PRC as a amplifier in GPS question.

[bin]

thanks for these links...... I'll give them a good go.... I still have a
bee... but havent used it for ages and didn't feel like firing it up anymore
for this stuff.

As a sidenote... I notice that RCS radio will be releasing all the AEM's on
CD sometime in the future....

Last time I saw Tom moffats webpage he was up the top of cape york running a
corner store or something like that..... but cant find it now.

regards,
bin


"Malcolm Moore" <abor1953needle@yahoodagger.co.nz> wrote in message
news:cfu1m0l0sb10vrbo5ut7cjvnkvq4gk5ai9@4ax.com...

On Sat, 2 Oct 2004 21:20:28 +1000, "Dingo" <nsjunkstuff@hotmail.com
wrote:

I have no idea what you are talking about as i was 3 at the time but if
you
luck out with finding PC software you could try a C64 emulator running on
PC - google is your friend but here is one link to get you started

http://www.computerbrains.com/ccs64/

Or you could buy the real deal on eBay

Or even an Amiga 500 with an emulator

Or if you have some C64 code or schemeatics - somone here might code a
new
app for you

"bin" <bin@bin.com> wrote in message
news:415e8b0c_1@news.iprimus.com.au...
Hi all......

Anyone remember Tom Moffats "Listening Post" Weather FAX project from
the
July 1985 issue of AEM?

It was released with software for the Microbee and C64.......

I'm wondering if anyone has any software available for the PC ?

I did a search for Tom on the internet.... but no luck so far.......


There is functionally similar software for the PC. Look at
http://www.jvcomm.de/index_e.html

I used to use JVfax 7.0 which is still available at
http://www.pervisell.com/ham/downloadfreesoftware.html#JVFAX%20Version%207

The interface is a lot simpler, an opamp which can be fitted in the
body of a D type serial plug.

----
Regards
Malcolm
Remove sharp objects to get a valid e-mail address

 

[David L. Jones]

"bin" <bin@bin.com> wrote in message news:<41611125_1@news.iprimus.com.au>...

thanks for these links...... I'll give them a good go.... I still have a
bee... but havent used it for ages and didn't feel like firing it up anymore
for this stuff.

As a sidenote... I notice that RCS radio will be releasing all the AEM's on
CD sometime in the future....

That notice has been up for years now!

Dave

 

[Externet]

Yes, you can use an adapter with the same primary tension as two of
the phases tension. Measure voltage across 2 phases first.
Miguel

 

[swanny]

John Popelish wrote:

Johnietta wrote:

I have a machine with 1kW, 3 phase motor.
I also have a sensor board measuring temperature, humidity and rotation
speed. This board operates with 9v, 100mA DC.
How can I obtain 9v from the 3 phase power line?
Can I use any two line of the 3 phase power line to connect an ordinary 240v
to 12 v transformer?


Yes, if the 3 phase power has 240 volts line to line.

It's more likely to be 415V phase-phase and 240V phase-neutral.
Is it a star or delta 3-phase system?

 

[James]

"John G" <Greentest@ozemail.com.au> wrote in message news:<Rfj9d.302$dE6.8007@nnrp1.ozemail.com.au>...

Johnietta> wrote in message
Snipto 12 v transformer?

The above seems to originate in Australia where there is almost
universally 3phase Y connected 230/400 volt supplies.
In a motor situation there may not be a handy neautral but general
purpose power is always 230 volts phase to neautral and the only
trnsformers (Wall Warts) readly avaiable are 230 to whatever.
Of course it may be expedient to buy a special transformer with a 400
volt primary if there is no neautral at the actual location this 9 volts
is required.

Thats the usual way here in aus. Transformers with 415 volt primaries
aren't too hard to find here, its very common in industrial control.
An industrial supply shop should have the transformer you want. If you
try and connect a transformer designed for 240 onto 415 volts it will
saturate and you will quickly burn it out. If a neutral is present
just connect it between an active and neutral. Be careful of colour
codes too, machines seem to use a wide variety of colours for various
things - black isn't necessarily neutral.

Check the voltage first


cheers

 

[D MARSHALL]

weeeeeeeeeeeeeeeeeeeeeeeee!

"okidoki" <okidoki@free.com> wrote in message
news:41672895$0$16572$8fcfb975@news.wanadoo.fr...

--

http://www.carrefourtechno.com/carrefour/sites/fo/redir.php?c=1&g=1&m=1&u=47

40&l=fr_FR&k=1AujXrygxpcja7VoyYKzgiUbUNlNo91

 

[Eric]

narrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr!
"D MARSHALL" <eat@joes.com> wrote in message
news:41678293$0$10347$afc38c87@news.optusnet.com.au...
weeeeeeeeeeeeeeeeeeeeeeeee!

