On 5/19/09, Kai-Martin Knaak wrote:
> Note, there is no "fair use" clause in non Anglo American copyright law.
[snip]
> Another difference between Anglo American law and the rest of the world:
> Under European law an author can't give away the copyright on his work.
You should be slightly overgen
On Wednesday 20 May 2009, DJ Delorie wrote:
>> It is _your_ AC, right?
>
>Well yeah, but I don't want to fiddle with it *that* much. Besides, I
>don't know that they don't already do what you've suggested. IIRC the
>fan and compressor turn on separately, they might turn off separately
>too. I've
> It is _your_ AC, right?
Well yeah, but I don't want to fiddle with it *that* much. Besides, I
don't know that they don't already do what you've suggested. IIRC the
fan and compressor turn on separately, they might turn off separately
too. I've never paid that much attention to them.
__
On Wednesday 20 May 2009, DJ Delorie wrote:
>> Then put a time delay to off of at least 3 to 5 minutes into the
>> condensor fan circuit only,
>
>I don't have that kind of control over it. I have one low-voltage
>control loop to tell it on/off, and that's it.
It is _your_ AC, right? You have eve
On Wednesday 20 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Wednesday 20 May 2009, Joerg wrote:
>>> Gene Heskett wrote:
On Wednesday 20 May 2009, Joerg wrote:
> DJ Delorie wrote:
>> Levente Kovacs writes:
>>> 230V times 100A is something I dont want to even calculate.
>>
On May 20, 2009, at 7:07 PM, Peter Gregson wrote:
>
>I am having considerable difficulty installing geda-bundle on my
>MacBook running Mac OS X 10.5.7. I tried fink; it appeared to work
>after much messing about caused by my version of fink not
> updating the
>table when it say
I am having considerable difficulty installing geda-bundle on my
MacBook running Mac OS X 10.5.7. I tried fink; it appeared to work
after much messing about caused by my version of fink not updating the
table when it says that it has. I have tried using Fink and
FinkCommander, wi
On May 20, 2009, at 6:05 PM, Joerg wrote:
> John Doty wrote:
>> On May 20, 2009, at 2:36 PM, der Mouse wrote:
>>
> A ton of cooling is 12 Kbtu, about the heat of crystallization of
> one ton of water, per hour.
>> Why do engineers use so many whacky units?
> [...], tradition and c
Saritha -
On Wed, May 20, 2009 at 01:47:03PM -0700, Saritha Kalyanam wrote:
>3) escape routing for BGA?
Here's a start:
http://recycle.lbl.gov/~ldoolitt/ft256/
(or finish, for that particular device)
Generalized, it represents normal industry practice.
- Larry
__
> Then put a time delay to off of at least 3 to 5 minutes into the
> condensor fan circuit only,
I don't have that kind of control over it. I have one low-voltage
control loop to tell it on/off, and that's it.
> By the same token, if the evaporator fan in the furnace is being
> stopped at the s
John Doty wrote:
> On May 20, 2009, at 2:36 PM, der Mouse wrote:
>
A ton of cooling is 12 Kbtu, about the heat of crystallization of
one ton of water, per hour.
> Why do engineers use so many whacky units?
[...], tradition and convenience.
>>> Good excuses for the masses. Not s
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> Gene Heskett wrote:
>>> On Wednesday 20 May 2009, Joerg wrote:
DJ Delorie wrote:
> Levente Kovacs writes:
>> 230V times 100A is something I dont want to even calculate.
> It's 23000 :-)
>
> My air conditioner
On Wednesday 20 May 2009, der Mouse wrote:
>>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>>> one ton of water, per hour.
>>>
Why do engineers use so many whacky units?
>>>
>>> [...], tradition and convenience.
>>
>> Good excuses for the masses. Not so good for engineer
On Wednesday 20 May 2009, Levente Kovacs wrote:
>We want to avoid transformers. The older version of this equippment had the
>good old Quad-405 power amplifiers, and transformers at the end. It is so
>heave, that one man can hardly lift the unit.
