PRC as a amplifier in GPS question.

[Phil Allison]

"Bob Parker"
"Phil Allison"

See http://www.priceisrightinfo.com/ for all the info on my daytime
job!!

** ROTFL !!

Had no idea you were the "matinee idol" type !!




......... Phil

 

[Andrew McMeikan]

Andy wrote:

Hello,

I am trying to track down some DC to DC converters with the following
specs:
Input: 10-30V
Output: 13.5 - 15.0V @ 3-4A

No need for a complete packaged item as it will be part of a larger
project. I have had a bit of a snoop around however I haven't found
anything suitable so far. Cost is a major factor with this one.

Thanks in advance for any info.

Regards,

Andy (Change "agw" to "andy" to reply by email)

What about an lm2576 with a pass transistor for extra amps?

 

[B J Foster]

there's only one thing stupider than a troll...

Mick wrote:

"two bob" <tb@department9.com.au> wrote in message
news:4401611c$1_1@news.iprimus.com.au...

he will go away when you stop feeding him

He wont go away, just like the pacific ocean wont go away. Treat it like a
bad joke and go with the flow



Alas they haven't invented a cure for stupidity otherwise JPT would have vanished
long ago.

 

[Terry Given]

Bob Parker wrote:

It's a pulse measurement which gives similar results to about a 100kHz
sine wave measurement.

Regards
Bob


On Sun, 26 Feb 2006 13:29:55 +1300, Terry Given <my_name@ieee.org
wrote:

Hi Bob,

what frequency do you test ESR at?

Cheers
Terry

Hi Bob,

thanks. the pulse width is not clear from the schematic or associated
waffly story. thats a pretty handy gadget, every test tech ought to have
one (and its a fair few dB less than my network analyser)

Cheers
Terry

 

[swanny]

- = krusty = - wrote:

Hi All,

I'm trying to find a part number for the following device:

It is a card reader of sorts, and somebody once mentioned that it might work
by using IR. I'm not too sure. The cards have no magstripe etc (look a bit
like mifare cards), however this device is about 10 - 15 years old, so I
don't think it works on prox.

Pics can be found here:
http://www.ainslie.co.za/DSC03695.JPG
http://www.ainslie.co.za/DSC03696.JPG
http://www.ainslie.co.za/DSC03697.JPG

Any help would be much appreciated!!

Thanks
Chris.



It might be a barcode reader. These use IR to read a barcode laminated

into the card. The pictures don't show the read head clearly. You should
be able to see whether it is magnetic or IR by looking at it.
No clues as to manufacturer inside the unit?

 

[Anthony Fremont]

<b.clarke@persona.ca> wrote in message
news:1141132967.091449.239070@i40g2000cwc.googlegroups.com...

Basically what I want to do is use the output pins of my PIC to
activate some transistors. If i understand correctly, activating a PIC
pin essentially grounds it, so an NPN won't work. I am assuming then I
need to use a PNP, so when it is grounded, it activates the "switch".

Most PIC output pins are "totem pole", meaning that they can source and
sink current. An NPN will work fine with a PIC.

Now, does it matter what is going through the collector and emitter? I
would like to have a Positive voltage sitting on one side of the
transistor, and the other side of the transistor would go to an ECU in
a vehicle. Under most circumstances, the transistor will be
ungrounded,
which should mean that there is no flow through the transistor, and no
signal to the ECU (that is what I want). When instructed, the PIC will
ground the base, allowing current to flow through the transistor and
sending the positive signal from the other side of the transistor to
travel to the ECU. Basically it is -
http://wotid.com/tls/images/ssatre/transistor_tre.jpg - but the
transistor would be activated by a PIC.
Maybe I am missing something, but I cannot get this work no matter
which I use PNP, or NPN.
Is anyone able to shed some light on this for me?

If you want the transistor to "be on top" (meaning between the battery
and the device being switched) and supply the positive voltage to a
device, then you usually want a PNP type. The problem is that you need
to pull the base higher than the collector to switch it off. If you are
using a PIC with 5V outputs and trying to switch 12V, you have a real
problem. Never fear, the manufacturers have already solved it for you
though. What you want is a "high side driver". This is something like
a P-channel MOSFET with a built in charge pump to be able to pull the
gate (base equivalent) up to a high voltage, but using a logic level
input. Take a look at the VN820.

OTOH, your schematic clearly shows a low side switch. Many NPN type
transistors would be able to do this with relative ease.

