PRC as a amplifier in GPS question.

[grames]

"Boz" <iboswell(spam not)@hotmail.com> wrote in message

....be VERY careful about the installation......

Boz

Mike Harding mike_harding1@hotmail.com> wrote:

Agreed - too dangerous to mess around with. Lot of safety aspects
to be considered - in hardware as well as software

Mike Harding

I hear and appreciate your concerns but would really like to have
a go at it anyway. Over the years I have fitted quite a number of
cruise controls and understand the saftey considerations.
It's got more to do with wanting to learn by doing than the result.

Thanks, Grames

 

[Mike Harding]

On 23 Jul 2003 16:35:12 -0700, grames@telstra.com (grames) wrote:

I hear and appreciate your concerns but would really like to have
a go at it anyway. Over the years I have fitted quite a number of
cruise controls and understand the saftey considerations.
It's got more to do with wanting to learn by doing than the result.

There is a big gap between fitting ready made products
and designing those products.

Why not do a prototype system using an electric motor
and a speed sensor. If you can figure out a way to
apply variable loads to the motor you can develop
the control loop on the bench and that will be a lot
easier (and safer!) than trying to debug hardware/software
in a car.

I appreciate and applaud your desire to learn and a
control system is a good learning exercise but I think
you will find it a more difficult task than you anticipate
hence my suggestion to develop the first stage on
the bench.

Mike Harding

 

[Ken Taylor]

"Zane Jones" <sick@of.spam> wrote in message
news:1059007105.456067@drone5.qsi.net.nz...

Hi I am building a home automation controller which can be remotely
operated
via telephone. I was just wondering if someone could help me.

I have a DTMF decoder circuit for receiving DTMF tones and microcontroller
output. That part is working fine. What I need to do is send an analog
signal back to the remote end to let the user know that the operation was
successful or if it wasn't.

Does anyone know what I must do to send this analog signal. i.e voltage
restrictions e.t.c or can I just generate a signal and send it directly.

Assuming you're using acoustic coupling anyway (how *do* you interface tot

he phone?) just send a DTMF tone(s) back. DTMF generators are equally easily
bought.

Ken

 

[Zane Jones]

I am looking at using a Philips PCD3311C DTMF/MODEM/Musical Tone
generator. I will send the digital data to the generator via the uC. What I
really need to know is what needs to be connected to the analog output of
the IC or can I just directly connect it to the line.


"Ken Taylor" <ken123@xtra.co.nz> wrote in message
news:bfnag7$gbbmd$1@ID-76636.news.uni-berlin.de...

"Zane Jones" <sick@of.spam> wrote in message
news:1059007105.456067@drone5.qsi.net.nz...
Hi I am building a home automation controller which can be remotely
operated
via telephone. I was just wondering if someone could help me.

I have a DTMF decoder circuit for receiving DTMF tones and
microcontroller
output. That part is working fine. What I need to do is send an analog
signal back to the remote end to let the user know that the operation
was
successful or if it wasn't.

Does anyone know what I must do to send this analog signal. i.e voltage
restrictions e.t.c or can I just generate a signal and send it directly.

Assuming you're using acoustic coupling anyway (how *do* you interface tot
he phone?) just send a DTMF tone(s) back. DTMF generators are equally
easily
bought.

Ken

 

[John Crighton]

On Thu, 24 Jul 2003 10:00:27 +1000, Mike Harding
<mike_harding1@hotmail.com> wrote:

On 23 Jul 2003 16:35:12 -0700, grames@telstra.com (grames) wrote:

I hear and appreciate your concerns but would really like to have
a go at it anyway. Over the years I have fitted quite a number of
cruise controls and understand the saftey considerations.
It's got more to do with wanting to learn by doing than the result.

There is a big gap between fitting ready made products
and designing those products.

Why not do a prototype system using an electric motor
and a speed sensor. If you can figure out a way to
apply variable loads to the motor you can develop
the control loop on the bench and that will be a lot
easier (and safer!) than trying to debug hardware/software
in a car.

I appreciate and applaud your desire to learn and a
control system is a good learning exercise but I think
you will find it a more difficult task than you anticipate
hence my suggestion to develop the first stage on
the bench.

Mike Harding

Hello Grames,
just following on from what Mike said about building
something on the bench. Why don't you whip out
the faulty unit and repair that one on the bench?
You will still learn a lot by doing that.
I am assuming the components are not potted
with the part numbers rubbed off.
Regards,
John Crighton
Hornsby

 

[David]

"Zane Jones" <sick@of.spam> wrote in message
news:1059007105.456067@drone5.qsi.net.nz...

