Chip with simple program for Toy

[Dmitri(Cabling-Design.com]

ganjatoker@gmail.com wrote:

I'm curious as to how the term "live" came to refer to an
energized
circuit. It is somewhat of a contradiction, as touching a live wire has
the potential of making someone dead! I can however, see how the term
expresses the idea that the circuit has a certain quality of
"life" to
it. I've tried checking etymological sources but the most mentioned is
that the term came about around 1890, which would make sense.

Thanks!

Well, I think it's got something to do with the early experiments with
electricity whereby a DEAD frog’s leg would move as if it was ALIVE when
shocked with electrical current. It would then be early 1800s you'd need
to look at if you want to find out when did the term come about.



--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
-------------------------------------


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Article posted with Cabling-Design.com Newsgroup Archive
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no-spam read and post WWW interface to your favorite newsgroup -
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##-----------------------------------------------##

 

[Jonathan Kirwan]

On Thu, 12 May 2005 16:52:44 +0200, "Jeroen" <none@none.com> wrote:

"Jonathan Kirwan" <jkirwan@easystreet.com> schreef in bericht
news:d496819713cigfdihkvdvcptqq17frd24t@4ax.com...
On Wed, 11 May 2005 23:25:46 -0500, "Ratch" <Watchit@comcast.net
wrote:

From Digital Design by M. Morris Mano

"A combinational circuit consists of logic gates whose outputs at
any
time are determined directly from the present combination of inputs
without
regard to previous inputs. A combinational circuit performs a specific
information processing operation fully specified logically by a set of
Boolean functions. Sequential circuits employ memory elements in
addition
to logic gates. Their outputs are a function of the inputs and the state
of
the memory elements. The state of the memory elements, in turn, is a
function of previous inputs. As a consequence, the outputs of a
sequential
circuit depend not only on present inputs, but also on past inputs, and
the
circuit behavior must be specified by a time sequence of inputs and
internal
states."

When I saw the OP's glee at getting an answer for a test from here
(without trying to really understand it) I decided against saying
anything more just then. It appears the test may be over now, so:

To put it simply without distorting too much, combinatorial logic
doesn't have state and sequential logic does.


What about a 2 gate S/R flipflop? Or does logic with feedback not qualify as
combinatorial?

If you read Ratch's quote, you will have your answer. If it amounts
to retained state, the knowledge of which is required (as well as the
state of the inputs) in order to understand the outputs, then it is
not combinatorial.

Jon

 

[Eric R Snow]

On Sat, 07 May 2005 11:18:55 -0700, Jamie
<jamie_5_not_valid_after_5_Please@charter.net> wrote:

Dr Engelbert Buxbaum wrote:

Rick wrote:


Hi Group,

I am wiring a room in my basement. It is a new room. I have purchased 2
books on home wiring and I am confident about doing the work myself.


Frankly, I am not so sure. At least, have your work checked by somebody
qualified. In most jurisdictions, you are actually required to do that
by law.


I
have 4 plug outlets, one light switch, two light ceiling outlets. I am
'daisy chaining' these together to go on the same circuit. As such, I
am pig tailing the wires to connect to the actual outlet devices. My
question is about the grounding. To save a few dollars, I purchased
these metal cases for the outlets that seem to be all I would need.
Except, when I look at the existing ones that were put in when the
house was built, they are a bit different, namely, there are two screws
in the case for the ground wires.


Normally, you have 3 wires in house installation: live (usually brown),
neutral (usually blue) and protective earth (PE, usually green/yellow
bicolour). Some heavy duty equipment may have 3 different live wires
(brown, grey and black) carrying the voltage with different phase,
giving a total of 5 wires. This includes kitchen ovens, air
conditioning, flow through water heaters and the like.

Only in very old installations are neutral and PE connected at the
outlet ("nulling"), this type of wiring has been forbidden for a long
time, because it prevents the use of residual current devices (RCDs).

By the way, have you included a RCD in your fuse box? If not, reconsider
because these thingies are real life savers if things go wrong. 30 mA is
the prefered size for house installation.

when wiring lighting and plugs, the 2 two are not to be on the same
circuit. they need their own breakers.
color codes normally are Black for HOT, white for Neutral and Green
for earth Ground. the neutral and earth ground are to be connected in
the breaker box on the ground bus bar, then an earth ground electrode
and possibly a water pipe that is near by that has been conductive
tested connected to the ground bus bar using no smaller than 10 #awg bar
copper
wire.
this is the NEC codes the last time i looked.
P.S.
Remote fault breakers (GFI's) are also required in some localities.

just thought i was spit in my 2 cents worth.