 

[Rudolf]

Simply ingore him. If noone will get into discussion with him, hopefully he
will get bored eventually.

Rudolf

"valiumboy" <pussynuts@bigpond.com> wrote in message
news:GiTLf.15763$yK1.1541@news-server.bigpond.net.au...

hi all, how do you killfile turdcad.i am sick of seeing this crap.
cheers
joe

 

[Phil Allison]

"The Real Andy"

That was pathetic.. (slight chuckle)

** Bet you missed the joke.




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

 

[Russ_Verdon]

Your other option is shorten the cable inside the power supply. Desolder
each wire where it enters the power supply circuit board, shorten to length
and resolder back in place. If you do one at a time you shouldn't get into
trouble. This way you don't have to worry about the connector at all!
This assumes you have reasonable soldering skills and check that uou don't
cause any solder bridges.


Regards
Russell

"Sean Lincolne" <usenet09@seantech.com> wrote in message
news:44053f54$0$30903$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

Can anyone recommend a supplier of unused 20 pin ATX connectors ?

I'm building a computer in a case based around a VIA ITX board, and
rather than use the standard connector that came with the DC-DC
converter, I want to reterminate my own.

My aim is to avoid having any slack cable inside to save space and avoid
any airflow problems.

There's nothing listed on DSE, Jaycar, or Altronics, and I could not
find anything useful on Farnell's web site.

There seem to be a lot of people selling just the nylon bit (case
modders mainly).

Can anyone suggest an Australian source ? Even just the pins (albeit
the little buggers are square and rare) would be great.

Please reply to this newsgroup - the reply email address does not work.

Thanks,

Sean

 

[dmm]

On 1 Mar 2006 13:11:40 -0800, "David L. Jones" <altzone@gmail.com> wrote:

Just saw an ad for a new show on CH9 called "Clever" due to start
Sunday night.
Looks like a Mythbusters/Brainiac style show with a bit of Guiness
World Records thown in.
"How to beat a speed camera while doing 300km/h" is one of the gems.
What are the odds it's be a total shocker?
Appologies for inferring Brainiac is in the same catergory as
Mythbusters!

Dave

Seen it. It's not that interesting. Geogie Parker couldn't control herself.
Then again.... 8)

 

[Ken Taylor]

dmm wrote:

On 1 Mar 2006 13:11:40 -0800, "David L. Jones" <altzone@gmail.com> wrote:


Just saw an ad for a new show on CH9 called "Clever" due to start
Sunday night.
Looks like a Mythbusters/Brainiac style show with a bit of Guiness
World Records thown in.
"How to beat a speed camera while doing 300km/h" is one of the gems.
What are the odds it's be a total shocker?
Appologies for inferring Brainiac is in the same catergory as
Mythbusters!

Dave


Seen it. It's not that interesting. Geogie Parker couldn't control herself.
Then again.... 8)


Aha. And we all watched "Baywatch" for it's gripping content. Hmmm, may

rethink choice of words.....

Ken

 

[budgie]

Just *how* short is suitable?

 

[Mr.T]

"David L. Jones" <altzone@gmail.com> wrote in message
news:1141277601.400810.307720@j33g2000cwa.googlegroups.com...

Mr.T wrote:
"Phil Allison" <philallison@tpg.com.au> wrote in message
news:46mpgiFbta2kU1@individual.net...
Looks like a Mythbusters/Brainiac style show with a bit of Guiness
World Records thown in.

** It is not really like any of those .

Almost all the stunts have been taken directly from Brainiac so far.
Blowing
up caravans with static electricity, and walking on custard are just two
examples.

In that case it is a direct ripoff, I have seen both of those stunts on
Brainiac.
That's seriously lame.

Agreed. I won't be watching it any more.

** It's better than the mindless "Brainiac".

Far worse IMO. Both have exactly the same crappy experiments. However
the
stupid game format adds nothing at all in "Clever", but the Brainiac
girls
provided the only reason to watch either show

It made me watch a few times but the novelty wore off :-

Agreed, and they even cut the girls out when they shifted it to an earlier
time slot anyway.

Brainiac was seriously bad.

Agreed, but not nearly as bad as "Clever".

Mythbusters is still compulsive viewing. Even if they get it
technically wrong sometimes,

Sometimes?
What they desperately need is some real scientists on the team, and proper
research.
Revisiting the same myth three times, and admitting they were wrong the
first time, is not really that good IMO.

the characters are great fun, and the stuff they build is cool.