"okidoki" <okidoki@free.com> wrote in message
news:41672895$0$16572$8fcfb975@news.wanadoo.fr...

--

http://www.carrefourtechno.com/carrefour/sites/fo/redir.php?c=1&g=1&m=1&u=47

40&l=fr_FR&k=1AujXrygxpcja7VoyYKzgiUbUNlNo91



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.775 / Virus Database: 522 - Release Date: 08-Oct-04

 

[KLR]

On Fri, 8 Oct 2004 00:12:29 +1000, <Johnietta> wrote:

I have a machine with 1kW, 3 phase motor.
I also have a sensor board measuring temperature, humidity and rotation
speed. This board operates with 9v, 100mA DC.
How can I obtain 9v from the 3 phase power line?
Can I use any two line of the 3 phase power line to connect an ordinary 240v
to 12 v transformer?

If it has only 3 wires (3 phases at 240v each) then you cannot
connect a 240v transformer between them as there will be 415v there.

if there is a neutral though, you can connect between ANY phase and
the neutral to get 240v.



In this case though I would be cautious as if connected this way, and
you lose power on that one phase - you lose power to your circuit -
and if its controlling the motor etc - it may lose control and that
may have nasty consequences for the motor if the other phases are
still present and its controller is off.

If this can happen I would incorporate motor shutdown on phase loss or
other such circuitry.

 

[Hopkins]

I have a machine with 1kW, 3 phase motor.
I also have a sensor board measuring temperature, humidity and rotation
speed. This board operates with 9v, 100mA DC.
How can I obtain 9v from the 3 phase power line?
Can I use any two line of the 3 phase power line to connect an ordinary
240v
to 12 v transformer?

Would never use a sensor supplied from the motor supply as motors have large
currents / back emf etc.

Suggest source a seperate supply or run on batteries.

 

[James]

"Hopkins" <rdhopkins@ihug.co.nz> wrote in message news:<ckb1rt$jon$1@lust.ihug.co.nz>...

I have a machine with 1kW, 3 phase motor.
I also have a sensor board measuring temperature, humidity and rotation
speed. This board operates with 9v, 100mA DC.
How can I obtain 9v from the 3 phase power line?
Can I use any two line of the 3 phase power line to connect an ordinary
240v
to 12 v transformer?


Would never use a sensor supplied from the motor supply as motors have large
currents / back emf etc.

Suggest source a seperate supply or run on batteries.

1kW motor @ 415 volts will only have a nameplate current of around 2.5
amps. The starting current would most likely be less than a house-hold
vacuum cleaner. You will of course need it to be regulated and
filtered and be suitable for the environment etc. If you connect it
phase to neutral or phase to phase - the transformer primary voltage
will need to match the voltage you are supplying it or it wont work.
Connecting it phase to earth will work but is potentially quite
dangerous and against the rules.

Machine control and lighting circuits are often operate at extra low
voltage and supplied by a transformer connected phase to phase. Most
likely sourcing the power will be the easy task - making it both safe
and functional may present more of a challenge. Industrial electrics
are much more expensive and must be done much more carefully than
domestic electrics.

Best thing to do would be to speak to someone who has experiance in
wiring such things and get their advice. There can be a lot of things
which are not apparent to people who dont have experiance in the field
- I dont mean to be a wet blanket but you sound like you may need a
hand from an expereinced person.

cheers
James

 

[John Popelish]

DCServoMotor wrote:

What is the difference between a brush type "ordinary" DC motor and DC
"servo" motor?
Does adding a quadrature encoder to the ordinary DC motor convert it to a DC
sevo motor?

Ordinary brush type DC motors come in several flavors. Series wound
motors (also called universal wound because they can run on AC) have
the field windings wired in series with the armature, so that the
torque produced is proportional to the square of the current (the
armature current reacts against the equal field current). Since these
produce torque in the same direction, regardless of the direction of
current (hence the usability on AC). So these are not usable as servo
motors.

Shunt wound motors have the field winding either wired in parallel
with the armature, or excited by a separate current, entirely. The
separately excited shunt wound motors can be used as servo motors,
since their torque is essentially proportional to armature current and
their speed is approximately proportional to armature voltage.

Permanent magnet field motors are very similar in character to
separately excited wound field motors, since their field's magnetic
strength is not related to armature current. They are commonly used
as servo motors.

Any motor that can produce torque in either direction can, in theory,
be made into a servo motor if you can measure its speed to be used by
the servo loop controller. Being able to measure the torque is very
handy, also, so motors that have torque proportional to armature
current make this easy.

Strictly speaking, a servo is a motor application, not a type of
motor.

