PRC as a amplifier in GPS question.

[Franc Zabkar]

On Thu, 08 Dec 2005 09:43:30 +1100, Clifford Heath
<no.spam@please.net> put finger to keyboard and composed:

Franc Zabkar wrote:
IIRC the flasher is also required to turn on as soon as the indicator
switch is activated.

Have you got a reference for that?

Sorry, I checked my old ADRs (1982) but couldn't find anything. ADR 6
should cover direction indicators.

Because as noted, the
electro-mech ones don't generally do it. I know the one
in my car doesn't, and I'd like to fix that without having
to build my own. If flashers are now required to do it,
I'd have a reason to get a refund on one that didn't .

The other problem with most 555 circuits (and the inverter
circuit mentioned) is that the first half-cycle takes
noticeably longer. A flasher circuit shouldn't do that.
Any clever ideas about how to design this behaviour? Apart
from the obvious one of using dividers etc...

Clifford Heath.

I found a writeup for an old magazine project. ETI327 is a turn/hazard
indicator with an audio output. It uses two 555s, an audio oscillator
and a flasher. The flasher is a free running oscillator, so it looks
like I may be wrong. Of course the requirements may have changed since
then.

But then there is this info from a Bosch Technical Instruction
booklet, "Electronics (2) Automotive Applications".

====================================================================
"German traffic regulations prescribe 60 ... 120 switching cycles per
minute as the signalling frequency. The time when the lamps are lit
must be between 30 and 80% of the turn signal switching period. For
traffic safety reasons, the turn signal should light when first
switched on. Furthermore, German traffic regulations prescribe that
the failure of one of the turn signal lamps is to be indicated clearly
to the driver, for example, by doubling the signaling frequency or by
the indicator lamp remaining unlit."
====================================================================

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Thu, 08 Dec 2005 09:43:30 +1100, Clifford Heath
<no.spam@please.net> put finger to keyboard and composed:

Franc Zabkar wrote:
IIRC the flasher is also required to turn on as soon as the indicator
switch is activated.

Have you got a reference for that? Because as noted, the
electro-mech ones don't generally do it.

The mechanical flashers require that lamp current flows through a
bimetallic strip which opens after it heats up. The electrical contact
is re-established after the strip cools down. If no current flows at
switch on, then what heats the bimetallic strip?

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Thu, 08 Dec 2005 16:31:55 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

On Thu, 08 Dec 2005 09:43:30 +1100, Clifford Heath
no.spam@please.net> put finger to keyboard and composed:

Franc Zabkar wrote:
IIRC the flasher is also required to turn on as soon as the indicator
switch is activated.

Have you got a reference for that? Because as noted, the
electro-mech ones don't generally do it.

The mechanical flashers require that lamp current flows through a
bimetallic strip which opens after it heats up. The electrical contact
is re-established after the strip cools down. If no current flows at
switch on, then what heats the bimetallic strip?

Oops, you wrote "electro-mechanical". Sorry.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

 

[The Red Krawler]

"Jean-Paul Turcaud" <xyz@atlante.edu> wrote in message
news:dn8at5$eia$1@aphrodite.grec.isp.9tel.net...

Please note the only type of Official thanks one can expect from the Land
of
Bastards, after 35 years of exploitation by the australian Toads of the
Great Sandy Desert Discoveries ! ...and from one great, gallant &
generous
Mining Pioneer that australian manure at large has run to the gutter !

<snip lots more rantings>

You, sir, speak a lot of shit.

 

[Rainbow Warrior]

Speak sensibly or rack off nz/yank/french cross dilbit.

"Jean-Paul Turcaud" <xyz@atlante.edu> wrote in message
news:dn73ij$3bb$1@apollon.grec.isp.9tel.net...

This is to wish you all Bastards an excellent Xmas season, as from today
to
New Years Eve.

