PRC as a amplifier in GPS question.

[Warren]

Thanks to all for the info.....

Warren..

Phil Allison wrote:

"The real Andy" <ihatehifitrolls@yahoo.com.au> wrote in message
news:3f38841b$0$28120$afc38c87@news.optusnet.com.au...
"Rob Judd" <judd@ob-wan.com> wrote in message
news:3F37802E.DE9421AB@ob-wan.com...
Warren wrote:

Anyone know of a opamp equivalent for
a old quad opamp, uA4136.used in a EA kit, Musicolor IV -colour organ
/
light chaser.
Was thinking along the lines of a TL074 but
are the pinouts the same ?

The uA4136 was essentially a quad 741 IC. They're pretty noisy, and
with a bit of effort a TL074 should do a better job. These are NOT
pin-for-pin compatible.

For a musicolour i doubt noise is going to matter. The musicolur i
remember
is probably what i would term as a 'primative design' and could no doubt
be
redesigned a lot better with cheaper technology.

** A uA4136 is very quiet - only 1.4 uV equivalent input noise in 20
kHz bandwidth.

Was used in many kit and famous brand graphic equalisers for example.

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

 

[moptop]

I moved the MOSFET around, and got it working like this:

+12V
| +5V
M |
| S
\—————|
| R
GND |
GND

Thanks for your help

However, I hooked up a P-channel MOSFET like this, and it's not
working:

+5V
+12V |
| R
/—————|
| S
M |
| GND
GND

When I hook up an LED up with a 5V supply and a resistor (1k) in place
of the motor, everything works fine.
But when I connect the LED with a 12V supply and the same resistor, it
won't switch off.
And when I put the motor back in without the LED or the resistor, it
won't switch off either.

How can I fix this?

Both this and the N-channel MOSFET are logic level type, having a gate
threshold voltage of 1-2V.

In case it help, the N-channel is an NTP75N06L and the P-channel is an
MTP50P03HDL. Both are from www.onsemi.com.

Thanks,

Jack

 

[Rudolf Ladyzhenskii]

Hi,

You can try to load the tape, put it in REW and turn power off.

Then try to move motor manualy and see if there any problems.

Ideally, you need a "dummy tape" for it. This is the special tape used in
repairs. Just a plastic outline of a cassete case, so you can see and touch
mechanism through it.

Make sure that tape spools rotate freely when breaks released.

I am trying to remember the mechanism in SLVX322. I have a SLVX57 on teh
bench at the moment and can measure pinch roller. Can someone confirm if
mechanisms are same? (I do not think so, but....)

Does your mechanism has a large PCB under the mechanism? Single belt or
multiple rubber belts?
If this is the mech I am thinking of, capstan motors do fail. Try to take
rotor off and see if it is catching on windings.

Where are you located?

Rudolf

"AccuLab" <gate@dot.com> wrote in message
news:3f3893e6_1@news.iprimus.com.au...

Hi Rudolf, thanks for your reply.
I tried WES a couple of times and they just keep saying "Sorry we don't
have
one" (they don't appear to be interested) I have their catalogue but it
only
has a partial listing of the available pinch rollers and their sizes which
makes it difficult to order one of a suitable size when they're so
uncooperative, especially when I'm not 100% sure of the roller dimensions
(because there was none there to start with so I can't measure it)
It sort of RW's an FF's but struggles (spins very slowly then eventually
stops as though the motor doesn't have enough torque or power) Yes I
checked
the capstan, (if that's the one that drives the tape during play) appears
to
be fine. Belt seems okay. Tape loads fine, drum spins fine and I can
actually get a picture (believe it or not) although it's not a real good
one, (the tape turns (jerkey) for only about 10 seconds in play mode then
stops) the cassette ejects fine and doesn't chew the tape. It's like the
motor is struggling all the time. I found a few foreign objects in there
like some pine needles, a gumleaf, a beetle and a moth ..lol but they
weren't obstructing anything.
I thought there might be something hampering the gearing under the
carriage
so I removed it (the carriage) and checked all the gears and couldn't find
anything abnormal. Everything looks fine except the missing pinch roller.
Any thoughts??
Cheers
Chris



"Rudolf Ladyzhenskii" <rudolf.ladyzhenskii@REMOVETOREPLYadcomtech.net
wrote
in message news:3f386ed7$1_1@news.iprimus.com.au...
Pinch rollers are about $6. (non-original ones).
Call WES in Sydney and give them dimensions.