--
John Popelish

 

[Null]

On Wed, 20 Oct 2004 08:21:11 +0200, ALPI
<alain.pinchemail_nospam@skynet.be> wrote:

Where can I find the pinout of the 5-pin mini-din connector. I have not
found anything on the web.
My question is thus where is pin 1, pin 2 and so on
In attachment a picture of it.
This is used by e.g. the TRX-026, TRX-027 and TRX-O24 power adapter :
1 : + 12 V
2,4 : return
3,5 : 5 V

Naughty, naughty, attachments are frowned upon - please link to a
picture in future.

You could use a multimeter to work it out easily if you have one.

Otherwise, look here:

http://www.electronics2000.co.uk/data/pinout/minidin.htm

(Google is your friend - use it - I found this on the second hit
searching for "5 pin din pinout").

 

[ALPI]

Null a écrit :

On Wed, 20 Oct 2004 08:21:11 +0200, ALPI
alain.pinchemail_nospam@skynet.be> wrote:

Where can I find the pinout of the 5-pin mini-din connector. I have not
found anything on the web.
My question is thus where is pin 1, pin 2 and so on
In attachment a picture of it.
This is used by e.g. the TRX-026, TRX-027 and TRX-O24 power adapter :
1 : + 12 V
2,4 : return
3,5 : 5 V


Naughty, naughty, attachments are frowned upon - please link to a
picture in future.

You could use a multimeter to work it out easily if you have one.

Otherwise, look here:

http://www.electronics2000.co.uk/data/pinout/minidin.htm

(Google is your friend - use it - I found this on the second hit
searching for "5 pin din pinout").

I'm very sorry for the annoyance.
I don't have the power adapter. I only have the Iomega cd-rom drive.
Thus the use of the multimeter can help me to identify the 12 V but
cannot help me to make the difference between the couples + 5 V and
return.
Thank you for giving me the web site, but it didn't help me. Only the
mini din 6 and 8 appear on the site.

--
Ceci est une signature automatique de MesNews.
Site : http://mesnews.no-ip.com

 

[Null]

On Wed, 20 Oct 2004 18:29:34 +0200, ALPI
<alain.pinchemail_nospam@skynet.be> wrote:
-snip-

I'm very sorry for the annoyance.

Not a problem just letting you know.

I don't have the power adapter. I only have the Iomega cd-rom drive.
Thus the use of the multimeter can help me to identify the 12 V but
cannot help me to make the difference between the couples + 5 V and
return.

Hmmm see below.

Thank you for giving me the web site, but it didn't help me. Only the
mini din 6 and 8 appear on the site.

Yeah sorry, I noticed that after I posted. However they both appear to
follow the same numbering convention. You'd think the 5 pin would too,
except that pin #2 appears to be missing (not 6). Check with the DMM
and see if it does follow the same convention but skipping pin #2 on
the 6 pin diagram, i.e. 1=1, 3=2, 4=3, 5=4, 6=5.

Have you tried contacting the manufacturer (web site / email)?

 

[Null]

On Wed, 20 Oct 2004 18:29:34 +0200, ALPI
<alain.pinchemail_nospam@skynet.be> wrote:

Null a écrit :
On Wed, 20 Oct 2004 08:21:11 +0200, ALPI
alain.pinchemail_nospam@skynet.be> wrote:

Where can I find the pinout of the 5-pin mini-din connector. I have not
found anything on the web.
My question is thus where is pin 1, pin 2 and so on
In attachment a picture of it.
This is used by e.g. the TRX-026, TRX-027 and TRX-O24 power adapter :
1 : + 12 V
2,4 : return
3,5 : 5 V

Found some more diagrams but they are not numbered 1-5 ( numbered

1,3,5,6,8 instead)

http://www.smp-tech.com/interconnect/ic_mini_din_connectors.htm

 

[Mike]

In article <4170a07d$0$24701$afc38c87@news.optusnet.com.au>, UmmaFriel says...

We can test normal PNP and NPN transistors with OhmMeter.
Can we test (how) MOSFETs in the same way?

Easy,

For n-channel mosfets.

As there is a diode from source to drain, first put some -ve bias
on the gate so connect meter with +ve on ground (source) and -ve on gate
to impress a bias on the gate and it will stay for a while if
the device and air is dry as its a nice capacitor.

Then, without touching gate, remove leads and connect across
source and drain, first one way then the other, in one direction
it will be a diode in the other it should be off.

Then put +ve bias on gate in reverse of above procedure. Then
measure again, this will show a lower than normal diode forward
drop and conduction in the other direction as well if the mosfet
is OK. On some good mosfets as little as 1.5v gate will show
only a few ohms across source/drain - if you are fast enough.
If charge bleeds quickly then gate might have some damage or
device or air is moist. On good mosfets you can hold a gate
charge for several minutes.

On slightly bad mosfets and after putting a +ve bias, reversing
the source drain with a meter will drain some charge from
the gate - I consider this slightly marginal as it doesnt seem
to happen on a new device straight out of the tube but often
appears to happen to devices that have been close to SOA for
a while...