It's obvious that the two responders are from different countries. So

color are different. That said, the original poster's question about
running pigtails to the receptacles is right on. Running a pigtail
with a ground is the way to go. If the box is metal ground it too.
Don't rely on the box to ground the receptacle. Even if this is OK in
some municipalities it is bad practice. Especially since you don't
know what the next homeowner is going to do. Some people use the push
in type of receptacle to bring the power in and use the screws to
bring the power out to the next receptacle. Bad idea. Instead, use the
screws provided for both power in and out. But a pigtail is still
better. You can buy a high quality screwdriver in either phillips or
flat. These screw drivers have a pin sticking out of the handle
parallel to the screwdriver shaft. This short pin is for sticking the
end of the wire in and making a U shape to fit the receptacle screw.
These are high quality tools, low in price, and make the job go way
faster. My father-in-law, who is a commercial electrician, helped me
wire my machine shop from scratch. He worked hard but I worked a lot
harder and learned tons. The guy from Puget Sound Energy, our power
supplier, said it was one of the best wiring jobs he'd ever seen.
Doing your job right will only add a small amount of time and expense
and pay off with no trouble later on. A good example is your pig tail
wiring of the receptacles. If one goes bad only a short wire needs to
be removed and maybe replaced. Wirenuts are real easy to use and
replacing the pigtail with the receptacle is no big deal. If the pig
tail is OK then only one wire set needs to be messed with: the
pigtail. You will not have to worry about any other wires in the box.
Cheers.,
Eric

 

[Eric R Snow]

On 12 May 2005 04:08:08 -0700, ganjatoker@gmail.com wrote:

I'm curious as to how the term "live" came to refer to an energized
circuit. It is somewhat of a contradiction, as touching a live wire has
the potential of making someone dead! I can however, see how the term
expresses the idea that the circuit has a certain quality of "life" to
it. I've tried checking etymological sources but the most mentioned is
that the term came about around 1890, which would make sense.

Thanks!
Maybe because when you grab the Live wire you may flail around in a

lively manner. I imagine Hot comes from how hot something (like your
body) gets when connected to the Hot wire. I have heard electricians
say they were were all "Het up" when they touched the wrong wire.
ERS

 

[Michael Black]

Eric R Snow (etpm@whidbey.com) writes:

On 12 May 2005 04:08:08 -0700, ganjatoker@gmail.com wrote:

I'm curious as to how the term "live" came to refer to an energized
circuit. It is somewhat of a contradiction, as touching a live wire has
the potential of making someone dead! I can however, see how the term
expresses the idea that the circuit has a certain quality of "life" to
it. I've tried checking etymological sources but the most mentioned is
that the term came about around 1890, which would make sense.

Thanks!
Maybe because when you grab the Live wire you may flail around in a
lively manner. I imagine Hot comes from how hot something (like your
body) gets when connected to the Hot wire. I have heard electricians
say they were were all "Het up" when they touched the wrong wire.
ERS

When voltage is going through it, it can do something. It's live.

If there's no voltage, it can't do anything. It's dead.

Michael

 

[Barry Jones]

Jeroen wrote:

"Jonathan Kirwan" <jkirwan@easystreet.com> schreef in bericht
news:d496819713cigfdihkvdvcptqq17frd24t@4ax.com...


On Wed, 11 May 2005 23:25:46 -0500, "Ratch" <Watchit@comcast.net
wrote:

From Digital Design by M. Morris Mano


"A combinational circuit consists of logic gates whose outputs at


any


time are determined directly from the present combination of inputs


without


regard to previous inputs. A combinational circuit performs a specific
information processing operation fully specified logically by a set of
Boolean functions. Sequential circuits employ memory elements in


addition


to logic gates. Their outputs are a function of the inputs and the state


of


the memory elements. The state of the memory elements, in turn, is a
function of previous inputs. As a consequence, the outputs of a


sequential


circuit depend not only on present inputs, but also on past inputs, and


the


circuit behavior must be specified by a time sequence of inputs and


internal


states."


