Op amps problem Gain Calculation

Carmen · Jul 11, 2005

Gunner wrote:

"Carmen" <carmensrt@XXhotmail.com> wrote in
news:mzMCb.12367$T14.6505
@bignews3.bellsouth.net:

Bill Chaplin wrote:
Don't know what quality grass whomever was smoking but that cheap
piece o guano was never near a military base let alone used on
one!
That is the junk kit issued as part of the schlock electronic
"schools" of the mid-late 60's There are thousands in every land
fills in the country,came without crystal osc. so were just a
gradeschool toy? Sorry Bill

DH said he used one in the electronics calibration lab on the USS
Okinawa when it was still in service. They were being phased out,
but they were there.

Thanks Carmen If you could give BD my email Addy that would be good

BD? I'd be glad to pass it on if I knew who that was?

Take care,
Carmen

Seb · Jul 11, 2005

NO SHIT SHERLOCK

Seb · Jul 11, 2005

"Dr Halonfire$" <sharron_field@hotmail.nospam.com> wrote in message
news:c4vcnm$bcf$1@titan.btinternet.com...

Seb wrote:
NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related to Jack
Shit by marriage. I can't remember if they are related to Arthur Fucksake?

I see that somewhere, Its was well funny...

But to the point, why do people post these stupid virus warning?
Were not dumb, We know what they are...

Dr Halonfire$ · Jul 11, 2005

Seb wrote:

NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related to Jack
Shit by marriage. I can't remember if they are related to Arthur Fucksake?
--
Pig out on the UKs CHEAPEST utilities + FREE phone calls without
changing your line. : http://tinyurl.com/3ff7m My website is at
http://tinyurl.com/t7tg Watch the PowerPoint Presentation. :-
http://www.geocities.com/spmf38/ServicesPresenterV6.ppt

---
Outgoing mail is certified Virus Free.
Idiot-proofing is another matter
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.653 / Virus Database: 418 - Release Date: 06/04/2004

Adrian Miles-Davros · Jul 11, 2005

"Seb" <seb.elmy@dsl.pipex.com> wrote in message
news:407339d1$0$6542$cc9e4d1f@news-text.dial.pipex.com...

"Dr Halonfire$" <sharron_field@hotmail.nospam.com> wrote in message
news:c4vcnm$bcf$1@titan.btinternet.com...
Seb wrote:
NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related to Jack
Shit by marriage. I can't remember if they are related to Arthur
Fucksake?

I see that somewhere, Its was well funny...

But to the point, why do people post these stupid virus warning?
Were not dumb, We know what they are...

Unfortunately Seb there are people out there who are dumb, or if not dumb,

just plain gullible. For example I've been telling someone for weeks now
that they had a virus on their machine, and they wouldn't believe till they
got their phone bill last week, which was Ł600 for the quarter, and sure
enough their machine had been dialling out a premium based number.

When I checked the machine, it actually had 9 separate viruses on it, and 4
diallers, which were luckily conflicting with one another. Their anti virus
software was 5 years out of date, and they said "Oh I thought AOL stopped
the viruses coming on!"

Now I realise she is an extreme case, but their are a lot of people out
there with no knowledge whatsoever of computers, they even have to take
their machines to a technician to load a new programme on it for them.

Adrian
------------------------------------------------------------------
All emails to my address are blocked, except for those on my contact list.
Therefore to those who I do not already exchange emails with please post
letting me know you wish to send a personal email, and I will add you to my
contact list.

Dr Halonfire$ · Jul 11, 2005

Adrian Miles-Davros wrote:

"Seb" <seb.elmy@dsl.pipex.com> wrote in message
news:407339d1$0$6542$cc9e4d1f@news-text.dial.pipex.com...
"Dr Halonfire$" <sharron_field@hotmail.nospam.com> wrote in message
news:c4vcnm$bcf$1@titan.btinternet.com...
Seb wrote:
NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related
to Jack Shit by marriage. I can't remember if they are related to
Arthur Fucksake?

I see that somewhere, Its was well funny...