>
>Btw... the same unit must also provide a voltage
On Wednesday 20 May 2009, DJ Delorie wrote:
>> Not even a 40 horse compressor in a 22 ton (rated, yeah sure) Lennox
>> will draw that much for that long.
>
>Gee, you guys are making me feel bad. Now I have to go out and
>research air conditioners :-P
>
>Anyway, I know I have a 60 amp circuit for i
DJ Delorie wrote:
>> But if your computer and network gear uses anywhere close to half of
>> your grand total I think that stuff needs some "greenification"
>> attention. Even if it was 1/4 that's huge.
>
> Agreed, but keep in mind I work from home, so this is all high power
> equipment that get
> But if your computer and network gear uses anywhere close to half of
> your grand total I think that stuff needs some "greenification"
> attention. Even if it was 1/4 that's huge.
Agreed, but keep in mind I work from home, so this is all high power
equipment that gets used all day. Not a lot
On Wednesday 20 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Wednesday 20 May 2009, Joerg wrote:
>>> DJ Delorie wrote:
Levente Kovacs writes:
> 230V times 100A is something I dont want to even calculate.
It's 23000 :-)
My air conditioner draws 123 amps at 240 volt
On Wednesday 20 May 2009, David C. Kerber wrote:
>Are Kill-a-watt meters any good? I just got one for my company to check
> loading on UPSs and racks of equipment. Seems ok when I plugged it in and
> compared its reading to the 5-light load indicator on the UPS.
>
>> -Original Message-
>>
On May 20, 2009, at 2:36 PM, der Mouse wrote:
>>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>>> one ton of water, per hour.
Why do engineers use so many whacky units?
>>> [...], tradition and convenience.
>> Good excuses for the masses. Not so good for engineering, w
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> DJ Delorie wrote:
>>> Levente Kovacs writes:
230V times 100A is something I dont want to even calculate.
>>> It's 23000 :-)
>>>
>>> My air conditioner draws 123 amps at 240 volts for the first few
>>> seconds. That's almost 30kW
DJ Delorie wrote:
> DJ Delorie writes:
>> I think it's a 60 ton.
>
> Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
>
Ok, that sounds more reasonable. I thought you guys lived in a structure
similar to Hearst Castle.
But if your computer and network gear uses anywhere
Levente Kovacs wrote:
> On Wed, 20 May 2009 09:26:07 -0700
> Joerg
> wrote:
>
>> I'd wear eye protection :-)
>>
>> I can already picture it, on day a connection comes loose, we all
>> hear a muffled *BOOM* and see an orange glow over Budapest ...
>
> Well... I will do it in Budakalász. :-) But y
Are Kill-a-watt meters any good? I just got one for my company to check
loading on UPSs and racks of equipment. Seems ok when I plugged it in and
compared its reading to the 5-light load indicator on the UPS.
> -Original Message-
> From: geda-user-boun...@moria.seul.org
> [mailto:ge
Hi Levente,
On Wed, 2009-05-20 at 22:02 +0200, Levente Kovacs wrote:
>
> We want to avoid transformers. The older version of this equippment had the
> good old Quad-405 power amplifiers, and transformers at the end. It is so
> heave, that one man can hardly lift the unit.
>
> Btw... the same uni
> You might as well ask why motor power is measured in horsepower -
> that's another historical unit that's cryptic and baffling to the
> uninitiated, but is perfectly good to those in the industry.
Bad example, though - motor horsepower is not a regulated measurement
like amps is, so marketing f
Just as there are design patterns to solve common software engineering
problems:
[1]http://en.wikipedia.org/wiki/Design_patterns
Does it make sense to come up with design patterns for common layout
problems?
For example,
1) how does one commonly layout data/address lines betwe
>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>> one ton of water, per hour.
>>> Why do engineers use so many whacky units?
>> [...], tradition and convenience.
> Good excuses for the masses. Not so good for engineering, which
> depends on precise communication.
Which measu
> Is this data obtained from a Kill-a-watt?
No, from the prototype powermeter board.
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On Wednesday 20 May 2009, DJ Delorie wrote:
>> Seconds and not fractions or a second? Yikes! Unless it's a 10-15
>> ton unit that doesn't sound normal.
