PRC as a amplifier in GPS question.

[Kralizec Craig]

David Segall <david@nowhere.net> writes:

I am writing a program that outputs DTMF tones from my computer
speakers to dial telephone numbers in my address book. I decided to
add a button to do automatic call back if the number is engaged. The
instructions in the phone book which are also here -
http://telstra-fixed.custhelp.com/cgi-bin/telstra_fixed.cfg/php/enduser/std_adp.php?p_faqid=1154&p_created=1111370527&p_sid=v_z-edWh&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MyZwX3Byb2RzPTAmcF9jYXRzPSZwX3B2PSZwX2N2PSZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PXJlY2FsbA**&p_li=&p_topview=1
say to press "Recall" then *37#. Can I send tones to emulate "Recall"
or is it some other change of state on the phone line? If the latter,
what is it?

The 'recall' function is commonly referred to as 'hook flash' where the line
is dropped and picked up within a short period of time. There probably is a
way to send some sort of command to the exchange hardware that tells it you
want to initiate the same function as if you've flashed the line, but
Telstra probably would do their utmost to make sure nobody can find out
about it.

Craig.
--
SUN RIPENED KERNELS - Surplus Sun Microsystems Equipment, Parts + Accessories
Waterfall, NSW, Australia - Operated by Craig Dewick - Founded in 1996
Main site: www.sunrk.com.au - Ebay Shop: www.ebayshops.com.au/sunripenedkernels
Ph: +612-9520-2547 - Fax: +612-9520-2557 - Mobile: 04-2163-0547 (int. +614)

 

[Phil Allison]

"Tom"

I was interested in building a weather station with a thermometer,
barometer, rain gauge etc.

I was interested in building some sort of a connection from this station
which would be outdoors to my computer where the results could be
tabulated into graphs for each day of the year.

I would eventually hope that this info could be displayed on a website and
automatically updated every 10 minutes.

I know nothing about electronics, if that helps.

** Then you had better find someone who can build the electronics for you.

Silicon Chip magazine published a " Solar Powered Wireless Weather Station "
project in December 2004 - aka Picaxe Weather Station.

Had temp and humidity only.

Use a radio modem or send data to a PC.



.......... Phil

 

[Heywood Jablome]

You wanted exotic.

Check out the Zen-lightenment from http://www.passdiy.com/amps.htm

 

[Clifford Heath]

Jasen Betts wrote:

"recall" is another name for a hook-flash (a rapiid onhook-offhook)

I believe there are two standards for the duration of the
hook-flash, and the Australian one is between 100-500ms.
The other system is under 100ms, which was all that was
supported on one old (non-approved) phone we bought. I
used to simply bump the hang-up button instead, until we
replaced it with a legal phone.

 

[David L. Jones]

Tom wrote:

Hi,

I hope I have the right group as I have no idea where I could post this
question.

I was interested in building a weather station with a thermometer,
barometer, rain gauge etc.

I was interested in building some sort of a connection from this station
which would be outdoors to my computer where the results could be tabulated
into graphs for each day of the year.

I would eventually hope that this info could be displayed on a website and
automatically updated every 10 minutes.

I know nothing about electronics, if that helps.

Thanks for your suggestions

Tom

Internet connected Personal Weather Stations are getting popular,
apparently fairly trivial to connect to other weather stations out
there and websites like Weatherunderground, so you can share with
everyone.
This is a good place to start for info:
http://www.weatherunderground.com/weatherstation/index.asp

This guy for example has one in Woodford in the Blue Mountains:
http://www.weatherunderground.com/weatherstation/WXDailyHistory.asp?ID=INSWWOOD1

You can see all the ones around a local region at the bottom of the
weatherzone site, like Sydney:
http://www.weatherunderground.com/global/stations/94767.html

Dave

 

[John_H]

Tom wrote:

I was interested in building a weather station with a thermometer,
barometer, rain gauge etc.

If you're really serious you'll also need a hygrometer, an anemometer
and possibly a radiometer and UV sensor.

I was interested in building some sort of a connection from this station
which would be outdoors to my computer where the results could be tabulated
into graphs for each day of the year.

Then you'll also need a data logger and appropriate software.

