course was worthwhile)

Enthusiasts of all kinds, CB, Electronics, computers.

electronics students doing degree/tafe courses after a bit of
extra money

Knowledge will depend on how far they are into the course then obviously.

Sure, obviously some were first year and some were nearing the end of their
courses, or had finished and were looking for jobs in their chosen fields.

and even qualified techies in between jobs...

Yes, but that still happens now there are less real jobs.

Guess it does.

MrT.

 

[Alan]

On 8 Jun 2005 06:02:15 -0700, "David L. Jones" <altzone@gmail.com>
wrote:

Mark Harriss wrote:
Bob Parker wrote:
Geez, they sure don't make it easy, do they? Zilog's desperately
trying to claw back market share, and this kind of needless problem is
going to lose them lots of potential customers.
Good luck with sorting through the mess. It'll be interesting to
get your thoughts about the Encore once you can actually use the
thing.

Regards
Bob


I fixed the problem!!! : I switched to Atmel instead.

Atmels certainly ain't the ducks guts either.

You can easily lock up their ISP port making the chip useless in any
serial programmer. Just what you need when you have a part soldered
onto the board - real nasty.
Their ATtiny26 device wasn't compatible with their own development
system either - needed modifications, and wasn't adequately documented.


I certainly had a very unpleasant introduction to Atmels.

Dave

The main problem I've had with the Atmels (Mega16 and Mega32) has been
the oscillators switching to external - which effectively makes them
dead as far as a serial programmer is concerned.

Simple solution - inject an oscillator into XTAL1 and change the
lockbits.

Alan

--
++++++++++++++++++++++++++++++++++++++++++
Jenal Communications
Manufacturers and Suppliers of HF Selcall
P O Box 1108, Morley, Western Australia
Tel: +61 8 9370 5533 Fax +61 8 9467 6146
Web Site: http://www.jenal.com
Contact: http://www.jenal.com/?p=1
++++++++++++++++++++++++++++++++++++++++++

 

[Ed -|-]

Hmm!!

so a 1F cap charged to 0.75V will supply 100W motor for 1 second?

hmm, doesn't look correct

btw
I'm thinking of a regenerative braking system for a electric scooter.

 

[mel]

I can email you a simple circuit if you like
Mel


"NormL" <None@nowhere.com> wrote in message
news:d7p8vr$n39$1@domitilla.aioe.org...

I found this very helpful.. http://www.cpemma.co.uk/index.html


"Markus Stone" <markusm@alphalink.com.au> wrote in message
news:429d9ac0@news.alphalink.com.au...
Hi all;

I've got 2 PC fans (12V dc running from a 500mA rated supply). Thing is,
whenever I try to use a pot to control their speed, the pot starts
smoking.

This has just got to be possible, but everything I try just smokes the
pot.

How can I control the fans with a 1/4 watt pot? do I use a transistor
and
use the tranny to control the base current, thereby avoiding the power
dissipation issues?

Thanks

-Markus