>
>I think it's a 60 ton. It draws 30 amps once it's running. Yeah,
>seconds, not fractions. They had to upgrade the transformer on the
>pole to
We want to avoid transformers. The older version of this equippment had the
good old Quad-405 power amplifiers, and transformers at the end. It is so
heave, that one man can hardly lift the unit.
Btw... the same unit must also provide a voltage output up to 300V, but only
100Watts. For that, we'
On May 20, 2009, at 1:31 PM, der Mouse wrote:
> ~5 tons, enough for a 3000 sq ft house.
And neither makes dimensional sense ;-)
>>> 1 ton refers to the equivalent cooling power as melting 1 ton of
>>> ice -
>> Still not dimensionally right. Need time in the denominator.
>
> Yes - "per
~5 tons, enough for a 3000 sq ft house.
>>> And neither makes dimensional sense ;-)
>> 1 ton refers to the equivalent cooling power as melting 1 ton of ice -
> Still not dimensionally right. Need time in the denominator.
Yes - "per hour". A ton of cooling is 12 Kbtu, about the heat of
cryst
> Not even a 40 horse compressor in a 22 ton (rated, yeah sure) Lennox
> will draw that much for that long.
Gee, you guys are making me feel bad. Now I have to go out and
research air conditioners :-P
Anyway, I know I have a 60 amp circuit for it, and it hits 123 amps
long enough for my DVM to
On May 20, 2009, at 1:10 PM, Ethan Swint wrote:
>
> I think it's a 60 ton.
Or it's a 60 kbtu, I don't recall - it's got "60" in the model
number
>>> 60 tons would be almost enough for a big-box store! 60kbtu sounds
>>> more
>>> like it, ~5 tons, enough for a 3000 sq ft house.
>>>
>
I think it's a 60 ton.
>>> Or it's a 60 kbtu, I don't recall - it's got "60" in the model
>>> number
>> 60 tons would be almost enough for a big-box store! 60kbtu sounds
>> more
>> like it, ~5 tons, enough for a 3000 sq ft house.
>>
>
> And neither makes dimensional sense ;-)
>
1
On Wednesday 20 May 2009, Joerg wrote:
>DJ Delorie wrote:
>> Levente Kovacs writes:
>>> 230V times 100A is something I dont want to even calculate.
>>
>> It's 23000 :-)
>>
>> My air conditioner draws 123 amps at 240 volts for the first few
>> seconds. That's almost 30kW.
>
>Seconds and not fracti
True... But I think they use tons once you reach about 1 ton of
cooling. (12000BTU/Hr)
Mark
> Most window air-conditioners I see in stores are rated in BTU's.
>
> D
>
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> -Original Message-
> From: geda-user-boun...@moria.seul.org
> [mailto:geda-user-boun...@moria.seul.org] On Behalf Of Mark
> Cianfaglione
> Sent: Wednesday, May 20, 2009 2:12 PM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: [OFF] high current amplifier
>
> DJ
>
> Knowing th
DJ
Knowing that you live in the North-East I'd say it's a 6.0 ton unit. A
60 Kbtu unit (btus are normally only for heating) would be too small
and a 60 ton would imply that you are running Antartic winter
simulations in your house in the summer... ;-)
Mark
geda-user-boun...@mo
On May 20, 2009, at 12:04 PM, Ethan Swint wrote:
>
> DJ Delorie wrote:
>> DJ Delorie writes:
>>
>>> I think it's a 60 ton.
>>>
>>
>> Or it's a 60 kbtu, I don't recall - it's got "60" in the model
>> number.
>>
> 60 tons would be almost enough for a big-box store! 60kbtu sounds
> more
> like
On Wed, 20 May 2009 09:26:07 -0700
Joerg
wrote:
> I'd wear eye protection :-)
>
> I can already picture it, on day a connection comes loose, we all
> hear a muffled *BOOM* and see an orange glow over Budapest ...