I would eventually hope that this info could be displayed on a website and
automatically updated every 10 minutes.

Mine does all that, straight out of the box.

I know nothing about electronics, if that helps.

In which case there's probably far more rewarding electronic projects
to cut your teeth on, particularly given the vast number of automatic
weather stations already available at very competitive prices -- and
far cheaper than the basic components needed for a DIY job.
The economics would probably be similar to building your own TV set vs
a bought one.

Mine's a wireless Davis Vantage Pro, which costs around $1,100,
complete with data logger and software, but you can also get other
brands with similar features, but not necessarily the durablity and
accuracy, from around $400 (La Crosse is a popular one). Davis, also
offer much cheaper models if you don't want all the features up front.
Quality is uniform throughout their range.

Ecowatch, at Kilsyth, Vic, will supply a catalogue and price list on
request. AFAIK they don't have a website

The weather newgroups are... alt.talk.weather...
sci.geo.meteorology... uk.sci.weather

Personal weather stations are a regular topic on all of them. The UK
NG is the most active.

--
John H

 

[Rob]

If you consider buying rather than building then Ecosolutions :
http://www.ecosolutions.com.au/ do one for ~$479+gst.

Has wireless link to Wind dir / speed / temp / rh / rainfall instruments.
Touchscreen LCD control / readout / logger unit.

S/w included for PC connection - has some weather prediction tools.

I haven't seen one, just heard about them.

rob


"Tom" <nospam@nospam.com> wrote in message
news:4393d2ee$0$9287$afc38c87@news.optusnet.com.au...

Hi,

I hope I have the right group as I have no idea where I could post this
question.

I was interested in building a weather station with a thermometer,
barometer, rain gauge etc.

I was interested in building some sort of a connection from this station
which would be outdoors to my computer where the results could be
tabulated
into graphs for each day of the year.

I would eventually hope that this info could be displayed on a website and
automatically updated every 10 minutes.

I know nothing about electronics, if that helps.

Thanks for your suggestions

Tom

 

[David Segall]

Franc Zabkar <fzabkar@iinternode.on.net> wrote:

On Sun, 04 Dec 2005 16:01:36 GMT, David Segall <david@nowhere.net> put
finger to keyboard and composed:

I am writing a program that outputs DTMF tones from my computer
speakers to dial telephone numbers in my address book.

LOL. An acoustic coupler.

I decided to
add a button to do automatic call back if the number is engaged. The
instructions in the phone book which are also here -
http://telstra-fixed.custhelp.com/cgi-bin/telstra_fixed.cfg/php/enduser/std_adp.php?p_faqid=1154&p_created=1111370527&p_sid=v_z-edWh&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MyZwX3Byb2RzPTAmcF9jYXRzPSZwX3B2PSZwX2N2PSZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PXJlY2FsbA**&p_li=&p_topview=1
say to press "Recall" then *37#. Can I send tones to emulate "Recall"
or is it some other change of state on the phone line? If the latter,
what is it?

Why not use a modem and a built-in app?
It's the usual hardware/software trade off. My study has two telephone

lines and only one modem. My wife's study has no telephone lines and
no modem but she does have a cordless phone.

 

[Ken Taylor]

Phil Allison wrote:

"two bob"

Why re-invent the wheel? It's already being done by the govmnt.




** Huh ?

What government invented the wheel ?




......... Phil


You misunderstood him- the gov'mnt re-invented the wheel.

Ken

 

[will kemp]

On Sun, 04 Dec 2005 16:01:36 +0000, David Segall wrote:

I am writing a program that outputs DTMF tones from my computer
speakers to dial telephone numbers in my address book. I decided to
add a button to do automatic call back if the number is engaged. The
instructions in the phone book which are also here -
http://telstra-fixed.custhelp.com/cgi-bin/telstra_fixed.cfg/php/enduser/std_adp.php?p_faqid=1154&p_created=1111370527&p_sid=v_z-edWh&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MyZwX3Byb2RzPTAmcF9jYXRzPSZwX3B2PSZwX2N2PSZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PXJlY2FsbA**&p_li=&p_topview=1
say to press "Recall" then *37#. Can I send tones to emulate "Recall"
or is it some other change of state on the phone line? If the latter,
what is it?