VCR will not play without pinch roller but should REW and FF. You
probably
have another problem in it.
Which motor did you check? Capstan?
Does VCR loads the mechanism?
Does head drum rotate?

Rudolf


"AccuLab" <gate@dot.com> wrote in message
news:3f385731$1_1@news.iprimus.com.au...
Wondering if if any of you good people out there would have a Pinch
Roller
for a Sony SLV-X322 VCR. I'm not a qualified tech but I've taken on
this
job
for a bit of a challenge and would really like to beat it. The motor
is
running okay but the machine wont play, FF or RW and is missing the
pinch
roller. I thought one of you techs out there might have a non working
machine I could get the roller out of as Sony want nearly $60 for a
replacement, ..not worth it and a bit of a rippoff I think!

I made an estimate of the size of the roller and used a vernier
caliper
to
measure the shaft dia which is 4mm
The roller dia should be about 13mm - 16mm and the height is about
13mm -
19mm

Any assist would be greatly appreciated
TIA
Chris

 

[Jon]

Years ago we fitted a truck with a 12 volt system, and left the starter
motor as it was.
It was succesful and we had no problems. If you can isolate the starter
motor circiut,
the resistance in the wiring will allow for a snappy but not damaging start.
I realise that extended starts may cause problems with overheating, as they
would with any starter, but theyre pretty tough.
They have to be. Keep your car in tune and it wont be a problem.
Convering the system to 12 volts out of the question ?


"Bryan" <bryan1@westnet.com.au> wrote in message
news:3f374807$1@news.comindico.com.au...

Hi, I'm wondering if anyone has a circuit to use, I need to jump start 6
volt batteries on vintage cars hopefully with a 12 volt battery. This
would
need to be able to handle a few amps so it can crank over those old
vintage
motors. Any suggestions would be appreciated.

Cheers Bryan

 

[Graham]

--

"Rod Speed" <rod_speed@yahoo.com> wrote in message
news:bh9ukl$vft1s$1@ID-69072.news.uni-berlin.de...

Graham <hurfy@alphalink.com.au> wrote in
message news:3f3872aa@news.alphalink.com.au...

would it be simpler, if instead of having a recording, the phone just
disconnects when it sees that it has received a blocked call ?

Simpler, sure. Hell of a risk tho with calls from the cop shop
or the hospital etc. Or even the telco. I had my long distance
calls churned last week and the telco I churned to called a
couple of times with the caller ID blocked.

although more simple, the auto cut off is not perfect....

I would think that Telsta would do little to help this design as
they must make a dollar or two from telemarketers.and you
never upset those from whom you are making a dolar or two...

Sure, but they are also unlikely to risk the shit hitting the fan
very spectacularly indeed by refusing to make the phone
ring with particular calls, even if the customer requests that.

hmm........yeah......reminds me of my Panasonic Mobile..it could be set up
so that if I rang a mate with the same model, a certain ring time would be
heard and t'other way about..if they rang me...saves folks having to look at
the caller display I suppose.
gra

 

[Rod Speed]

Steve <niftydog@hotmail.com> wrote in message
news:e28c5b43.0308131647.88eb9ae@posting.google.com...

Rod Speed <rod_speed@yahoo.com> wrote
Steve <niftydog@hotmail.com> wrote

Funny how some people posting to Usenet think that the way
to win an argument is to ramp up the pointless, immature insults
until... until... um, what does happen when you do that? What
possible benefit comes from this DH laying the boot into a complete
stranger?! I guess when you've got a small dick and a brain to
match you've gotta do SOMETHING to boost your self esteem.

