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PICList Thread
'[PICLIST] [EE] [OT]: Need to implement dongle func'
2000\07\07@192648 by dal wheeler

flavicon
face
Yep, them dongles are evil.
I have Microsim's PCBoards layout software, to which Orcad bought them out
and discontinued the board layout software.  So now I live in fear that my
dongle will die, and I'm without my $3000 investment.  Maybe design dongle
read code that free's up the dongle requirement in the event that the
company goes belly up to protect it's customers?

----- Original Message -----
From: "Bob Blick" <spam_OUTbobTakeThisOuTspamTED.NET>
> How about changing the topic to "Do you hate dongles?"
>
> I do.
>
> -Bob
>

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2000\07\10@132728 by David Duley

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face
On Fri, 7 Jul 2000 17:18:47 -0600, you wrote:

>Yep, them dongles are evil.
>I have Microsim's PCBoards layout software, to which Orcad bought them out
>and discontinued the board layout software.  So now I live in fear that my
>dongle will die, and I'm without my $3000 investment.  Maybe design dongle
>read code that free's up the dongle requirement in the event that the
>company goes belly up to protect it's customers?
>
>{Original Message removed}


'[PICLIST] [EE] [OT]'
2002\06\02@042606 by Dave King
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face
Hi

This is a bit of a strange question. I keep stumbling into strange (but
interesting)
projects to play with.

What is the maximum vibration level and/or G force standard smt or thruhole
will tolerate ?

I've been asked if I could figure out a electronic detonator for an
airburst charge
for snow guns. These are the guns/mortars they use to fire 4-8lb charges at
potential slides to trigger them. The trigger will be a pic that simply counts
and then fires a electric match after the preset delay.

I'm hoping this will prove tremendously difficult so I get to "work" and
have to blow
things up all winter ;-]

Tia

Dave

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2002\06\02@043435 by uter van ooijen & floortje hanneman

picon face
> What is the maximum vibration level and/or G force standard smt or
thruhole
> will tolerate ?

Wouldn't it make sense to regard the whole detonator as use-once? I guess
the price of a 12c508 would not add much to the total cost.

Wouter van Ooijen
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2002\06\02@050211 by Dave King

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At 10:25 PM 01/06/02 +0200, you wrote:
> > What is the maximum vibration level and/or G force standard smt or
>thruhole
> > will tolerate ?
>
>Wouldn't it make sense to regard the whole detonator as use-once? I guess
>the price of a 12c508 would not add much to the total cost.
>
>Wouter van Ooijen

It definitely is a use once ;-]  They shoot the charges 4-12km and each
shot costs
at least $75+. The idea is to allow an air burst so the full concussive
force hits the
snow. Its more effective than the standard fusing which simply hits and
buries into
the snow and explodes. The snow actually dampens the force enough to be
noticeable.

This would be a secondary fusing system so that if it was set right it
would go off just
above the snow but if it failed it will have the standard fusing. If it
works right they can
reduce the size of the charges or have to make fewer shots and more than
pay for the
pic.

Dave

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2002\06\02@055931 by Ashley Roll

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Hi Dave,

Now that sounds like a great fun project :)

I'm working on a timer for use in Amateur Rockets, you can get 30Gs or more
on the initial firing of a large motor..

I'm going to be using SMT components because of size and weight.. And
because of F=MA, the smaller the mass, the less force acting on the
component. However my timers are (hopefully) reused.. :)

If you were to arrange the PCB so the axis of acceleration goes through the
surface and "pushes" the components onto the board, I'd assume that you
wouldn't have any problems..

Also, I've heard (but have no evidence) that crystals are much more
sensitive to acceleration then resonators.. so be careful how you do your
oscillator. Maybe use the internal R/C oscillator and a special pre-trim
step prior to launch. Feed the PIC a known frequency so it can compute the
appropriate calibration value.. This would have to be done at ambient
temperature just before launch I would guess.

The hardest part will be determining when the unit is "fired" from the
cannon. You can get G-Switches but they aren't all that cheap.. Perhaps you
can arrange a "pull fuse" which is tethered so that it pulls out of the
timer half way along the cannon barrel - that way it won't affect the
accuracy of the projectile. Perhaps the cheapest way to do this is with a
thin wire loop through which a clip is inserted and a length of string ties
the clip to the back of the barrel. This is assuming that your launcher is
air powered..