Have a look at Asterisk - a free software pbx:

http://www.asterisk.org

If using Asterisk itself isn't a solution to your problem (and it's a bit
of overkill, just for a dialler!), reading through the source code may
give you some helpful information.

Will

 

[quietguy]

Getting old? I guess I must be as in 'my day' electros operated far below
their rated voltage (eg a 16mfd 350vw used in a low voltage point such as
cathode bypass) were said to not form properly - eg not 'achieve' their rated
capacitance. Have things changed?

David

 

On Mon, 5 Dec 2005 17:50:30 +1100, "Heywood Jablome" <reply to thread> wrote:

You wanted exotic.

Check out the Zen-lightenment from http://www.passdiy.com/amps.htm

Now thats pretty cool1 An amp you can read by!

 

[Dand]

There are simple ways, if you know electronics.

An inverter with a resistor across the input and output and a capacitor from
ground to input will oscillate at the output as long as the inverter has
some hysstatsis. If you use 2 resisters and a transistor as the inverter
(pnp emitter ground, two resistors to source from the collector, output
between the resistors, it should work ok.

Of you could just get a 555..... google it and you should hit about 10
billion 555 circuits

I need to put a turn indicator blinker system on my 6 Volt vehicle.
I'm looking for a circuit to provide the timed flashing, maybe using a 555
IC.
Thought there'd be lots to find, but no. Any reason a 555 can't be used?
Anyone know of a suitable circuit?
I want to avoid electro-mechanical flasher cans.

 

[FruitLoop]

"Phil Allison" <philallison@tpg.com.au> wrote in message
news:3vg5uoF140mgoU1@individual.net...

"Rod Out Back"

Not really on topic, but there's a bit of lack of such places to ask...

Has anyone ever seen christmas-tree lights that operate on 12 or 24v DC
for sale in Australia? All I have seen are either 240v AC or 24v AC.
Havent seen any DC units. I must ahve looked at about 15 different
brands
so far, but nothing operating in DC.


** Hey man - have I got news for YOU !!!

Electric light bulbs work on DC and on AC !!!!!!!!!!!

Way cool - eh ??????

Your on to something .........

.......... Phil

 

[coaster]

check out aus.cars

"Lord-Data" <data@ihug.com.au> wrote in message
news:43941bf7$0$13321$61c65585@un-2park-reader-01.sydney.pipenetworks.com.au...

Ok, most major car stereo makes now have very functional iPod interfaces,
and I am currently shopping for a new stereo for my VT. Since the VT is
double-DIN equipped, I was tossing up the idea of an in-dash LCD screen as
well as a stereo. Since a DVD-Capable stereo is a bit out of my price
range (and also rather rare, it seems), and I am soon getting a Video
iPod, I was planning the following:

Headunit, possibly Pioneer
iPod interface link, from approriate brand, for example, Pioneer in this
case..

In Dash TFT Screen. All speakers/sound run from the Headunit, ipod feeds
sound to headunit, headunit controls ipod, obviously. If the iPod was a
Video model, can the iPod still play these while linked to the stereo? Ie,
hit play on a video on the ipod, sound comes via headunit -> speakers,
video via ipod's built in composite video out -> tft screen .. Can this be
done? With 2 inputs on the screen, it should allow for future expansion
for a glove-box dvd player or similiar one-day in the future..

Just curious tho, if anyone knows if the ipod goes into a "dead" state
while being controlled by the headunit? I'm guessing the headunit can't
control the video, but thats fine, I'm planning a dash-mounted cradle for
the ipod, I can control video from there.. Just gotta make sure the ipod
won't go dead to its own controls while plugged into the system

Anyone got any info? Thanks in advance!

 

[FruitLoop]

"Jasen Betts" <jasen@free.net.nospam.nz> wrote in message
news:3607.4393c9f1.246d5@clunker.homenet...

On 2005-12-04, Rod Out Back <someone@IHATESPAM.BIGPOND.COM> wrote:

Not really on topic, but there's a bit of lack of such places to ask...