Corse there aint even the slightest hint of
you doing anything like that yourself, eh ?

I fight fire with fire.

Pity you look so pathetic posturing about the use of fire like you did, fuckwit.

No wonder you're stuck with that pathetic little sheltered workshop.

Till the plug is pulled on it, anyway.

 

[Eugene Rosenzweig]

They got a free 30-day Demo or get them to send you a demo CD. Nothing beats
checking it out for yourself. I had a look at the demo a while ago and I
remember it being quite a bit different. One thing I do remember is that
they now have integrated (schematic and footprint) libraries.

"The real Andy" <ihatehifitrolls@yahoo.com.au> wrote in message
news:3f3b5044$0$15131$afc38c87@news.optusnet.com.au...

Just had a look at the Protel Site and noticed they want US$8000, not bad.
IS it worth it?? Does provide much more over 99se? I want to know before
forking out the $$$.

 

[Graham]

--

"KLR" <kreed@bigpond.net.au> wrote in message
news:rigkjvcu8paigcvibjbifcfvnb23b65jo2@4ax.com...

On Thu, 7 Aug 2003 12:59:41 +1000, "Graham" <hurfy@alphalink.com.au
wrote:


how hard would it be to design something for the phone ( landline of
course)
that, when it depicts that the callers number is blocked or whatever,
starts
a recording saying that calls with blocked numbers wont be answered...a
very
selective answring machine without the message taking facilities.....I
remember that some answering machines used to have different answers for
different callers a while back ...Would need to answer the call almost
straight away. Telemarketers dont have much time.
Would of course need to be a black box add on to the phone..


cheers

Graham

Possibly analyse the data signal that is sent down the line after the
first ring. At a guess I would imagine that one saying "private"
would be a lot different in length etc to one of a legit number and
maybe could be used to trigger a recording ?

or go the whole hog and use a microcontroller to analyse the digits
to test - and decide on an appropriate action to take.

of course such simple approaches also might catch "payphone" and
"unavailable" ID;s too - and in both these cases that isnt really
what you want

"unavailable" seems to mean "call from overseas" or "call from an
exchange that isnt equipped with equipment capable of caller ID
technology" both of which are legitimate caller types.

--------------------------

Actually I had been thinking of a similar idea to what you originally
posted - however the problems are that many people (government,
telstra, legit calls from banks, post office and other places - even
australian customs service) often legitimately use "private" on calls
made to you and these are calls that you generally DO NOT want to
miss.

Better alternative is to have a message saying that you are NOT
welcome on this line if you are a telemarketer - and if you arent -
please press #3 (or some other key) for connection. detect the DTMF
for this sequence and then allow connection

Of course if its a business phone etc - there probably isnt much you
can do




"Go and get fucked you piece of shit" is pretty much my standard
response to these telemarketing bastards if they ring with "private".

However I do politely tell them to go if they show ID.

how long will it take you to make me one ?

Would also like a caller display unit that tells me who is calling..If my
mate Phil calls, I want it to say "Phil is calling" or even just
"Phil"..over and over.I have a caller display unit that talks the
number.this is the next step..I know I can look at the caller display unit
but why race to the phone to find out its someone you dont want to talk
to...From my point of view, phones haven't advanced much ..yeah, I know
technically they might have....but they still ring, we pick them up..

gra

 

[Rod Speed]

Graham <hurfy@alphalink.com.au> wrote in message
news:3f3bc342$1@news.alphalink.com.au...