I wish you all an excellent 9.2 Sydney Quake, plus of course the
following
100 ft Tsunami to thank you of your 35 years duration Collective Crimes !
... and of course as a result of the devastated reservoirs overflowing
with
sea water, an excellent soup on New Years Eve with all the prawns &
sharks
you will gather in the Blue Mountains

That will serve you right as a Collective Punishment, and if you find
time
left over running about your drenched things, have fun visiting the Sydney
Harbour Bridge & that sails-rigged ragged then Opera House reunited in a
final embrace.... 20 miles inland !

The next winter Solstice seems to me an excellent time window for that,
and
further still, this was the one chosen by our Almighty Creator for the
Banda Ashe Quake, and for that lesson in morality taught to the World,
that
rules of Decency & Justice must be applied. ( Obviously needed Divine
lesson
! )

This is the point of all those god sent reminders, to teach a erring
Humanity about the elementary rules of life ... and if impervious to that,
all spared until now, may be could be all whisked into Eternity at the
blink
of an eye.
In any case and in application of the Rules presiding over Earth
Expansion,
the 9.2 Sydney Quake will be a soon forgotten epi-phenomena written in the
whole Earth History Clay Tablets,
( clay; mudstone, shale, slate, phyllite, shist, mica-shist, garnet shist,
chlorite shist ... a big big book only True Geologists know to read )
... and his continuous drift of our planet Earth from Mother Star toward
Pluto ... and beyond !

A VERY TRIFLING EVENT INDEED IN THE GLOBAL PERSPECTIVE OF OUR PERMANENT
DRIFT ON THE ECLIPTIC ... EVEN IF THE DEATH TOLL IS TO TOP 5000 000 !

... AND ALL THINGS CONSIDERED A VERY SMALL PRICE TO PAY IF OF THE SUCH
EVENT EMERGES A NEW LEVEL OF CONSCIENCE WITH REGARDS TO THE COLLECTIVE
RESPONSIBILITY & COLLECTIVE PUNISHMENT IN CASE OF COLLECTIVE CRIMES !!!!

With kindest regards

( and if you don't like what I said, just run for your life if you live on
australia's Eastern Border !)


Jean-Paul Turcaud
Exploration Geologist
Founder of the True Geology

Australia Mining Pioneer
Discoverer and Legal Owner of Telfer, Nifty & Kintyre Mines
The Great Sandy Desert of Australia

* The "Golden Rule" or true story of the Discovery of the Telfer Mine
Author Bob Sheppard President of the APLA (Australian Prospectors' Union)
http://www.tnet.com.au/~warrigal/grule.html ,

* As well as Dr Don Findlay's Geological Site
http://users.indigo.net.au/don/tel/index.html

~~ Ignorance Is The Cosmic Sin, The One Never Forgiven ! ~~

 

[Wally Anglesea™]

On Thu, 08 Dec 2005 08:56:14 GMT, "Rainbow Warrior" <pizza@sbs.com.fr>
wrote:

Speak sensibly or rack off nz/yank/french cross dilbit.
he's 100% a french nitwit.

--

Read all about Australia's biggest doomsday cult:
http://users.bigpond.net.au/wanglese/pebble.htm

"You can't fool me, it's turtles all the way down"

 

[Jasen Betts]

On 2005-12-07, Clifford Heath <no.spam@please.net> wrote:

Franc Zabkar wrote:
IIRC the flasher is also required to turn on as soon as the indicator
switch is activated.

Have you got a reference for that? Because as noted, the
electro-mech ones don't generally do it. I know the one
in my car doesn't, and I'd like to fix that without having
to build my own. If flashers are now required to do it,
I'd have a reason to get a refund on one that didn't .

The other problem with most 555 circuits (and the inverter
circuit mentioned) is that the first half-cycle takes
noticeably longer. A flasher circuit shouldn't do that.
Any clever ideas about how to design this behaviour? Apart
from the obvious one of using dividers etc...

if you're switching the power to the circuit split the timing
capacitor between the rails with a 2:1 ratio. put the 2 on top
if you want the output to start low (other way up for low)

if you're not switching the power you need a pull-down (or up)
to 2/3 (or 1/3) rail voltage in the timing capacitors chip end.
while dormant (and it should switch off when it's to wake up)

--

Bye.
Jasen

 

[Bob Parker]

You know what they say David, you gotta stick with your mates!!
Season's greetings to you, and best wishes for next year and very many
after that.