But to the point, why do people post these stupid virus warning?
Were not dumb, We know what they are...

Unfortunately Seb there are people out there who are dumb, or if not
dumb, just plain gullible. For example I've been telling someone
for weeks now that they had a virus on their machine, and they
wouldn't believe till they got their phone bill last week, which was
Ł600 for the quarter, and sure enough their machine had been
dialling out a premium based number.

When I checked the machine, it actually had 9 separate viruses on
it, and 4 diallers, which were luckily conflicting with one another.
Their anti virus software was 5 years out of date, and they said
"Oh I thought AOL stopped the viruses coming on!"

Now I realise she is an extreme case, but their are a lot of people
out there with no knowledge whatsoever of computers, they even have
to take their machines to a technician to load a new programme on it
for them.

It must be aol users are just generally moronic. : I have a friend who uses

aol and who won't let me near her PC because she knows I'll install
antivirus on it. : She sys she has no need for extra programs which she
can't understand, as she keeps telling Microsoft each time she installs the
latest update which they send her by email!!!

---
Outgoing mail is certified Virus Free.
Idiot-proofing is another matter
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.654 / Virus Database: 419 - Release Date: 06/04/2004

Çheetah! · Jul 11, 2005

Look you stupid sons-a-bitches, quit crossposting this shit to
alt.crossover!

Adrian Miles-Davros wrote:

"Seb" <seb.elmy@dsl.pipex.com> wrote in message
news:407339d1$0$6542$cc9e4d1f@news-text.dial.pipex.com...
"Dr Halonfire$" <sharron_field@hotmail.nospam.com> wrote in message
news:c4vcnm$bcf$1@titan.btinternet.com...
Seb wrote:
NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related to Jack
Shit by marriage. I can't remember if they are related to Arthur
Fucksake?

I see that somewhere, Its was well funny...

But to the point, why do people post these stupid virus warning?
Were not dumb, We know what they are...

Unfortunately Seb there are people out there who are dumb, or if not dumb,
just plain gullible. For example I've been telling someone for weeks now
that they had a virus on their machine, and they wouldn't believe till they
got their phone bill last week, which was Ł600 for the quarter, and sure
enough their machine had been dialling out a premium based number.

When I checked the machine, it actually had 9 separate viruses on it, and 4
diallers, which were luckily conflicting with one another. Their anti virus
software was 5 years out of date, and they said "Oh I thought AOL stopped
the viruses coming on!"

Now I realise she is an extreme case, but their are a lot of people out
there with no knowledge whatsoever of computers, they even have to take
their machines to a technician to load a new programme on it for them.

Adrian
------------------------------------------------------------------
All emails to my address are blocked, except for those on my contact list.
Therefore to those who I do not already exchange emails with please post
letting me know you wish to send a personal email, and I will add you to my
contact list.

--

Çheetah!

...Alabama: The *other* Texas!

Adrian Miles-Davros · Jul 11, 2005

"Çheetah!" <nobody@knowsnothing.net> wrote in message
news:40743CDF.212D8E54@knowsnothing.net...

Adrian Miles-Davros wrote:

"Seb" <seb.elmy@dsl.pipex.com> wrote in message
news:407339d1$0$6542$cc9e4d1f@news-text.dial.pipex.com...
"Dr Halonfire$" <sharron_field@hotmail.nospam.com> wrote in message
news:c4vcnm$bcf$1@titan.btinternet.com...
Seb wrote:
NO SHIT SHERLOCK

I remember that family; the Noe-Shit Sherlocks. They are related to
Jack
Shit by marriage. I can't remember if they are related to Arthur
Fucksake?

I see that somewhere, Its was well funny...

But to the point, why do people post these stupid virus warning?
Were not dumb, We know what they are...

Unfortunately Seb there are people out there who are dumb, or if not
dumb,
just plain gullible. For example I've been telling someone for weeks
now
that they had a virus on their machine, and they wouldn't believe till
they
got their phone bill last week, which was Ł600 for the quarter, and sure
enough their machine had been dialling out a premium based number.