Another alternative might be a light sensor - arrange a ring of bright
lights at the end of the barrel and a sensor on your board detects the pulse
of light as it passes.. Or even the dark to bright transition from the
daylight as the projectile exits the barrel..

You also need to think very carefully about safely arming and disarming the
device. You definitely don't what this going off in the gun or near you!

Good Luck!
Cheers,
Ash.

---
Ashley Roll
Digital Nemesis Pty Ltd
http://www.digitalnemesis.com
Mobile: +61 (0)417 705 718




> {Original Message removed}

2002\06\02@065927 by uter van ooijen & floortje hanneman

picon face
> > > What is the maximum vibration level and/or G force standard smt or
> >thruhole
> > > will tolerate ?

I could look up what we spec'ed for some electronics that had to be lauched
in a shuttle, but IIRC the circital point is not so much a single solder
joint but the amount of mass and area that can vibrate freely: small
chips(let's say up to DIL20) were not considered a problem at all (but
sockets were definitely out of the question, and definitely use
plated-through holes or even better solder both sides), wide DILs and larger
SMDs were regarded as potential problems (maybe even all SMDs), and so were
torroids and other things with more mass. And of course a substatial area of
PCB was a problem in itself, so there were metal supports that partitioned
the PCB so any part of a PCB was no more than a few centimeters from a
support. And I don't think this was done in our case, but I would put one of
the PCB axis pointing into the flight direction. And avoid Crystals or even
ceramic resonators. I guess the 12c508 build-in oscillator will be accurate
enough?

Note that you will have much more G force and much less vibration that we
had, so your problem area's might be a little bit different. A pity that you
will not likely have a failed PCB for post-mortem analysis.....

Wouter van Ooijen
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2002\06\02@070342 by uter van ooijen & floortje hanneman

picon face
> If you were to arrange the PCB so the axis of acceleration goes through
the
> surface and "pushes" the components onto the board, I'd assume that you
> wouldn't have any problems..

I would not do that unless the PCB is very small: it might bent and hence
(when the component is more stiff) the solder will crack.

Wouter

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2002\06\02@075106 by Ashley Roll

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face
Hi Wouter,

Good point, I had assumed that the board size would be quite small because
it would be the diameter of the projectile..

Are there any texts available on the design of electronics for high-G
environments? I'd be interested for my rocket timer project.. The board I'd
developing for that purpose will be mounted along the axis of acceleration
so flex isn't the problem, just the weight of the components.

I'm looking at a SOIC-28 '876 and a SMT resonator at present.. Also some
D2PAK (TO-252?) MOSFETs and mainly 0805 size resistors and caps.. Any hints?

Cheers,
Ash.

---
Ashley Roll
Digital Nemesis Pty Ltd
http://www.digitalnemesis.com
Mobile: +61 (0)417 705 718




> {Original Message removed}

2002\06\02@083619 by uter van ooijen & floortje hanneman

picon face
> Are there any texts available on the design of electronics for high-G
> environments? I'd be interested for my rocket timer project.. The board
I'd
> developing for that purpose will be mounted along the axis of acceleration
> so flex isn't the problem, just the weight of the components.

I am speaking only as someone who was marginally involved, not as a real
designer. But I would expect that a model rocket will not reach the noise
levels of a shuttle, and the size of the board is much smaller, so vibration
will be less of a problem. But I would still feel uneasy with crystals and
even resonators. With the board along the acceleration Axis I would go for
SMD whenever possible. Mount non-SMD in the accelaration direction. Worry
about the heaviest components first. What about the battery? Spring clips
would seem a very bad idea.

Wouter van Ooijen
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2002\06\02@091817 by Roman Black

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Ashley Roll wrote:
>
> Hi Wouter,
>
> Good point, I had assumed that the board size would be quite small because
> it would be the diameter of the projectile..
>
> Are there any texts available on the design of electronics for high-G
> environments? I'd be interested for my rocket timer project.. The board I'd
> developing for that purpose will be mounted along the axis of acceleration
> so flex isn't the problem, just the weight of the components.
>
> I'm looking at a SOIC-28 '876 and a SMT resonator at present.. Also some
> D2PAK (TO-252?) MOSFETs and mainly 0805 size resistors and caps.. Any hints?


This is a bit rough, but surely if you set the
circuit in epoxy it will be as solid as the parts
themselves, so you don't have to use SMD parts
unless you choose to and the failure limit will
be the parts themselves. In other words, set it
in solid plastic and don't worry because there is
nothing better you can do??
-Roman

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2002\06\02@102747 by Larry G. Nelson Sr.