When I saw the OP's glee at getting an answer for a test from here
(without trying to really understand it) I decided against saying
anything more just then. It appears the test may be over now, so:

To put it simply without distorting too much, combinatorial logic
doesn't have state and sequential logic does.




What about a 2 gate S/R flipflop? Or does logic with feedback not qualify as
combinatorial?

Jeroen

Combinational circuits are not clocked. You put some set of inputs into
it, and the circuit produces results (outputs) just as fast as it can.
Change the inputs, and the outputs follow, with a very small propagation
delay.

Sequential circuits are clocked. You control when the outputs will
change with a clock. You can change the inputs over and over, and it
won't make any difference to the outputs until the next clock pulse. At
that time, whatever the inputs were at that moment get reflected in the
outputs. Flip-flops are used to maintain the state of the outputs
between clock pulses. Flip-flop outputs are generally considered to be
the circuit outputs.

Sequential circuits generally include a combinational component or
section that provides the logic that determines what the outputs should
be after the next clock pulse. The combinational component usually has
external inputs and feedback inputs from the flip-flop outputs.

I hope you work on understanding this rather than copying it. Put in in
your own words.

--
Barry

 

[Lord Garth]

"Michael Black" <et472@FreeNet.Carleton.CA> wrote in message
news:d611tf$gg1$1@theodyn.ncf.ca...

When voltage is going through it, it can do something. It's live.

If there's no voltage, it can't do anything. It's dead.

I always prevent my voltage from going through my circuits...
I find it easier to measure voltage when it is across a circuit.

 

[Lord Garth]

<alexwright321@altavista.com> wrote in message
news:1115930116.965052.141670@g43g2000cwa.googlegroups.com...

Anyone know how-to make a cable that would plug into my telephone jack
and then into my computer soundcard?

I bought one from EBay and when I plug the cable into my phone line and
then into the soundcard my line
goes dead.

One guy mentioned he uses an isolator circuit of some sort to not short
out the line in his device.

This is the one I bought below that doesn't work.


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=14960&item=5774136958&rd=1&ssPageName=WDVW

**********

This one below supposedly works with a soundcard and phoneline.


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5769614109&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

Think about your poor sound card when the phone rings!!! The ring signal
is
typically about 90 volts at 20 Hz. Since you sound card is AC coupled, the
typical 48 volts DC did not get into your computer.

Research an audio patch or a hybrid or a DAA but don't plug your phone line
into the audio port directly!

 

[John - KD5YI]

John Popelish wrote:

hartlyuk@yahoo.com wrote:

How can a two way conversation be transmitted along two wires of my
residential phone line?.
Why don't the signals confuse(collide) each other as they travel
simultaneously in opposite directions along these two pieces of copper
wire from the pole to my phone?.

This is not about fancy elctronics,as the same applied in the 1880s

As far as the copper is concerned, the two signals are just added
together. For a simple phone loop, you hear both your own voice and the
other person's voice in your ear piece. The tricky part cane in when
the lines got long enough that amplifiers were needed. Then the two
signals had to be separated, so that one amplifier boosted the signal
going one way, and another amplifier boosted the signal going the other
way. I think the first fancy electronics invented for this purpose was
the hybrid transformer, that performed this separation.

Perhaps this page will help:
http://www.du.edu/~etuttle/electron/elect61.htm

Hi, John -

I read that page with interest. I was a bit surprised to note that the
author, in the next-to-last paragraph, refers to Horowitz and Hill and that
their hybrid circuit doesn't work. Do you suppose Win is aware of that? I
don't know how to get in touch with him.

Thanks,
John

 

[julius junghans]

thomas wrote:

where in Germany can I order elcetronic things, which are not so
expensive like "conrad" ?

http://www.dse-faq.elektronik-kompendium.de/dse-faq.htm

 

[Rich Grise]

On Fri, 13 May 2005 14:13:28 +0000, John - KD5YI wrote:

John Popelish wrote:
hartlyuk@yahoo.com wrote:

How can a two way conversation be transmitted along two wires of my
residential phone line?.
Why don't the signals confuse(collide) each other as they travel
simultaneously in opposite directions along these two pieces of copper
wire from the pole to my phone?.