Hi I am building a home automation controller which can be
remotely operated
via telephone. I was just wondering if someone could help me.

I have a DTMF decoder circuit for receiving DTMF tones and
microcontroller
output. That part is working fine. What I need to do is send an
analog
signal back to the remote end to let the user know that the
operation was
successful or if it wasn't.

Does anyone know what I must do to send this analog signal. i.e
voltage
restrictions e.t.c or can I just generate a signal and send it
directly.

Simplest answer - go and get a Pascom Redback RB02.1 telephone
line interface. This will take care of most problems associated
with electrical isolation and matching to the PSTN.

 

[Rod Speed]

Mark Harriss <ningauble@bigpond.com> wrote in message
news:YHGTa.10891$OM3.2528@news-server.bigpond.net.au...

I was burning a CDROM image (Disc Wizard) when
my ACER burner died from a fault (less than 50 cd's).
Now windows tells me the harddisk I was using, a
Seagate ST32140A is either not accessable or is locked.

Looks like it wasnt just the burner that died.

Try running Seagate's diagnostic on the drive.

I can access it in DOS ok but can't then run
windows without a crash. Linux just accesses
the drive as per normal with no problems at all.

Probably just because its using
stuff off a different part of the drive.

Most likely you have some bad sectors now.

 

[Rod Speed]

You're sposed to use groups.google in that situation.
http://groups.google.com/groups?threadm=3f1c647c%241%40news.alphalink.com.au

Here is the answer again.


Pyrrhic <sknox@alphalink.com.au> wrote in message
news:3f1c647c$1@news.alphalink.com.au...

I have a 68cm Blaupunkt that's about 10 years old, and lately there's
a patch of screen (top left) that's purplish - it's faint but it's there. I've
been moving a lot of gear around in my living room in the last few weeks
due to new carpets going down, and there's a large speaker to the
side of the TV cabinet I've had to shift and replace a few times. The
speaker cones themselves are very large and heavy so would have a fair
magnetic field to maybe affect the TV - do you think the patch on the TV
that's recently come up could be removed by degaussing the screen?

Very likely. Particularly as its showed up after moving things around.

Or does the patch mean my TV (only
had it six months) is on the way to the tip?

Very rare for TVs to fail like that. Its almost always an external
field thats the problem, occasionally the internal auto degausser
on turnon has had the thermistor fail, but thats not as likely given
that the problem showed up with moving stuff around. Its possible
its been dead for a while tho and you've only seen the effect of
that when you moved the speakers around. You should be able
to have that fixed cheaply, or just use an external degausser.

I know TVs don't last forever and a decade is a big slice of a TV's life, but
it's a great set otherwise and is in great condition (teletext/stereo etc).

Certainly worth getting it degaussed or even the thermistor replaced.
It may not have died tho, it may not have ever had that much
degaussing power and cant handle what those speakers produce.

The Commodor 1701 monitors are absolutely notorious
for that effect. Its no big deal when they are used as
TV monitors coz you really only notice it on the blue
screen when the VCR blanks the output etc.

 

[Mark Harriss]

Rod Speed wrote:

Looks like it wasnt just the burner that died.

Try running Seagate's diagnostic on the drive.

I can access it in DOS ok but can't then run
windows without a crash. Linux just accesses
the drive as per normal with no problems at all.

Probably just because its using
stuff off a different part of the drive.

Most likely you have some bad sectors now.

Hey Rod, long time no see. As far as I can
tell, the drive data is ok: it's a DOS/Win98 formatted
disk but Linux is set up to read it as FAT32 drive
and can access all of the files with no probs,
so it's using the same sectors on the disk, just
win98 refuses to read it and claims it's locked
out by software already using it.

I'll have a look at Seagates site like you suggest
and see what i can download.