Yes, would be a great show with a bigger budget and some real science. In
the meantime they have fun blowing up things at other peoples expense.
Good luck to them!

MrT.

 

[David L. Jones]

Mr.T wrote:

Brainiac was seriously bad.

Agreed, but not nearly as bad as "Clever".

I'll stick on a DVD instead I think.

Mythbusters is still compulsive viewing. Even if they get it
technically wrong sometimes,

Sometimes?
What they desperately need is some real scientists on the team, and proper
research.

I was of that opinion at the start but I now think the appeal of the
show (for me anyway) is that lack of a rigorous scientific approach.
Watching two hams goofing around and making mistakes is great fun!

Revisiting the same myth three times, and admitting they were wrong the
first time, is not really that good IMO.

Yep, gotta take the bad with the good though I guess.

the characters are great fun, and the stuff they build is cool.

Yes, would be a great show with a bigger budget and some real science.

It would be interesting to see what a bigger budget could do, but I
suspect it would ruin the "backyard" feel to it all which I like.

In the meantime they have fun blowing up things at other peoples expense.
Good luck to them!

Bastards!
How does one get a job like that?

Dave

 

[David L. Jones]

Phil Allison wrote:

"David L. Jones"


In that case it is a direct ripoff,


** Very stupid to take what T wrote literally and without proof - like
that.

I have no reason to doubt him, so I'll happily take his word for it
thanks.

If it worries you so much Phil, how about you confirm or deny it had
those segments? You've seen it, right?

Dave

 

[rowan194]

David L. Jones wrote:

"How to beat a speed camera while doing 300km/h" is one of the gems.

Been done...

http://video.google.com/videoplay?docid=9113827775775249041&q=speed+camera

I'm not sure if Australia uses the same system.

 

[Alan Rutlidge]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:46o1fkFc1oq6U1@individual.net...

Jim Rowe WARNED me you a were a complete weirdo and a demented compewter
geek.

He was bang on.





........ Phil

Fuck off Phil. If it's the Jim Rowe I assume you are referring to, I doubt
if he'd be seen dead talking to an autistic toaster wrecker like you.

 

[Sean Lincolne]

Unfortunately my problem is finding an Australian distributor for any.
Whether I get 7 or 20, the problem is still the same.

I'll probably end up getting them from the US - Mouser have them in
their catalog - at US$0.17 each.



matt2-amstereo wrote:

technically only 7ish connectors are actually needed because there are
only 12 -12 5 -5 3.3 pgood p-on *the different colours* there are
multiples of each one for load sharing purposes (the many grounds and
+12 (yellow) that are doubled up) in reality if the load is light (via
epia's) you only need one of each colour,maybe even ditch the -5 and -12
cause they are for legacy etc

 

[The Real Andy]

On Thu, 2 Mar 2006 21:59:04 +1100, "Phil Allison"
<philallison@tpg.com.au> wrote:

"David L. Jones"

= AUTISTIC FUCKWIT




** Very stupid to take what T wrote literally and without proof - like
that.

I have no reason to doubt him,



** You equally have NO reason, whatsoever, to blindly believe his words are
literally true.




so I'll happily take his word for it thanks.


** Makes you a dumb as dog shit, pig ignorant ass.

Heeee - haaawww ...




If it worries you so much Phil, how about you confirm or deny it had
those segments? You've seen it, right?


** I have seen the all three shows and the items mentioned.

While YOU fucking well have **NOT** .

Not that it makes any difference to a brain dead, autistic cunt like YOU -
DLJ.

Jim Rowe WARNED me you a were a complete weirdo and a demented compewter
geek.

He was bang on.





........ Phil

Yawn..

 

[David L. Jones]

Alan Rutlidge wrote:

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:46o1fkFc1oq6U1@individual.net...

Jim Rowe WARNED me you a were a complete weirdo and a demented compewter
geek.

He was bang on.





........ Phil


Fuck off Phil. If it's the Jim Rowe I assume you are referring to, I doubt
if he'd be seen dead talking to an autistic toaster wrecker like you.

Yeah, Phil is showing off again because *the* Jim Rowe talked to him on
the phone a couple of times.
It's all here somewhere:
http://groups.google.com.au/group/aus.electronics/browse_frm/thread/b6020023a669091a/6ed0803918569ef8?

LMAO!

Dave