This is not about fancy elctronics,as the same applied in the 1880s

As far as the copper is concerned, the two signals are just added
together. For a simple phone loop, you hear both your own voice and the
other person's voice in your ear piece. The tricky part cane in when
the lines got long enough that amplifiers were needed. Then the two
signals had to be separated, so that one amplifier boosted the signal
going one way, and another amplifier boosted the signal going the other
way. I think the first fancy electronics invented for this purpose was
the hybrid transformer, that performed this separation.

Perhaps this page will help:
http://www.du.edu/~etuttle/electron/elect61.htm

Hi, John -

I read that page with interest. I was a bit surprised to note that the
author, in the next-to-last paragraph, refers to Horowitz and Hill and that
their hybrid circuit doesn't work. Do you suppose Win is aware of that? I
don't know how to get in touch with him.

Post to news:sci.electronics.design, with a subject line like, Ping Win
Hill - What's this guy talking about?

Tell him Rich the Newsgroup Wacko sent you. ;-D

Cheers!
Rich

 

[Rich Grise]

On Wed, 11 May 2005 11:30:18 -0500, Paul Jones wrote:

A virus is s/w that can use the malicious feature of
an op sys to replicate or destroy some other s/w .

Linux has no viruses . Only M$ .
It is impossible for Linux to do Virus for it was not written
maliciously .

No, it's possible, but one necessary ingredient is a really stupid
operator that downloads the malware and runs it logged in as root.
So they're not rampant, because there's not much point in writing
anything like that.

Something that _is_ impossible, if the system is installed correctly,
is for malware that's executed by an ordinary user to affect any
files but that user's own.

Hope This Helps!
Rich

 

[Rich Grise]

On Wed, 11 May 2005 11:30:18 -0500, Paul Jones wrote:

A virus is s/w that can use the malicious feature of
an op sys to replicate or destroy some other s/w .

Linux has no viruses . Only M$ .
It is impossible for Linux to do Virus for it was not written
maliciously .

Geez. I crafted a carefully-thought-out response to this before I
realized that you had not even got the joke.

I think I've been trolled! Woe is me!

;-P
Rich

 

[Richard the Dreaded Liber]

On Sat, 07 May 2005 03:19:21 +0000, Don Kelly wrote:

If you wish to do so, I have no desire to infringe upon your freedom.
If you wish to share your smoke with me, you infringe upon my freedom.

I have no problem with this. What I have a problem with is grand sweeping
bans based on nothing more than religious fanatacism.

I say, give bars/restaurants/etc the option. Put up a big sign:

DANGER!
This establishments permits smoking.
If you don't like smoke, smoking, or smokers, then
STAY OUT!!

But that makes way too much sense for the politicos and their groupies
to grasp.

Thanks,
Rich

 

[Rich Grise]

On Wed, 04 May 2005 17:04:04 +0000, Lord Garth wrote:

I have knelt down in the lab, stabbing 13 pins of a 16 pin dip into my
knee. Talk about ouch!!! I had to use my pliers to remove the damn
thing.

I was at my bench trying to superglue a Molex connector to a piece of
perfboard, trying to apply pressure, and of course, it slipped and landed
on the floor just as my engineer was walking by. He reflexively bent over,
picked up the connector, and when he went to toss it on my bench, found
it superglued to his finger.

Cheers!
Rich

 

[Matt Flyer]

jason wrote:

Hi Tom and Matt

Thanks a lot. I am looking around books such as The art of electronics
and also some microelectronics book. I understand some of the
explanation given in book but there are times I cannot understand which
node I should short , or open circuit in order to get the correct
voltage node or resistance?
I am still reading and try to understand.
I post here to see if anyone know the concept well and can share the
way how they catch the concept.
Thank you all

rgds and thanks
Jason

Jason,

I was just thinking about your question again. It occured to me
generally one tries to design a transistor circuit so that the operation
is not dependant on the properties of the transistor, but rather on the
circuitry connected to it. For example, consider a simple small signal
BJT. If I remember correcltly an example of such a transistor would be
a 2n3904. To use this transistor in the small signal 'mode' it is first
necessary to bias the transistor into the linear region by providing
sufficient DC drive to activate the device. Once the device is properly
biased, you could connect external resistors to the emitter and
collector to provide a small signal gain. Since aproximately the same
current would flow through the collector as the emitter the ratio of the
two resistances (Rc / Re) determines the small signal gain (as long as
one doesn't over drive into saturation). A similar model holds true for
FETs.