Has anyone ever seen christmas-tree lights that operate on 12 or 24v DC
for
sale in Australia? All I have seen are either 240v AC or 24v AC. Havent
seen any DC units. I must ahve looked at about 15 different brands so
far,
but nothing operating in DC.

I wondered if anyone had seen such a beast for sale online? Getting an
AC
source is going to be too cost-prohibitive for what I want.

AC poower supplies are cheaper to manufacture than DC ones and lamps don't
care if it's AC or DC.

24V lamps should work fine off 24V DC.

Thomas Edison will back you up , however Westinghouse wouldnt like it ......

Bye.
Jasen

 

[The Real Andy]

On Tue, 6 Dec 2005 16:37:23 +1000, "Dand" <dand@dand.net.au> wrote:

There are simple ways, if you know electronics.

An inverter with a resistor across the input and output and a capacitor from
ground to input will oscillate at the output as long as the inverter has
some hysstatsis. If you use 2 resisters and a transistor as the inverter
(pnp emitter ground, two resistors to source from the collector, output
between the resistors, it should work ok.

Of you could just get a 555..... google it and you should hit about 10
billion 555 circuits
I need to put a turn indicator blinker system on my 6 Volt vehicle.
I'm looking for a circuit to provide the timed flashing, maybe using a 555
IC.
Thought there'd be lots to find, but no. Any reason a 555 can't be used?
Anyone know of a suitable circuit?
I want to avoid electro-mechanical flasher cans.

There is a 555 variant specifically targetet at automotive use, cant
remember it off the top of my head, but it exists. Personally, if I
were you, i would head down to my local supercheap (or similar auto
store) and by a generic electronic flasher. It will more that likely
work and if it doesn't it wont be hard to modify. I would be surprised
if you could not find one targeted for 6V.

BTW, what is wrong with a electro-mech flasher? They have been in use
for a very long time, and still are. They must have something going
for them.

 

[The Real Andy]

On Sat, 03 Dec 2005 10:03:49 +1000, ajs85t0fwgwb4zv@jetable.org wrote:

The Real Andy wrote:
I have Protel exp, multi layer surface mount, high volume production,
emc experience and automated design experience. My going rate used to
be about the $50/hour. And I live in Brisbane. I am willing to
negotiate.....I also have experience with high volume injection
moulding and prototyping. I did utilise QMI for some of that UV Resin
stereo lithography, as well as destructive low volume silicone plastic
moulding. Did you know that QUT does have the facilities for EMC
testing, for a very small price, much cheaper than certification.
Hmmmm, i am pissed, I do own a protel licence however. Bet you aint
serious....

Hi Andy,

Please drop me an email to ajs85t0fwgwb4zv at jetable.org so we can
discuss further details regarding this project.

Shit, i forgot about this post. Whats a decent PCB draftsman cost now
days? I must have been pissed when I replied, $50/hour is a bit on the
cheap side these days I assume?

PS. IF you are desperate, you can email me at therealpearo at hotmail
dot com.

 

[The Real Andy]

On Mon, 5 Dec 2005 16:41:05 +1100, "Tom" <nospam@nospam.com> wrote:

Hi,

I hope I have the right group as I have no idea where I could post this
question.

I was interested in building a weather station with a thermometer,
barometer, rain gauge etc.

I was interested in building some sort of a connection from this station
which would be outdoors to my computer where the results could be tabulated
into graphs for each day of the year.

I would eventually hope that this info could be displayed on a website and
automatically updated every 10 minutes.

I know nothing about electronics, if that helps.

Thanks for your suggestions

Tom

If you are in australia, www.bom.gov.au seems to do the trick. Failing
that, i think you can even dial into the bom, or at least you used to
be able too.

If you want to get real tricky, try this place
http://www.clevelandweather.net/ cause he does all you want, why i
dont know, but whatever turns you on..

 

[Jordan]

Ken Taylor wrote:

No circuits? Are you kidding? Search for '555 astable' and if you want to
narrow it down more add '50%' to the search terms. Use the output of the
astable to drive a MOSFET or relay to drive the lights.

Is it OK to have the 555 powered up all the time?
I'd prefer if it only got power when the blinker switch is activated.
It's refinements like this that I was hoping to find.

Thanks
Jordan