Rgds
Bob


On Wed, 07 Dec 2005 22:58:44 GMT, quietguy
<quietguy@REMOVE-TO-REPLYconfidential-counselling.com> wrote:

...and may the great glue God visit YOUR coffee cup handle.....

David

PS Hope you have a great Christmas Bob, and your New Year is filled with good
health, love, and peace

Bob Parker wrote:

I see you haven't moved since last time we were in contact, David!
Watch out for those rogue technicians who sabotage coffee mugs...

Bob

 

[Phil Allison]

"aa" <nospamtomeplease@tiscali.dk>

Dear clever folks;

** Pocket pisser......

I live in Denmark have a bought a fine American telephone.

** Really.

How fucking amazing !!!!

Some Saab paddling wop buys a Yankee model phone that is ILLEGAL to use in
Denmark.

The Caller ID function doesn't work, since we use a different system
here. (America uses Bellcore FSK, Denmark uses DMTF).

** Huh ?

Caller ID works independently of the phone.

Get a display unit for a few Krone anywhere ....




......... Phil

 

[Trevor Wilson]

"moby" <moby@kcbbs.gen.nz> wrote in message
news:1134070467.764050.253740@g47g2000cwa.googlegroups.com...

Trevor Wilson wrote:
**Carver actually used two separate and equally bad technologies to build
his lightweight products. They were:

* TRIAC controlled power supplies.
(snip)
* Rail switching technology. Rail switching amps (aka: Class H, Power
Envelope, etc) have been tried and dismissed by quite a number of
manufacturers. Marantz, Yamaha, Hitachi, NAD, et al, have all tried it.
All
have dismissed the technology, because the result is a poorer sound
quality
than regular, non-rail switching amplifiers. The problem relates to the
enormous characteristic changes inherent to ALL active devices, as the
rail
Voltage is altered. IOW: Such amplifiers perform extremely well under
steady
state, sine wave conditions, but poorly under actual, real life music.

That must be why you see so many Marantz, Yamaha, Hitachi & NAD powered
theatre & stadium concert PA rigs, wheras the minnows of the PA world
like
Crown, QSC, BSS,LabGruppen etc have no problem with rail switching and
rail
riding technology

**Of course. Such amps are rarely used in critical listening situations.
Power output, cost and size and the over-riding factors.


--
Trevor Wilson
www.rageaudio.com.au

 

[Trevor Wilson]

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4398BD45.FB8CD042@hotmail.com...

Trevor Wilson wrote:

"moby" <moby@kcbbs.gen.nz> wrote in message
news:1134070467.764050.253740@g47g2000cwa.googlegroups.com...

Trevor Wilson wrote:
**Carver actually used two separate and equally bad technologies to
build
his lightweight products. They were:

* TRIAC controlled power supplies.
(snip)
* Rail switching technology. Rail switching amps (aka: Class H, Power
Envelope, etc) have been tried and dismissed by quite a number of
manufacturers. Marantz, Yamaha, Hitachi, NAD, et al, have all tried
it.
All
have dismissed the technology, because the result is a poorer sound
quality
than regular, non-rail switching amplifiers. The problem relates to
the
enormous characteristic changes inherent to ALL active devices, as the
rail
Voltage is altered. IOW: Such amplifiers perform extremely well under
steady
state, sine wave conditions, but poorly under actual, real life music.

That must be why you see so many Marantz, Yamaha, Hitachi & NAD powered
theatre & stadium concert PA rigs, wheras the minnows of the PA world
like
Crown, QSC, BSS,LabGruppen etc have no problem with rail switching and
rail
riding technology

**Of course. Such amps are rarely used in critical listening situations.
Power output, cost and size and the over-riding factors.

The feedthrough from the rail switching into the audio path is actually
minute.

**Perhaps. That is not the major part of the problem. Examine the curves of
the output devices. Look at the difference in characteristics with different
VCE applied.