 

[Trevor Wilson]

"Mr tubeamps" <tube_guyau@optusnet.com.au> wrote in message
news:3f1fa205$0$31923$afc38c87@news.optusnet.com.au...

just got hold or this meter
and now looking for info on
how to use it.
or user guide of some sort

**Very straightforward. Pretty much like every other N&D meter of the time.
Stick a signal into the DUT (Device Under Test). Set the 'Set Ref' switch to
maximum attenuation. Set the 'Meter Range' to 100%. Select the 'Rejection
Frequency' switch to approximately the frequency you're testing. Set the BIG
KNOB to close to the required frequency. Set all the 'Rejection Balance'
controls to their central positions. Press the 'Set Ref' push button switch
to ON. Adjust the DUT to the appropriate level. Adjust the 'Set Ref'
(rotary) switch and pot so the meter reads '10' Switch the 'DISTN' switch to
ON. Adjust the BIG KNOB so the meter dips. Switch the 'Meter Range' switch
so the meter comes up again. Adjust the BIG KNOB again. When the 'Meter
Range' switch is somewhere between 3% and 10%, you can begin using the
'Rejection Balance' controls. Start with the left hand pair and work your
way across to the right hand set (<0.1%), whilst increaing sesitivity, using
the 'Meter Range' switch. When your meter is reading as low as you can get
it, that is your N&D level.

Simple, eh?


--
Trevor Wilson
www.rageaudio.com.au

 

[Pyrrhic]

Thanks for reposting the info Rod, much appreciated. I thought that I might
have bought a pup.

Steve

Rod Speed <rod_speed@yahoo.com> wrote in message
news:bfnrfa$gjgs2$1@ID-69072.news.uni-berlin.de...

You're sposed to use groups.google in that situation.

http://groups.google.com/groups?threadm=3f1c647c%241%40news.alphalink.com.au

Here is the answer again.


Pyrrhic <sknox@alphalink.com.au> wrote in message
news:3f1c647c$1@news.alphalink.com.au...

I have a 68cm Blaupunkt that's about 10 years old, and lately there's
a patch of screen (top left) that's purplish - it's faint but it's
there. I've
been moving a lot of gear around in my living room in the last few weeks
due to new carpets going down, and there's a large speaker to the
side of the TV cabinet I've had to shift and replace a few times. The
speaker cones themselves are very large and heavy so would have a fair
magnetic field to maybe affect the TV - do you think the patch on the TV
that's recently come up could be removed by degaussing the screen?

Very likely. Particularly as its showed up after moving things around.

Or does the patch mean my TV (only
had it six months) is on the way to the tip?

Very rare for TVs to fail like that. Its almost always an external
field thats the problem, occasionally the internal auto degausser
on turnon has had the thermistor fail, but thats not as likely given
that the problem showed up with moving stuff around. Its possible
its been dead for a while tho and you've only seen the effect of
that when you moved the speakers around. You should be able
to have that fixed cheaply, or just use an external degausser.

I know TVs don't last forever and a decade is a big slice of a TV's
life, but
it's a great set otherwise and is in great condition (teletext/stereo
etc).

Certainly worth getting it degaussed or even the thermistor replaced.
It may not have died tho, it may not have ever had that much
degaussing power and cant handle what those speakers produce.

The Commodor 1701 monitors are absolutely notorious
for that effect. Its no big deal when they are used as
TV monitors coz you really only notice it on the blue
screen when the VCR blanks the output etc.

 

[Rob]

What about calling your local HP service centre. If you can get past the
front desk and talk to the techs they may be able to locate / keep some
useful parts for you.

 

[John Crighton]

On Thu, 24 Jul 2003 19:47:53 +1000, "Nick" <nscholz@optushome.com.au>
wrote:

Hey all,

I'm doing a project and I need to get my hands on some stepper motors as
cheaply as possible. I've been told that old HP LaserJet I, II and III's
have the kind of stepper motors in them that I need ( 100oz-inch holding
torque and 200 steps). I was wondering if anyone had any idea of where I'd
find unwanted/broken old laser printers from which I could salvage the parts
I need?.
I've been around to printer repair shops and most of them either keep the
printers for
their own use or have recently chucked all there old ones out
Alternatively are there
any other old machines out there that would have the steppers motors I need?

Failing that, could anyone point me in the direction of any Australian shops
(in brisbane area, or that do mail order) that sell such stepper motors.
Most of the places I have found on the net are in America.

Thanks for your help,

Nick

Hello Nick,

here is a place with some stepper motors
http://www.oatleyelectronics.com/stepper.html

Does it have to be a laser printer?
Can't you use the stepper motors
out of other old printers in general?

I bet if you were to knock on every door of an industrial
unit/complex and ask for "any old printers" that you
would come away with a few.

Regards,
John Crighton
Sydney

 

[happyhobit]

If it's not the drive problem and it's not a Dos problem than it's a Windoz
problem. Reload Windoz

Jay

"Mark Harriss" <ningauble@bigpond.com> wrote in message
news:YHGTa.10891$OM3.2528@news-server.bigpond.net.au...