Caution, as mosfets dont need much to blow a gate, 20-30v is all
it takes at ultra low current to pop a gate !

You can also measure between gate and source or drain, in either
direction, should be nothing if gate hasnt popped its insulator.

Reverse above for p_channel.



--
Rgds
Mike
Commodore VL Fuse Rail that wont warp or melt, Perth WA
http://niche.iinet.net.au

 

[ALPI]

Null a formulé ce jeudi :

On Wed, 20 Oct 2004 18:29:34 +0200, ALPI
alain.pinchemail_nospam@skynet.be> wrote:

Null a écrit :
On Wed, 20 Oct 2004 08:21:11 +0200, ALPI
alain.pinchemail_nospam@skynet.be> wrote:

Where can I find the pinout of the 5-pin mini-din connector. I have not
found anything on the web.
My question is thus where is pin 1, pin 2 and so on
In attachment a picture of it.
This is used by e.g. the TRX-026, TRX-027 and TRX-O24 power adapter :
1 : + 12 V
2,4 : return
3,5 : 5 V

Found some more diagrams but they are not numbered 1-5 ( numbered
1,3,5,6,8 instead)

http://www.smp-tech.com/interconnect/ic_mini_din_connectors.htm

Thank you very much.
It's indeed what I was looking for.
Yesterday I took my DMM and found : referred to the arrangement above :
1 = alone
3,6 = together
5,8 = together
3,6 = ground of the audio rca plug

Thus it should be :
1 = 12 V
3,6 = ground
5,8 = 5 V

Can you confirm this ?

--
Ceci est une signature automatique de MesNews.
Site : http://mesnews.no-ip.com

 

[Null]

On Thu, 21 Oct 2004 20:13:41 +0200, ALPI
<alain.pinchemail_nospam@skynet.be> wrote:

Null a formulé ce jeudi :
On Wed, 20 Oct 2004 18:29:34 +0200, ALPI
alain.pinchemail_nospam@skynet.be> wrote:
-snip-
Can you confirm this ?
No.

Sorry.
Can you?

 

[Sticks]

"Alex Gibson" <me@privacy.net> wrote in message news:<2ucekbF244ht5U1@uni-berlin.de>...

"Sticks" <ksbutler@iinet.net.au> wrote in message
news:4180f134$0$13753$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Hi All ,

Has anyone had any experience in designing a PLD directly from a
schematic
diagram using Protel 98 .....
Have used Protel for schematics and autorouting creating footprints
etc
and in the process of trying to learn more in the sch/pld area
Libraries provided for PLDs and symbols seem to be a bit light on .

I was able to design PLD from an example schematic given , also to
design
another although extremely simple logic with a couple of AND gates
just to see if i could get it to work.

Any ideas or pointers to some online help would be appreciated
or are later Protel versions more efficient in this area .

thanks

What pld are you using ?

pla, pal, cpld, fpga ?

Which manufacturer ?

Does the manufacturer of the pld provide free software ?

If its an older pld can you use one of the free software packages ?

Alex

Using GAL20V8A and possibly PAL series
, have no problems using WINCUPL to write code and then
program the chip , but i am trying to basically do the
same but directly designing from a schematic diagram
in Protel , they have been using ORCAD but i think
thats a bit outdated and besides i have not used it before

 

[Rheilly Phoull]

"carl" <nospam@charter.net> wrote in message
news:10p5karcm40qu57@corp.supernews.com...

oops....i'm thinking you are in america but i'm thinking now australia?
my response would work in america but i'm not sure what the voltages are
in australia.
be careful

carl wrote:

bust out one of the phases and neutral. you can run this to the
appropriate transformer with some filter caps in front of and behind a
7809 voltage regulator ic.
any of the phases to neutral will be about 120vac but if you go across 2
phases then the voltage goes up to about 208vac or so
be careful

Howard Latham wrote:

Johnietta> wrote in message
news:41654ed0$0$20581$afc38c87@news.optusnet.com.au...

I have a machine with 1kW, 3 phase motor.
I also have a sensor board measuring temperature, humidity and
rotation speed. This board operates with 9v, 100mA DC.
How can I obtain 9v from the 3 phase power line?
Can I use any two line of the 3 phase power line to connect an
ordinary 240v to 12 v transformer?



If you have to ask that, you shouldnt be doing any such thing!

Whilst no doubt you could make it work in that manner (Aus supply being 415v
phase to phase) it would not be a good method. Far better to have a seperate
supply for the monitoring eqt. I am assuming that the motor runs off an
outlet ??
If it has a control cabinet or motor starter cubicle then mounting the
tranny with a fuse in the supply line would be the best approach.

--
Regards ........... Rheilly Phoull