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I have used crystals on fireworks shells with no problems. You may want to
be sure they are securely mounted and in the best orientation for
acceleration. Fireworks typically have worse acceleration since they are
launched with an explosive charge in a mortar and not over a longer time
period as with rocket engines.

Larry

At 07:56 PM 6/2/02 +1000, you wrote:
{Quote hidden}

> > {Original Message removed}

2002\06\02@110827 by Michael Johnston

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face
Larry
   my friend mark sullivan had a data logger based on a 17c42 for his
rockets.It used a 4 mhz crystal. He had problems trying to getting  it to
deployed his chute when the rocket was at it max altitude. It was pretty
cool what he had it doing it would tell how long the rocket was under power
and its max altitude. He never got the chute deployer working as far as i
know. It pierced the roof of a science building at a college i was attending
on one flight.
he got a bill from the college for $40.00  to fix the hole in the roof and i
think he didnt get what was left of the rocket back.
mike johnston
----- Original Message -----
From: "Larry G. Nelson Sr." <.....nrKILLspamspam@spam@MA.ULTRANET.COM>
To: <PICLISTspamKILLspamMITVMA.MIT.EDU>
Sent: Sunday, June 02, 2002 9:12 AM
Subject: Re: [EE] [OT]


{Quote hidden}

more
> >on the initial firing of a large motor..
> >
> >I'm going to be using SMT components because of size and weight.. And
> >because of F=MA, the smaller the mass, the less force acting on the
> >component. However my timers are (hopefully) reused.. :)
> >
> >If you were to arrange the PCB so the axis of acceleration goes through
the
> >surface and "pushes" the components onto the board, I'd assume that you
> >wouldn't have any problems..
> >
> >Also, I've heard (but have no evidence) that crystals are much more
> >sensitive to acceleration then resonators.. so be careful how you do your
> >oscillator. Maybe use the internal R/C oscillator and a special pre-trim
> >step prior to launch. Feed the PIC a known frequency so it can compute
the
> >appropriate calibration value.. This would have to be done at ambient
> >temperature just before launch I would guess.
> >
> >The hardest part will be determining when the unit is "fired" from the
> >cannon. You can get G-Switches but they aren't all that cheap.. Perhaps
you
> >can arrange a "pull fuse" which is tethered so that it pulls out of the
> >timer half way along the cannon barrel - that way it won't affect the
> >accuracy of the projectile. Perhaps the cheapest way to do this is with a
> >thin wire loop through which a clip is inserted and a length of string
ties
> >the clip to the back of the barrel. This is assuming that your launcher
is
> >air powered..
> >
> >Another alternative might be a light sensor - arrange a ring of bright
> >lights at the end of the barrel and a sensor on your board detects the
pulse
> >of light as it passes.. Or even the dark to bright transition from the
> >daylight as the projectile exits the barrel..
> >
> >You also need to think very carefully about safely arming and disarming
the
{Quote hidden}

> > > {Original Message removed}

2002\06\02@114407 by Michael Johnston

flavicon
face
Hi Ashley
My friend whom I described in an earlier post had his electronics mounted
on top of a 4 cell AA battery pack. His rocket was fiberglass and he had it
mounted in the middle of the rocket. it was rubber banded in. I'd give you
his email address but he doesn't like to talk about his rocket escapades ha
long story . It seem to work real well with a little hand held computer that
he'd written software for. I can't remember what the device was called but I
believe he told it was made in the uk. He would plug in to the hand held and
it would show the projectory and max altitude and thurst  of the rocket
engine. I was going to developed something similar for my radio control
aircraft but never got around to doing it. Mike Johnston
----- Original Message -----
From: "Ashley Roll" <.....ashKILLspamspam.....DIGITALNEMESIS.COM>
To: <EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU>
Sent: Sunday, June 02, 2002 6:48 AM
Subject: Re: [EE] [OT]


> Hi Wouter,
>
> Good point, I had assumed that the board size would be quite small because
> it would be the diameter of the projectile..
>
> Are there any texts available on the design of electronics for high-G
> environments? I'd be interested for my rocket timer project.. The board
I'd
> developing for that purpose will be mounted along the axis of acceleration
> so flex isn't the problem, just the weight of the components.
>
> I'm looking at a SOIC-28 '876 and a SMT resonator at present.. Also some
> D2PAK (TO-252?) MOSFETs and mainly 0805 size resistors and caps.. Any
hints?
{Quote hidden}

> > {Original Message removed}

2002\06\02@125600 by Shawn Mulligan

picon face
Our company designs tools for downhole drilling where considerations are
made for a high shock/temperature/pressure environments. Here are some
construction methods that work for us.