The point I am trying to make is, that it is likely not wise to model a
circuit after the performance or parameters of a particular transistor
as these paramaters vary alot from one device to another. Consequently,
it is better to step back and design the circui so that it is relatively
impervious to these paramaters and you can then develop a small signal
model from that circuit.

 

[Matt Flyer]

Bob Monsen wrote:

Paul Jones wrote:

Do you want to learn C or MCU's ?

C is the worst HLL to program MCU's .
It is a special version that creates tiny code , nothing like the
big versions
There is nothing easier than FORTH and it has ALWAYS generated
tiny code .
There are many ppl trying to say FORTH is slow or bad or ....

FORTH is the fastest to write code , the fastest run time code .


Well, I've written several FORTH implementations, and done large systems
in FORTH. It's a butt-ugly language. Unless you are quite careful, it's
nearly impossible to decipher a few minutes after you've written it. As
a consequence, it's often called a write-only language.

Some of the nice things about FORTH are that multithreading is trivial,
since it often has a built-in scheduler; the interpretive nature makes
it great for hardware hacks, probing registers, and the like; it can be
made very fast and small because of the way the 'interpreter' (ie, NEXT)
works.

I've never seen a good debugger for FORTH, though. They may exist, but
the ones I've seen are always clumsy and annoying to use.

There is at least one FORTH for the PIC; there may be more. There is
also a free C compiler (the hitech C compiler) that you can download.
Using either that or just MPASM will be far easier and more intuitive
than using FORTH, unless you have a masochistic/obsessive streak.

---
Regards,
Bob Monsen
It would seem to me that if one is trying to write code for a PIC that

it would be a fairly simple application that wouldn't be using an
operating systems or multithreaded applications.

A lot of people like to program the PIC in assembly which would
certainly get you into the nuts and bolts of the processor. If you wish
to use a higher level language, C would probably be the best bet, IMHO.

 

[R. Steve Walz]

Lord Garth wrote:

"R. Steve Walz" <rstevew@armory.com> wrote in message
news:4282D1FB.4C76@armory.com...
alismans wrote:

I am trying to use the programmer from

http://members.aon.at/electronics/pic/picpgm/index.html

I have built the circuit
picpgm_cable according to the diagram. I have used a
74LS04 instead of 74ALS05
-----------------------
They are totally different parts, it won't work without the '05.
The '05 is open-collector, totally different.


because this is what was
available. I then run the software WinPicPgm and on
the status line at the bottom there is a message
"No pic programmer found".
Can you help me?
thanks!!



Wow! That one is way old Steve....are you just getting it?
--------------------

Nope, just finding the time to catch up is all, been too busy.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

 

[R. Steve Walz]

Lord Garth wrote:

"R. Steve Walz" <rstevew@armory.com> wrote in message
news:4282D1FB.4C76@armory.com...
alismans wrote:

I am trying to use the programmer from

http://members.aon.at/electronics/pic/picpgm/index.html

I have built the circuit
picpgm_cable according to the diagram. I have used a
74LS04 instead of 74ALS05
-----------------------
They are totally different parts, it won't work without the '05.
The '05 is open-collector, totally different.


because this is what was
available. I then run the software WinPicPgm and on
the status line at the bottom there is a message
"No pic programmer found".
Can you help me?
thanks!!



Wow! That one is way old Steve....are you just getting it?
---------------

I note ALSO that nobody gave the right answer, are you guys slipping?

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

 

[Byron A Jeff]

In article <428558C7.1C79@armory.com>,
R. Steve Walz <rstevew@armory.com> wrote:

Lord Garth wrote:

"R. Steve Walz" <rstevew@armory.com> wrote in message
news:4282D1FB.4C76@armory.com...

Mucho snippage...

I am trying to use the programmer from
http://members.aon.at/electronics/pic/picpgm/index.html

I have used a 74LS04 instead of 74ALS05
-----------------------
They are totally different parts, it won't work without the '05.
The '05 is open-collector, totally different.
I note ALSO that nobody gave the right answer, are you guys slipping?

Steve,

I took Mike's answer as the correct one. To quote

"My apple pie recipe calls for apples. But I used tomatoes because
that was what was available. How come my apple pie doesn't taste right???

The first step in making any circuit work is to use the correct part.
If you can't us the correct part, at least use a COMATIBLE (sic) one.
The '04 is trashing your return data path."

That's why I didn't bother to answer.

BAJ