KLR <kreed@bigpond.net.au> wrote
Graham hurfy@alphalink.com.au wrote


how hard would it be to design something for the phone ( landline of
course)
that, when it depicts that the callers number is blocked or whatever,
starts
a recording saying that calls with blocked numbers wont be answered...a
very
selective answring machine without the message taking facilities.....I
remember that some answering machines used to have different answers for
different callers a while back ...Would need to answer the call almost
straight away. Telemarketers dont have much time.
Would of course need to be a black box add on to the phone..


cheers

Graham

Possibly analyse the data signal that is sent down the line after the
first ring. At a guess I would imagine that one saying "private"
would be a lot different in length etc to one of a legit number and
maybe could be used to trigger a recording ?

or go the whole hog and use a microcontroller to analyse the digits
to test - and decide on an appropriate action to take.

of course such simple approaches also might catch "payphone" and
"unavailable" ID;s too - and in both these cases that isnt really
what you want

"unavailable" seems to mean "call from overseas" or "call from an
exchange that isnt equipped with equipment capable of caller ID
technology" both of which are legitimate caller types.

--------------------------

Actually I had been thinking of a similar idea to what you originally
posted - however the problems are that many people (government,
telstra, legit calls from banks, post office and other places - even
australian customs service) often legitimately use "private" on calls
made to you and these are calls that you generally DO NOT want to
miss.

Better alternative is to have a message saying that you are NOT
welcome on this line if you are a telemarketer - and if you arent -
please press #3 (or some other key) for connection. detect the DTMF
for this sequence and then allow connection

Of course if its a business phone etc - there probably isnt much you
can do




"Go and get fucked you piece of shit" is pretty much my standard
response to these telemarketing bastards if they ring with "private".

However I do politely tell them to go if they show ID.

how long will it take you to make me one ?

Would also like a caller display unit that tells me who is calling..If my
mate Phil calls, I want it to say "Phil is calling" or even just
"Phil"..over and over.I have a caller display unit that talks the
number.this is the next step..I know I can look at the caller display unit
but why race to the phone to find out its someone you dont want to talk
to...

The Panasonic 735 cordless phone will do that. You can
record anything you like for each entry in the phone book
and it says that when they ring, repeated on each ring.

From my point of view, phones haven't advanced much ..

The 735 obviously has.

yeah, I know technically they might have....
but they still ring, we pick them up..

Some auto answer etc too.

 

[Steve]

"Rod Speed" <rod_speed@yahoo.com> wrote in message news:<bhf5iq$2frp$1@ID-69072.news.uni-berlin.de>...

Pity you look so pathetic posturing about the use of fire like you did, fuckwit.

No wonder you're stuck with that pathetic little sheltered workshop.

Till the plug is pulled on it, anyway.

Huh?! WTF are you babbling on about now?

 

[Rob Judd]

The real Andy wrote:

Just had a look at the Protel Site and noticed they want US$8000, not bad.
IS it worth it?? Does provide much more over 99se? I want to know before
forking out the $$$.

Who knows? I can't afford $8k

Rob

 

[Ken Taylor]

"Eugene Rosenzweig" <ugn@hotmail.com> wrote in message
news:3f3b913f@news.comindico.com.au...

They got a free 30-day Demo or get them to send you a demo CD. Nothing
beats
checking it out for yourself. I had a look at the demo a while ago and I
remember it being quite a bit different. One thing I do remember is that
they now have integrated (schematic and footprint) libraries.

That's a bonus in itself. Too often had inconsistencies between the

libraries!

Ken

"The real Andy" <ihatehifitrolls@yahoo.com.au> wrote in message
news:3f3b5044$0$15131$afc38c87@news.optusnet.com.au...
Just had a look at the Protel Site and noticed they want US$8000, not
bad.
IS it worth it?? Does provide much more over 99se? I want to know before
forking out the $$$.

 

[The real Andy]

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
newsXY_a.116830$JA5.2639499@news.xtra.co.nz...

"Eugene Rosenzweig" <ugn@hotmail.com> wrote in message
news:3f3b913f@news.comindico.com.au...
They got a free 30-day Demo or get them to send you a demo CD. Nothing
beats
checking it out for yourself. I had a look at the demo a while ago and I
remember it being quite a bit different. One thing I do remember is that
they now have integrated (schematic and footprint) libraries.