* Strain-relief all wires connecting to the board with a small loop (run
through and extra hole drilled next to the connection), then harden each
connection with a two-part hardening compound (epoxy).
* Choose a method to strain-relief all high-mass components (e.g.
electrolytics) to the board. Most vunerable are points where the lead
connects to the board and where it leaves the component.
* Seal the board with a hard or soft potting compound, but apply a layer of
silicon conformal coating first. The conformal coating is thin and flexible
and prevents the potting from flowing underneath components, which may
expand during curing and actually 'pop' SMD's off the board. And be prepared
for your board to act unpredictably until the potting is fully cured.
* Secure the power source as you do the PCB -- especially if an interruption
in power sends the rocket off course. It's good to construct power packs
from solder-tab batteries, then to pot the batteries. This may be cost
prohibitive, but perhaps rechargeables can be used.
* If possible, soft pot (a clear potting with the consistency of a firm
Jello, as opposed to hard epoxy potting) the circuit and power source into
the housing cavity.



> > Are there any texts available on the design of electronics for high-G


_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx

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2002\06\02@142938 by Mike Morris

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Hi,

There is already a commercial product available for this application called
"Magic Fire".  They were designed for the pyrotechnic industry to allow the
precise bursting of multiple firework shells simultaneously.  I also think
Disney uses them (or else have developed their own) with their air launch
system.

As I recall, it took a lot of R&D... not getting the units to survive
launch, or the timing, but the safety issues.  They must have the ability
to be remotely armed and disarmed. They must not have their own power
supply, but be charged immediately prior to launch by the firing
system.  This is obviously a very potentially dangerous, even lethal device
if it fails... prematurely detonating in the gun, or worse, when being
handled. I've never worked with these devices because the precision of
pyrotechnic timer fuses continues to improve and the cost of each igniter
is expensive to use in any kind of quantity (last I heard they were $5).
They must also be integrated into a shell or pyrotechnic device during
manufacturing, increasing their cost further.

Not trying to dissuade you from a cool project, but explosive applications
have *huge* risks involved. If you decide to try and develop your own
version, I hope you have some serious product liability insurance.  :)

- Mike

At 01:19 AM 6/2/2002 -0700, you wrote:
{Quote hidden}

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2002\06\02@151121 by Dave King

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Hi Ash

>Now that sounds like a great fun project :)

Not really but someone has to do it ;-]

>I'm working on a timer for use in Amateur Rockets, you can get 30Gs or more
>on the initial firing of a large motor..

I helped with an altimeter for a friends hi-powered "lawn dart" They are
getting those
things 10-15K off of the pad. It's amazing they get that high with only a
few seconds
burn time on the motors. I'm not sure what the actual G load is on these
guns but it should
be 100G plus. The altimeter was just thru hole with coating and it worked fine.

>I'm going to be using SMT components because of size and weight.. And
>because of F=MA, the smaller the mass, the less force acting on the
>component. However my timers are (hopefully) reused.. :)

The SMT seems to be the way to go.  It would cut the size and mass way down.

I'm not quite energetic enough to try and find something the size of a quarter
buried in snow somewhere on the side of a mountain ;-]

>Also, I've heard (but have no evidence) that crystals are much more
>sensitive to acceleration then resonators.. so be careful how you do your
>oscillator. Maybe use the internal R/C oscillator and a special pre-trim
>step prior to launch. Feed the PIC a known frequency so it can compute the
>appropriate calibration value.. This would have to be done at ambient
>temperature just before launch I would guess.

The hardest part about doing this is the "operators" in my case. It would
have to occur without user intervention. The guys using these are not techies,
are generally cold, wearing gloves and could care less (from what I've seen)
If I can figure out how to do this without them having to take off the
gloves they
would do it. ;-]

>  Perhaps the cheapest way to do this is with a
>thin wire loop through which a clip is inserted and a length of string ties
>the clip to the back of the barrel. This is assuming that your launcher is
>air powered..
The lanyard is how they want to do it. Its pretty simple, cheap and reliable.
All of this has to function reliably in some fairly harsh conditions.