I've designed several rail switching amps for SR use. As Arny says though,
there
is considerable extra complexity in the bits so I wouldn't use the method
much
below the 400-500 wpc category.

**You may not. All the companies I quoted did use them in lower powered
amps. NAD have used rail switchers in amps with continuous power outputs as
low as 30 Watts.


--
Trevor Wilson
www.rageaudio.com.au

 

[mitch]

"^Temuchin^" <mail@temuchins.com> wrote in message
news:4398e046$0$22270$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

mitch wrote:
"^Temuchin^" <mail@temuchins.com> wrote in message
news:4398ac2e$0$22290$5a62ac22@per-qv1-newsreader-01.iinet.net.au...

So your gonna blow up the Newcastle Big Penis???
It is more properly referred to as the Foreshore Erection.


Who calls it that? I have never heard that before

aybe you are thinking of what the judge called you

More like the Brewery Big Dick... I'm sure it's been the source of many a
funny photo

I remember climbing it when i was about 13, I had the flu really bad.

I was just about to come down and I sneezed, a large yellow goober shot
out my mouth and i watched in shock as it sailed down and got a bald guy
on the head. Seemed to take forever to sail down but you could see where
it was headed

Lol.

 

[ant]

George Orwell wrote:

Does Jean-Paul Turcaud like bumsex?

Doubtless.

--
ant

 

[Jordan]

Jasen Betts wrote:

Can you please explain the use of the inverter? Does the circuit "sleep"
until the blinker switch is activated?


yeah that was the idea. it's to get it to sleep




/
||/
|/~
+-[22R]-|
| |\
| | \
/ \
| / |
|/ | o-+-----
pin3 ----------+---| +----o---- |
| |\ 0-)--+--
+->|--+ | \| | |
| ~\ +--|<-+ |
| | | |
pin2-[100K]-+-------------(----[1K]--------+--|<----+
|
-----
/////

Thanks for the nice ascii work.

I made something which is running well on the bench.
I'm using diodes to select which of two transistors will be powered up,
along with the 555, from the blinker switch wired to supply power.
I'm bringing out 2 wires to provide a visual indicator that it's
flashing - an LED in series from pin 3. It's a bit of a spaghetti
junction, with 7 wires coming from my flasher unit:

1. input left
2. input right
3. indicator in (to dash LED)
4. indicator out
5. output left
6. output right
7. earth

Comments:

- There's a small delay, but not as long as it takes to give a hand signal.
- No lamp failure feature, which would be nice but at least there are no
filaments.
- Wiring is not conventional. I'd like to try the suggestion using the
inverter, if that makes it more like "standard".

Thanks to all for your help
Jordan

 

[Arny Krueger]

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4398BD45.FB8CD042@hotmail.com...

Trevor Wilson wrote:

**Of course. Such amps are rarely used in critical listening situations.
Power output, cost and size and the over-riding factors.

The feedthrough from the rail switching into the audio path is actually
minute.

Agreed.

I've designed several rail switching amps for SR use. As Arny says though,
there
is considerable extra complexity in the bits so I wouldn't use the method
much
below the 400-500 wpc category.

Trevor would also have us believe that its very common for home audio
systems to have 400-500 wpc amps.

I long ago learned that Trevor does a lot of audio power amp sound quality
evaluation with his head in the schematic diagrams. It's a lot less work
than proper bias controlled testing. ;-)

 

[Arny Krueger]

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:4398c52d@news.comindico.com.au...

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4398BD45.FB8CD042@hotmail.com...


The feedthrough from the rail switching into the audio path is actually
minute.

**Perhaps. That is not the major part of the problem. Examine the curves
of the output devices. Look at the difference in characteristics with
different VCE applied.

The VCE of the output stage is constantly changing, anyway. Bipolar
transistors have high collector impedances which mean that they tend to
reject the effects of changes in VCE.

The possibility of changes in VCE due to rail switching affecting the
performance of the amplifier *is* the "feedtrhough" that Graham was
mentioning.