That's a bonus in itself. Too often had inconsistencies between the
libraries!

I only use the libries I create, which I hope will be supported by DXP. All
the footprints are crap, so I, along with a few other people, have created
all the footprints in the IPC standards and named them according to the IPC
number.

 

[Stevie Blunder]

Guyz,

Triacs do not play well with inductive loads. Worst
thing to happen is the Triac acts like a diode and
DC current ramps to infinity (smoke). Actually, any
tiny imbalance between neg and pos phase slice makes
for DC, therefore smoke. Also, when the triac tries
to turn off, the transformer will kick it with an
inductive spike that exceeds the voltage and or dVdT
spec of the triac. Adding a MOV can make on/off
work, but forget dimming with a triac.

You should be able to use a fan speed control, made
for fireplaces or ceiling fans. These are made for
inductive loads; probably don't use a triac.

Steve

shithappens <turner10@iprimus.com.au> wrote in
message news:3ee3228a_1@news.iprimus.com.au...

I dont know any reason why or why not but could i
check this by u ppl plz

I have about 4 extra 12Vdc fans controling temp in
tower case they run off
seperate transformer powersupply 'it was handy'.

Now to switch it on /off i used what I had handy a
dimmer switch on mains
side of the transformer. These are extra fans for
summer not needed in
winter.

But when i put the switch in I didnt bypass dimmer
section so now i have
variable output via pot.

Ok I know about the losses across the triac in
there but is there any other
reason not to do this?

Or of any easy way of making the 10k lnear pot on
the dimmer react within
the 6-12 volt range controlled via thermistor
I can get a ntc thermistor that goes from 1k2 at
40 degres c and 3k5 at 10
degrees c So what just put that between 2* 5k
pots and play around ????
That would take ages?
Any cheats out there I could use?

 

[David L. Jones]

On Fri, 15 Aug 2003 18:12:17 +1000, "The real Andy"
<ihatehifitrolls@yahoo.com.au> wrote:

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
newsXY_a.116830$JA5.2639499@news.xtra.co.nz...
"Eugene Rosenzweig" <ugn@hotmail.com> wrote in message
news:3f3b913f@news.comindico.com.au...
They got a free 30-day Demo or get them to send you a demo CD. Nothing
beats
checking it out for yourself. I had a look at the demo a while ago and I
remember it being quite a bit different. One thing I do remember is that
they now have integrated (schematic and footprint) libraries.

That's a bonus in itself. Too often had inconsistencies between the
libraries!


I only use the libries I create, which I hope will be supported by DXP. All
the footprints are crap, so I, along with a few other people, have created
all the footprints in the IPC standards and named them according to the IPC
number.

Protel 99SE actually came with a whole host of IPC standard footprints
in a seperate IPC library. Many of the IPC footprints are too big for
cutting edge work though, they try to be all things to all people...

I have not tried DXP, but the thing I hate is that all the new DXP
libraries aren't backward compatible with 99SE. We just had to spend
days creating a 956 pin BGA symbol, which was available in a DXP
library but not 99SE - bummer.

Dave
---------------------------
(remove the "_" from my email address to reply)

 

[The real Andy]

"David L. Jones" <tronnort_@yahoo.com> wrote in message
news:3f3caf86.464255@News.CIS.DFN.DE...

Protel 99SE actually came with a whole host of IPC standard footprints
in a seperate IPC library. Many of the IPC footprints are too big for
cutting edge work though, they try to be all things to all people...

Really?? I did not know this. I do get all those painful emails all the time
telling me that there is new Libraries available, never seen one refering to
IPC though.

I have not tried DXP, but the thing I hate is that all the new DXP
libraries aren't backward compatible with 99SE. We just had to spend
days creating a 956 pin BGA symbol, which was available in a DXP
library but not 99SE - bummer.

Its painful isn't it. Could you have downloaded the trial version and saved
the footprint as 99se?