When I checked the machine, it actually had 9 separate viruses on it,
and 4
diallers, which were luckily conflicting with one another. Their anti
virus
software was 5 years out of date, and they said "Oh I thought AOL
stopped
the viruses coming on!"

Now I realise she is an extreme case, but their are a lot of people out
there with no knowledge whatsoever of computers, they even have to take
their machines to a technician to load a new programme on it for them.

Look you stupid sons-a-bitches, quit crossposting this shit to
alt.crossover!

Go screw yourself you top posting asshole!

Çheetah!

...Alabama: The *other* Texas!

No it's an even bigger shithole!

Grimly Fiendish · Jul 11, 2005

"Çheetah!" <nobody@knowsnothing.net> wrote in message
news:40743CDF.212D8E54@knowsnothing.net...

Look you stupid sons-a-bitches, quit crossposting this shit to
alt.crossover!

And alt.dating.uk.north-west

Terry Pinnell · Jul 11, 2005

Fred Bloggs <nospam@nospam.com> wrote:

Eric wrote:
Can this circuit be made to act on a single switch
Ie push on and then push again is Off.

Yes.

and what will
I need to do this.

You need to add some stuff.

Thanks in advance

Eric

You're welcome.

Missed (and cannot recover) the original post. Was there an attachment
with it? Here in sed? And what's that group 'alt.electronics'?

--
Terry Pinnell
Hobbyist, West Sussex, UK

Fred Bloggs · Jul 11, 2005

Terry Pinnell wrote:

Fred Bloggs <nospam@nospam.com> wrote:

Eric wrote:

Can this circuit be made to act on a single switch Ie push on and
then push again is Off.

Yes.

and what will I need to do this.

You need to add some stuff.

Thanks in advance

Eric

You're welcome.

Missed (and cannot recover) the original post. Was there an
attachment with it?

No- the entire post is quoted above. The thread consisted of
the first weak question -followed by two deservingly superficial responses,
and that was the end of it.

Here in sed? And what's that group 'alt.electronics'?

I have no idea- S.E.D. is the "least bad" of electronics discussion
groups and it only goes down hill from there- more like off a cliff.

Terry Pinnell · Jul 11, 2005

Fred Bloggs <nospam@nospam.com> wrote:

Eric wrote:
Can this circuit be made to act on a single switch
Ie push on and then push again is Off.

Yes.

and what will
I need to do this.

You need to add some stuff.

Thanks in advance

Eric

You're welcome.

To OP: Your attachment apparently did not appear here. Assuming that
a) you're still interested, and
b) you haven't already found scores of answers from a quick google.
please repost it in alt.binaries.schematics.electronic, or give a web
link.

--
Terry Pinnell
Hobbyist, West Sussex, UK

Eric · Jul 11, 2005

Thanks to all for your help.
I found that a 74ls74 jk flip flop dose the job for My needs.
I just tied the inputs and the reset high and use a debounced push button
dost the trick.
Terry Pinnell <terrypin@dial.pipex.com> wrote in
news:5n82809tn299bilpn7h5oma4lo5qss0vim@4ax.com:

Fred Bloggs <nospam@nospam.com> wrote:

Eric wrote:
Can this circuit be made to act on a single switch
Ie push on and then push again is Off.

Yes.

and what will
I need to do this.

You need to add some stuff.

Thanks in advance

Eric

You're welcome.

To OP: Your attachment apparently did not appear here. Assuming that
a) you're still interested, and
b) you haven't already found scores of answers from a quick google.
please repost it in alt.binaries.schematics.electronic, or give a web
link.

Jim Thompson · Jul 11, 2005

On Mon, 19 Apr 2004 17:15:35 GMT, Eric <gunnerforyou@yahoo.com> wrote:

Thanks to all for your help.
I found that a 74ls74 jk flip flop dose the job for My needs.
I just tied the inputs and the reset high and use a debounced push button
dost the trick.
[snip]

480)460-2350 | |
| E-mail Address at Website Fax

Robert Baer · Jul 11, 2005

SysAdmin@ed.shawcable.net wrote:

Protect yourself from new viruses that you may not know you have. We have designed a set of anti virus tools to keep your system secure. Visit here for more information on these free and easy to use tools

http://www.gigdot.net/

Does not exist.