Well... I will do it in Budakalász. :-) But yes, I know it is a crazy toy! :-)
--
> 60 tons would be almost enough for a big-box store! 60kbtu sounds
> more like it, ~5 tons, enough for a 3000 sq ft house.
It's 4000 sq ft.
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DJ Delorie wrote:
> DJ Delorie writes:
>
>> I think it's a 60 ton.
>>
>
> Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
>
60 tons would be almost enough for a big-box store! 60kbtu sounds more
like it, ~5 tons, enough for a 3000 sq ft house.
-Ethan
___
DJ Delorie writes:
> I think it's a 60 ton.
Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
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> Seconds and not fractions or a second? Yikes! Unless it's a 10-15
> ton unit that doesn't sound normal.
I think it's a 60 ton. It draws 30 amps once it's running. Yeah,
seconds, not fractions. They had to upgrade the transformer on the
pole to supply enough juice.
> Did you find some of the
DJ Delorie wrote:
> Levente Kovacs writes:
>> 230V times 100A is something I dont want to even calculate.
>
> It's 23000 :-)
>
> My air conditioner draws 123 amps at 240 volts for the first few
> seconds. That's almost 30kW.
>
Seconds and not fractions or a second? Yikes! Unless it's a 10-15
I have 1.4.1.20080929, that's the only version I've tried to build.
- Miles
On Wed, May 20, 2009 at 7:26 AM, Alberto Maccioni
wrote:
> Has anyone been able to compile gEDA v1.4.3 with cygwin?
> I can only build 1.4.2, but not 1.4.1
> What about v1.5.x? It needs GTK 2.8 but unfortynately cygwin o
On May 20, 2009, at 12:27 PM, Mark Rages wrote:
> You need a high-current, low-voltage transformer:
>
> http://www.cooperhandtools.com/brands/CF_Files/model_detail.cfm?
> upc=037103079480
ROFL!!
--
Dave McGuire
Port Charlotte, FL
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John Doty wrote:
> On May 20, 2009, at 9:43 AM, Levente Kovacs wrote:
>
>> we want to test a current sensor with mains' frequency. However
>> there are
>> transient once in a while on the line, so we must simulate them too.
>
> Why not just use the mains, then? Step down volts to get current,
On May 20, 2009, at 9:43 AM, Levente Kovacs wrote:
> we want to test a current sensor with mains' frequency. However
> there are
> transient once in a while on the line, so we must simulate them too.
Why not just use the mains, then? Step down volts to get current,
make your transients by sw
On Wed, 2009-05-20 at 11:27 -0500, Mark Rages wrote:
> On Wed, May 20, 2009 at 11:16 AM, Levente Kovacs
> wrote:
> > On Wed, 20 May 2009 10:48:53 -0500
> > Mark Rages wrote:
> >
> >> What kind of transient are you trying to simulate? Maybe it would be
> >> easier to make a circuit to add the tr
On Wed, May 20, 2009 at 11:16 AM, Levente Kovacs wrote:
> On Wed, 20 May 2009 10:48:53 -0500
> Mark Rages wrote:
>
>> What kind of transient are you trying to simulate? Maybe it would be
>> easier to make a circuit to add the transient to mains power, instead
>> of recreating mains power with an
Levente Kovacs writes:
> 230V times 100A is something I dont want to even calculate.
It's 23000 :-)
My air conditioner draws 123 amps at 240 volts for the first few
seconds. That's almost 30kW.
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ht
Levente Kovacs wrote:
> On Wed, 20 May 2009 11:45:55 -0400 (EDT)
> der Mouse
> wrote:
>
>> What _is_ this driving? Ten feet of #3 copper?
>
> A current sensor.
>
I'd wear eye protection :-)
I can already picture it, on day a connection comes loose, we all hear a
muffled *BOOM* and see an or
On Wednesday 20 May 2009, Steve Underwood wrote:
>Levente wrote:
>> Hi,
>>
>>
>> I have to design an audio amplifier that can deliver 100Amps. It should
>> work around 50Hz, and the maximum output power shall be 500W. I am
>> currently reading articles about this topic, but it is very hard to find
On Wed, 20 May 2009 10:48:53 -0500
Mark Rages wrote:
> What kind of transient are you trying to simulate? Maybe it would be
> easier to make a circuit to add the transient to mains power, instead
> of recreating mains power with an amplifier.