>You also need to think very carefully about safely arming and disarming the
>device. You definitely don't what this going off in the gun or near you!
Well right now I'm working with 4 distinct steps to arm or disarm.
Reversing any of the
4 would stop the fuse easily. Even with one of the small charges (about
4lbs I think)
you have to run pretty damn fast to escape the blast radius. Currently they
are doing
this with burning fuses. so the only safety is to fire it or yank it apart.

Dave

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2002\06\02@175227 by Larry G. Nelson Sr.

flavicon
face
I know. I designed it for them. Magic fire also has the design for
avalanche control. Talk to Paul over there and he can give you the details
and prices.
Larry


At 11:26 AM 6/2/02 -0700, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
L.Nelsonspamspam_OUTieee.org
http://www.ultranet.com/~nr

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2002\06\02@175354 by Larry G. Nelson Sr.

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face
The unit from magic fire is considered one time use but we have recovered
several and when tested they still work. For safety I suggest you never
reuse them in something that is so safety critical.
Larry

At 11:49 AM 6/2/02 -0700, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
@spam@L.NelsonKILLspamspamieee.org
http://www.ultranet.com/~nr

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2002\06\02@185106 by Dave King

flavicon
face
>Not trying to dissuade you from a cool project, but explosive applications
>have *huge* risks involved. If you decide to try and develop your own
>version, I hope you have some serious product liability insurance.  :)
>
>- Mike

No problem. As interesting as the project is, everyone is acutely aware of
just how deadly
it could be. They did look at the "Magic Fire" system but it was
incompatible with the
newer guns and how they are used. They also had problems with the price and a
few other things so decided to look at a different system.

There will be a development period and testing before it ever gets to the
end user.
And that will involve a lot of shots of dummy rounds to test all aspect of
the system
out.

Dave

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2002\06\02@233304 by Larry G. Nelson Sr.

flavicon
face
Did they ask about a version that would be compatible. I know they have
done many different custom applications. If it is price then that is a
different matter since a custom would not likely be any cheaper.
Larry

At 03:45 PM 6/2/02 -0700, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
KILLspamL.NelsonKILLspamspamieee.org
http://www.ultranet.com/~nr

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'How to drop unwanted groups, i.e. [EE] [OT] etc?'
2004\01\10@100903 by Leonard Gabrielson
picon face
Please tell me how to stop getting email from unwanted groups, ie [OT] etc.  
Thanks!!

(Can't keep my trash emptied!)

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2004\01\10@102940 by Mauricio Jancic

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You must filter messages with [OT] in the subject with your email program...

Mauricio D. Jancic
Janso Desarrollos - Microchip Consultant
http://www.janso.com.ar
spamBeGoneinfospamBeGonespamjanso.com.ar
(54) - 11 - 4542 - 3519
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Capital Federal
Republica Argentina
(54) - 11 - 4542 - 3519
MSN: TakeThisOuTjansodesarrollosEraseMEspamspam_OUThotmail.com
>>{Original Message removed}

2004\01\10@103355 by Edward Gisske

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Also messages with [OT:] and [OT]:


----- Original Message -----
From: "Mauricio Jancic" <RemoveMEjancicspamTakeThisOuTARNET.COM.AR>
To: <PICLISTEraseMEspam.....MITVMA.MIT.EDU>
Sent: Saturday, January 10, 2004 9:28 AM
Subject: Re: How to drop unwanted groups, i.e. [EE] [OT] etc?


You must filter messages with [OT] in the subject with your email program...

Mauricio D. Jancic
Janso Desarrollos - Microchip Consultant
http://www.janso.com.ar
EraseMEinfospamjanso.com.ar
(54) - 11 - 4542 - 3519
Lugones 3238 "B" - C1430ECN
Capital Federal
Republica Argentina
(54) - 11 - 4542 - 3519
MSN: RemoveMEjansodesarrollosEraseMEspamEraseMEhotmail.com

>>{Original Message removed}

2004\01\10@123446 by Josh Koffman

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Leonard Gabrielson wrote:
> Please tell me how to stop getting email from unwanted groups, ie [OT] etc.

You can set the list server to not send you posts based on their topic
tags. Check out the list FAQ at
http://www.piclist.com/techref/piclist/listfaq.htm

Josh Koffman
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email RemoveMElistservspam_OUTspamKILLspammitvma.mit.edu with SET PICList DIGEST in the body

2004\01\10@123902 by Bob Barr

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face
No, these two replies represent one way to stop unwanted email but
it's not necessary to filter by subject keywords in your email reader.