Eric · Jul 11, 2005

Jim Thompson <thegreatone@example.com> wrote in
news:lv2880pcm76d0uvc52ihrlc58rt17bdu6q@4ax.com:

On Mon, 19 Apr 2004 17:15:35 GMT, Eric <gunnerforyou@yahoo.com> wrote:

Thanks to all for your help.
I found that a 74ls74 jk flip flop dose the job for My needs.
I just tied the inputs and the reset high and use a debounced push
button dost the trick.
[snip]

Eh? Last I knew a 74xx74 is a dual D-type flipflop ;-)

...Jim Thompson

opps my bag I ment a 74xx73

Terry Pinnell · Jul 11, 2005

Eric <gunnerforyou@yahoo.com> wrote:

Jim Thompson <thegreatone@example.com> wrote in
news:lv2880pcm76d0uvc52ihrlc58rt17bdu6q@4ax.com:

On Mon, 19 Apr 2004 17:15:35 GMT, Eric <gunnerforyou@yahoo.com> wrote:

Thanks to all for your help.
I found that a 74ls74 jk flip flop dose the job for My needs.
I just tied the inputs and the reset high and use a debounced push
button dost the trick.
[snip]

Eh? Last I knew a 74xx74 is a dual D-type flipflop ;-)

...Jim Thompson

opps my bag I ment a 74xx73

Which was presumably intended as:
Oops, my bad. I meant a 74xx73.

Precision, eh? Do any of your finished circuits work?

--
Terry Pinnell
Hobbyist, West Sussex, UK

Reg Edwards · Jul 11, 2005

To prevent thermal runaway -

In place of R5 try a low-power npn transistor like a BC109 with collector
coupled back to its own base via a slider on a 1K-ohm preset potentiometer.
Thermally couple this transistor to the output transistors if possible.

1.4 volts between collector and emitter. 0.6 volts between base and emitter
as set by the 1K preset pot.
----
Reg

Joseph Hansen · Jul 11, 2005

Looks from here like the circuit is already pretty well designed.

Thermal runaway is avoided by adding appropriate heat sinks. Simple.
The resistor values are a calculation that I'm sure your teacher wants YOU
to do, and you haven't provided enough information in your post for us to do
it for you anyway.
We'd need to know stuff like what the gain of each stage should be (we
already know the gain of the last stage is 1...), whether the first two
stages use matched pairs in a single package or discreet components, etc...

Really, if your teacher didn't think you had the necessary tools (math) to
do this, he wouldn't have assigned it.

"pil" <pil@webmail.co.za> wrote in message
news:mb6dnYoyrZy4DzPdRVn-sA@is.co.za...

The voltage rails are +/- 15V and the load is 100ohm.

Max output voltage swing must be 2/3 of Vcc

R5 must be used to set the quiescent current in the output stage to 1mA.

R2 must be a pot the next size up from the calculated value. It must be
used
to set the zero offset of the output with both inputs grounded

I also need suggestions on how to prevent thermal runaway. The circuit
that
I built keeps heating up.

Any help on designing this circuit is appreaciated

Johan

Rich Grise · Jul 11, 2005

"Joseph Hansen" <sumgie@comcast.net> wrote in message news:L3Lrc.5321

We'd need to know stuff like what the gain of each stage should be (we
already know the gain of the last stage is 1...), whether the first two
stages use matched pairs in a single package or discreet components,
etc...

^^^^^^^^

Actually, their components have a reputation for being terrible
busybodies....

Cheers!
Rich

Op amps problem Gain Calculation

Carmen

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Seb

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Seb

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Dr Halonfire$

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Adrian Miles-Davros

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Dr Halonfire$

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Çheetah!

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Adrian Miles-Davros

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Grimly Fiendish

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Terry Pinnell

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Fred Bloggs

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Terry Pinnell

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Eric

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Eric

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