230V times 100A is something I dont want to even cal
On Wed, 20 May 2009 11:45:55 -0400 (EDT)
der Mouse
wrote:
> What _is_ this driving? Ten feet of #3 copper?
A current sensor.
--
Levente Kovacs
http://logonex.eu
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Levente Kovacs wrote:
> Ok,
>
>
> I guess I wasn't clear, so I have to add that it won't be used to drive a
> speaker, I used the word "audio" to refer the frequency range. 500W audio
> amplifier that designed to drive 4-8 Ohms is easy. But 100A, is something you
> won't get in a pro audio store.
> I guess I wasn't clear, so I have to add that it won't be used to
> drive a speaker, I used the word "audio" to refer the frequency
> range. 500W audio amplifier that designed to drive 4-8 Ohms is easy.
> But 100A, is something you won't get in a pro audio store.
100A 500W...5V...that's .05 ohm
On Wed, May 20, 2009 at 10:43 AM, Levente Kovacs
<[1]leventel...@gmail.com> wrote:
On Wed, 20 May 2009 10:33:30 -0500
Mark Rages <[2]markra...@gmail.com> wrote:
> 100 amps and 500 watts implies a load impedance of 0.05 ohms. Some
> professional audio amplifiers may handle this,
On Wed, 20 May 2009 10:33:30 -0500
Mark Rages wrote:
> 100 amps and 500 watts implies a load impedance of 0.05 ohms. Some
> professional audio amplifiers may handle this, but I think most will
> go into self-protect mode.
>
> Best bet might be a car amp:
> http://www.sonicelectronix.com/item_11
Ok,
I guess I wasn't clear, so I have to add that it won't be used to drive a
speaker, I used the word "audio" to refer the frequency range. 500W audio
amplifier that designed to drive 4-8 Ohms is easy. But 100A, is something you
won't get in a pro audio store. The coldamp design provides 25Amps.
On Wed, May 20, 2009 at 10:14 AM, Steve Underwood
<[1]ste...@coppice.org> wrote:
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It
should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently readin
On May 20, 2009, at 11:17 AM, John Griessen wrote:
>>I believe this is commonly referred to as a "Class D" amplifier.
>> It is basically a switching regulator with a loop response time that
>> is fast enough to handle audio frequencies.
>
> Sure. and he says to operate "around 50 Hz", which I
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently reading articles about this topic, but it is very hard to find
> things like this. If someone has some experience wi
Dave McGuire wrote:
>I believe this is commonly referred to as a "Class D" amplifier.
> It is basically a switching regulator with a loop response time that
> is fast enough to handle audio frequencies.
Sure. and he says to operate "around 50 Hz", which I take as 35 to 65 Hz...fog
hor
On May 20, 2009, at 10:33 AM, der Mouse wrote:
>>> I have to design an audio amplifier that can deliver 100Amps.
>>> [...50Hz...500W...]
>> [...sketch...]
>> This is the highest efficiency type of driver since [its] driving
>> transistors are never in active region -- always full on or off.
>> High
>> I have to design an audio amplifier that can deliver 100Amps.
>> [...50Hz...500W...]
> [...sketch...]
> This is the highest efficiency type of driver since [its] driving
> transistors are never in active region -- always full on or off.
> High efficiency is what you need to put out 500W.
It occ
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently reading articles about this topic, but it is very hard to find
> things like this. If someone has some experience
Hi,
I have to design an audio amplifier that can deliver 100Amps. It should
work around 50Hz, and the maximum output power shall be 500W. I am
currently reading articles about this topic, but it is very hard to find
things like this. If someone has some experience with, or some
documentation
Has anyone been able to compile gEDA v1.4.3 with cygwin?
I can only build 1.4.2, but not 1.4.1
What about v1.5.x? It needs GTK 2.8 but unfortynately cygwin only has 2.6
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