I've designed several rail switching amps for SR use. As Arny says
though, there is considerable extra complexity in the bits so I wouldn't
use the method much below the 400-500 wpc category.

**You may not. All the companies I quoted did use them in lower powered
amps.

Hmm, didn't you just say that one such amp used rail switching to achieve
400 wpc?

NAD have used rail switchers in amps with continuous power outputs as low
as 30 Watts.

You're being deceptive again Trevor, by not admitting that with the
rail-switching active in high-power mode, the amps output was considerably
greater.

 

[Arny Krueger]

"Iain Churches" <taelNOSPAM@kolumbus.fi> wrote in message
news:dnbp62$nk1$1@phys-news4.kolumbus.fi...

I don't know the situation in Oz, but in Europe, Crown is often found in
broadcast and recording studios.

The modern Crown amps I've tested have had breathtakingly good performance.
Sound great, too.

 

[Arny Krueger]

"Iain Churches" <taelNOSPAM@kolumbus.fi> wrote in message
news:dnc4bu$i1a$1@phys-news4.kolumbus.fi...

"Arny Krueger" <arnyk@hotpop.com> wrote in message
news:I4OdnaFaOuCzEQTeRVn-pQ@comcast.com...

"Iain Churches" <taelNOSPAM@kolumbus.fi> wrote in message
news:dnbp62$nk1$1@phys-news4.kolumbus.fi...

I don't know the situation in Oz, but in Europe, Crown is often found in
broadcast and recording studios.

The modern Crown amps I've tested have had breathtakingly good
performance. Sound great, too.

Is that the Crown K series or Macro Tech, Arny?

Neither.

We have a K2, and also two old but incredibly reliable DC300A.

They seem to be highly regarded

There's been a lot of good Crown amps since the DC300A.

Iain

 

[Jasen Betts]

On 2005-12-09, Jason S <jst3712@iprimus.com.au> wrote:

I need to make a circuit that will produce either one, two or three short
consecutive beeps depending on the input signal it recieves.
For example:

Input 1 = One beep (could mean 'ON').
Input 2 = Two beeps (could mean 'OFF').
Input 3 = Three beeps (could mean 'ERROR')..

This is just an example. The 3rd one is not critical, but would be nice.

I want to be able to add it to practically any circuit which will provide
audible confirmation of the circuit's current operation. I was thinking of
using a PIC to do this, but is last resort (as I know absolutely nothing
about them).

Has anyone got any suggestions?

If you know nothing about PICSs use an AVR instead their chips are a little
more flexible one good feature is 2.7v-6v operation - handy for battery
powered devices a hardware and software to program them is about the same
price, (prebuilt/kit/diy)

some questions:

1 are the beeps to repeat or are they edge triggered?

2 what if imput 1 activates after input 3 had activated
and sounded 2 beeps already?



--

Bye.
Jasen

 

[Franc Zabkar]

On Fri, 9 Dec 2005 16:42:19 +1100, "Lord-Data" <data@ihug.com.au> put
finger to keyboard and composed:

How big is the FBT for a CRT that size?

Well, its p/n is ETF14L20B. The service manual has a scaled up circuit
layout. Using the H&V oscillator IC (AN2510S) for comparison, I'd say
the scale factor is about 4:1 which means the FBT's footprint would
have been about 21mm x 16mm. In the exploded diagram the FBT looks
about as high as it is wide, so my best guess is 21 x 16 x 16mm.

"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:khifp19073lovhcp81pr9qodj1t0t2gg52@4ax.com...
On Wed, 07 Dec 2005 00:04:20 +1030, John
sittinginthepool@internode.on.net> put finger to keyboard and
composed:

My Sony CCD TR55e camcorder which I got as a faulty item
won't play tapes but does have a working viewfinder ....

Looking through this unit it looks like a black and white CRT picture
but if you take the eyepiece off there is a small square white screen
about 1x1 cm across. Anyone know if this is indeed a CRT and if
so how small can you make the little buggers?

I once had to replace a faulty flyback transformer in a National VHS
camcorder viewfinder. It had a monochrome CRT.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.