Your signup with the piclist mailer can be configured so as to only
send messages for the topics which you choose to allow it to.

Since I don't use this feature myself, I have forgotten exactly how
it's done. Someone should be along shortly with the details.


Regards, Bob

On Sat, 10 Jan 2004 09:31:36 -0600, Edward Gisske wrote:

{Quote hidden}

>>>{Original Message removed}

2004\01\10@125523 by Larry Green

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Subject: Re: How to drop unwanted groups, i.e. [EE] [OT] etc?


> No, these two replies represent one way to stop unwanted email but
> it's not necessary to filter by subject keywords in your email reader.
>
> Your signup with the piclist mailer can be configured so as to only
> send messages for the topics which you choose to allow it to.
>
> Since I don't use this feature myself, I have forgotten exactly how
> it's done. Someone should be along shortly with the details.
>
>
> Regards, Bob

I just extracted the info below from the huge amount of information I got when I
joined the list. Read it well then click on the CORRECT link to either get posts
or OPT OUT from posts by subject header. I was swamped with emails too until I
slimmed it down to just the posts/groups I was interested in! Just click on the
correct link and hit <Send> on your mail reader (there is no need to do/add
anything else) and you will get a confirmation email back to say your status has
changed.

HTH

Larry

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

You can now turn on or off any of the topic channels by sending SET PICLIST
TOPICS: followed by a plus or minus sign and the topic tag (without the
colon) to spamBeGoneLISTSERVSTOPspamspamEraseMEMITVMA.MIT.EDU.

If you don't want advertisements, click on:
KILLspamLISTSERVspamBeGonespamMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-%5BAD%5D> or if you do:
EraseMELISTSERVspamEraseMEMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20+%5BAD%5D

If you don't want posts that are not about PICs or at least electrical
engineering, turn off the [OT]: channel by clicking on:
@spam@LISTSERV@spam@spamspam_OUTMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-%5BOT%5D> when you get board try:
spamBeGoneLISTSERVspamKILLspamMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20+%5BOT%5D

For no general engineering (but still PIC engineering) posts use:
.....LISTSERVspam_OUTspamMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-%5BEE%5D> or turn [EE]: back on with
TakeThisOuTLISTSERV.....spamTakeThisOuTMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20+%5BEE%5D

If you don't care to hear about the Atmel AVR processors, click on:
TakeThisOuTLISTSERVKILLspamspamspamMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-%5BAVR%5D> or if you do:
.....LISTSERVspamRemoveMEMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20+%5BAVR%5D

If you don't care to hear about the Scenix SX processors, click on:
RemoveMELISTSERVspamspamBeGoneMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-%5BSX%5D> or if you do:
spamBeGoneLISTSERV@spam@spamspam_OUTMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20+%5BSX%5D

One special channel that should be mentioned is the Other: channel. This is
were posts that don't have the correct topic tags are sent. If you are
seeing untagged post, you have the Other: channel enabled. You can turn off
the Other: channel by sending SET PICLIST TOPICS: -Other to
TakeThisOuTLISTSERVspamspamMITVMA.MIT.EDU
LISTSERVEraseMEspamMITVMA.MIT.EDU?body=SET%20PICLIST%20TOPICS:%20-other

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2004\01\10@132714 by p.cousens

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I would also like to add that you should TOTALLY IGNORE the first two
replies
And only use the piclist listserver to change your sign up options

Any other way selfishly ignores MIT's bandwidth usage for the piclist
P.cousens

{Original Message removed}

2004\01\10@153944 by Denny Esterline

picon face
To not receive the messages it's best to follow the instructions halfway
down this page http://www.piclist.com/techref/piclist/index.htm

But I don't understand all the grief about the colon inside or out. I just
set my filters to look for [OT and it's irrelevant where the colon is.
-Denny

{Quote hidden}

program...
{Quote hidden}

> >>{Original Message removed}


'[PIC] [EE] [OT] Parallax bluetooth module'
2006\02\22@224550 by Mario Mendes Jr.
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Has anyone used one of these or something similar?  How happy are you
with it?  Comments on price to value ratio are welcome.  If you used
something similar let me know what it is.  I'm sure this has been
discussed in the list before, but when I tried searching the piclist
archive but I did not get any hits back (maybe the server had the
hickups).

Thanks

-Mario

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