I was burning a CDROM image (Disc Wizard) when
my ACER burner died from a fault (less than 50 cd's).
Now windows tells me the harddisk I was using, a Seagate
ST32140A is either not accessable or is locked.

I can access it in DOS ok but can't then run windows without
a crash. Linux just accesses the drive as per normal with
no problems at all.

 

[Alex]

put in a win98 boot disc, and run scandisk on the drive.
There is also a possibility that the windows registry is corrupt.

failing everything, a fresh install of windows should correct the problem.

alex.

"Mark Harriss" <ningauble@bigpond.com> wrote in message
news:GJNTa.11864$OM3.3658@news-server.bigpond.net.au...

Rod Speed wrote:


Looks like it wasnt just the burner that died.

Try running Seagate's diagnostic on the drive.

I can access it in DOS ok but can't then run
windows without a crash. Linux just accesses
the drive as per normal with no problems at all.

Probably just because its using
stuff off a different part of the drive.

Most likely you have some bad sectors now.


Hey Rod, long time no see. As far as I can
tell, the drive data is ok: it's a DOS/Win98 formatted
disk but Linux is set up to read it as FAT32 drive
and can access all of the files with no probs,
so it's using the same sectors on the disk, just
win98 refuses to read it and claims it's locked
out by software already using it.

I'll have a look at Seagates site like you suggest
and see what i can download.

 

[John West]

I'm a Hp service agent, I have more bucket loads of canon engine related
shit than I can poke a stick at.

Where are you ?

"Nick" <nscholz@optushome.com.au> wrote in message news:3f1fab4e$0$1208
$afc38c87@news.optusnet.com.au...

Hey all,

I'm doing a project and I need to get my hands on some stepper motors as
cheaply as possible. I've been told that old HP LaserJet I, II and III's
have the kind of stepper motors in them that I need ( 100oz-inch holding
torque and 200 steps). I was wondering if anyone had any idea of where
I'd
find unwanted/broken old laser printers from which I could salvage the
parts
I need?.
I've been around to printer repair shops and most of them either keep the
printers for
their own use or have recently chucked all there old ones out
Alternatively are there
any other old machines out there that would have the steppers motors I
need?

Failing that, could anyone point me in the direction of any Australian
shops
(in brisbane area, or that do mail order) that sell such stepper motors.
Most of the places I have found on the net are in America.

Thanks for your help,

Nick



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.490 / Virus Database: 289 - Release Date: 16/06/2003

 

[Ken Taylor]

"Eric" <someone@clear.net.nz> wrote in message news:3f1fb1a8@clear.net.nz...

And the punch line......?

 

[Bob Parker]

Personally I don't think that was very funny.


"Eric" <someone@clear.net.nz> wrote:

A major earthquake, measuring 9.1 on the Richter Scale has hit New Zealand
this morning. 350,000 New Zealanders are missing, and over 100,000 have been
reported injured. The country is totally ruined and the government doesn't
know where to start with providing assistance.



The rest of the world is in shock:



Canada is sending troops to assist the country.



The USA is sending food, medical aid and money.



France is sending doctors, nurses and medical supplies.



Russia is sending tents and warm clothing.



Australia is sending 350,000 replacement Kiwis.

Hate spam? Go to http://www.bluebottle.com (It's free)

 

[Mainlander]

In article <bfooq6$jqn$1@otis.netspace.net.au>,
denisand@netNOSPAMspace.net.au says...

In news:YHGTa.10891$OM3.2528@news-server.bigpond.net.au,
Mark Harriss <ningauble@bigpond.com> wrote these words:

| I was burning a CDROM image (Disc Wizard) when
| my ACER burner died from a fault (less than 50 cd's).
| Now windows tells me the harddisk I was using, a Seagate
| ST32140A is either not accessable or is locked.
|
| I can access it in DOS ok but can't then run windows without
| a crash. Linux just accesses the drive as per normal with
| no problems at all.

Your friend and mine, www.google.com gives a few pointers to what may be
the problem, one of which is
http://www.ts-consulting.net/locked%20drive.htm

Seems possible the burner program might lock the data to prevent it from
being changed by another process?

 

[Daniel Franklin]

Eric wrote:

Australia is sending 350,000 replacement Kiwis.

Well that's about as funny as Ebola.

- Daniel
--
******************************************************************************
* Daniel Franklin - Postdoctoral research fellow, TITR Institute
* University of Wollongong, NSW, Australia * d.franklin@ieee.org
******************************************************************************