I am heavily debating if i should look at buying DXP. At 8k US$ it must work
out to be around the AU$16K mark (upgrade is cheaper), which is a shitload
of cash for a piece of software. They must be creeping closer and closer to
the cadence stuff. The problem is that i know everyone is going to move
toward DXP and 99se is going to fall out of flavour, meaning no more
support....

 

[KLR]

On Fri, 15 Aug 2003 03:06:48 +1000, "Graham" <hurfy@alphalink.com.au>
wrote:

"Go and get fucked you piece of shit" is pretty much my standard
response to these telemarketing bastards if they ring with "private".

However I do politely tell them to go if they show ID.

how long will it take you to make me one ?

very long time as Im a very busy person

I think that something like this would be an excellent project for
silicon chip magazine though !!

I think that some sort of interface to the phone line (NOT using a
bloody PC) to "read" caller ID and then send a message to private
callers (or treat them as above) or have different ring sounds, voices
etc for different pre-programmed numbers (or special
tones/announcements to IDs such as "private" "payphone" "unavailable"
would be excellent too

I think would prove a VERY popular project ! I think even having a
project for experimenters showing them how to "read" the caller ID
data from a line - using (say) a pic would be a great start. HAving
this would then enable you to custom build your own system around it
and how to deal with certain numbers or IDs (or lack of)

As for approval - there have been many telephone projects published
over the years that clearly state that they arent approved for
connection to the phone network - but people surely still do this.

Another MUST would be to show type 2 caller ID (ie the ID of a person
who rings when you are on a call (call waiting)

Unless this has changed in recent months - Many phones and units on
the market DO NOT show this !!

Would also like a caller display unit that tells me who is calling..If my
mate Phil calls, I want it to say "Phil is calling" or even just
"Phil"..over and over.I have a caller display unit that talks the
number.this is the next step..I know I can look at the caller display unit
but why race to the phone to find out its someone you dont want to talk
to...From my point of view, phones haven't advanced much ..yeah, I know
technically they might have....but they still ring, we pick them up..

Well in the last 30 years or so that I have been old enough to know
how to use the phone etc, they have advanced a lot.

Things like STD dialling, speakerphones, cordless phones, fast
pushbutton DTMF dialling, Call waiting, caller ID, conference, one
touch redial - memory of numbers for fast dialling, call diversion,
SMS etc.

Not forgetting the fact that they have gone mobile of course !
(the crappy musical ringtones these days I hate though

Short of having some sort of telephone interface implanted in your
brain so you only had to "think" to call someone and "think" what you
say to them rather than having to physically speak it, I dont see how
much further phone technology can actually advance beyond its basic
current form of "having them ring and us picking them up and talking
into them". (or talking via a headset/hands free system etc)

 

[Stuart Anderson]

I doubt the little dog would have this much hardware inside them,
including the Faraday shielded enclosure for the electronics...

Better open her up, just to be sure.

 

[Stuart Anderson]

I've always wanted to get one of these implanted in my arm... the ultimate
keyless entry system

Like all foreign bodies there is a good chance that such a device will
migrate around the body causing all sorts of fun. In humans, the devices are
implanted in the hand in the meat between the thumb and first finger (from
memory). They are popular in south america where kidnappings are rife - in
addition to data about the person they also contain a GPS unit.

The problem is that if I want to break in, I need your arm. Now where's my
machete?

 

[Phil Allison]

"Demosthenes" <demosthenes@you.know.what.internode.ignorethisbit.on.net>
wrote in message news:3f3f7343@duster.adelaide.on.net...

Hi,

I live in Adelaide.. I want to rig up a FM stereo transmitter or two to
computers in the house so they can work as jukeboxes to a stereo in the
bathroom, etc - is this possible? On the cheap?

Thanks!

** Jaycar have two kits that do this, the Micromitter KC-5341 and the
Improved Minimitter KC-5310.

See www.jaycar.com.au



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