Chip with simple program for Toy

[John Larkin]

On Mon, 20 Dec 2004 11:31:54 -0600, John Fields
<jfields@austininstruments.com> wrote:

I could be wrong, of course, but you seem to be an idiot. If a switch
is turned on at one end of a wire, then a lamp on the other end will
start to turn on as soon as the switch is turned on.

No. The power to the lamp travels somewhat slower, in the wire, than
c. Nothing, including information, can travel faster than c.

John

 

[Steve Evans]

On 20 Dec 2004 14:01:05 GMT, Saint <> wrote:

He said He would RETURN - JESUS CHRIST

Relax. it was just an idle threat. and if he did, someone would shoot
him pdq.
--

Fat, sugar, salt, beer: the four essentials for a healthy diet.

 

[Roger Johansson]

"Franz Heymann" <notfranz.heymann@btopenworld.com> wrote:

No. The power to the lamp travels somewhat slower, in the wire, than
c. Nothing, including information, can travel faster than c.

Have you ever seen a proper proof of that statement, or are you just
repeating what you have been told, or have read?
I ask the question quite seriously.

Which statement, the first or the second?

The first is easy to prove with modern test equipment.

The second might be a bit more complicated to prove, as it involves the
whole basis for physics in general.


--
Roger J.

 

[Dominic-Luc Webb]

Of course, you could have some kind of 16 bit register 8 bits
at a time. I need to head home and would have to think on this.
I think there are a lot of people in here that know how to do
this better than me.

Dominic

 

[John Fields]

I'd like to stop here and see how you answer my questions and how
you and others in here respond to my frequency and 555 timer ideas.

---
From me, LOL!

--
John Fields

 

[Danny T]

John Fields wrote:

What _exactly_ do you want to do?

I want to created an led text display (like in the doctors waiting
room!). There's no real reason, I'm just toying around with things (got
a PIC Programmer coming this week) to see how different things can be
achieved (such as sending data to a large number of objects, without a
connection to everyone), for my master plan to take over the world
--
Danny

 

[Danny T]

CFoley1064 wrote:

Go with the HC595N. The "D" is a SMT package. I believe the "AN" is an
extended temp range IC.

The AN is half the price! I was just checking the "Technical Info" PDFs
on rswww, and I can't find any difference (in temp, or anything else) :-\

--
Danny

 

[John Fields]

On 22 Dec 2004 14:17:04 GMT, cfoley1064@aol.com (CFoley1064) wrote:

If you're doing 5X7 matrix displays, you don't have access to all 70 LED pins
anyway. You have to address them as row/column. If you do it that way, you
will minimize the shift register outputs. But, like the professional displays,
you then have to be concerned about a multiplexing setup where you use
persistence of vision to go across the columns fast enough that they don't
appear to flicker.

---
If you're simply scrolling text, there's no multiplexing needed.

--
John Fields

 

[Dominic-Luc Webb]

Danny,

I got a break for a few minutes. Maybe I could interest you in some
generalizations and mental models?

My idea regarding utilizing different frequencies is something akin to
tuning into two or more radio stations simultaneously. Some techniques used
for packet radio also come to mind. Some of these ideas are perhaps
complicated given the present exercise, but on a longer term perspective
they may prove helpful. My own efforts relate to homemade robotic
telescopes for amateur astronomy, so there could be a lot of overlap
with your longer term goals. I am having a lot of trouble with my
website, and plan to move it, but here it is (for now)....

http://www.megspace.com/science/stp/

Some of my thinking comes from concepts like ring tone generators that
have vast numbers of combinations. Every time you dial a telephone
number (hopefully) you reach only one telephone, even though there are
many millions (billions) of telephones out there.

Regarding your parallel port, I have always viewed the data stream from
this device as something much more than just sets of 8 bits. My motor
example demonstrates different frequencies on different pins. Indeed,
the motors end up turning at different speeds and also in different
directions. This port operates at 8 MHz. These motors will not respond
(directly) to such high frequency, and even if it could be done, it does
not appear for now that you are trying to get your LEDs to turn on and
off in the MHz frequency. You can in principle generate a series of
frequencies essentially the same as a set of dial tones. Indeed,
actual dial tones, such as on your telephone, are only in the low KHz
range. All of them (and more) could be generated from a single pin on your
parallel port, and we have not even gotten into subharmonics, which could
also be employed. A typical telephone has 12 tones (if you include asterisk
and pound). Using only these, you have now escaped the binary base 2
system and now have a base 12 system. You have gone from 2^8 (256) values
up to 12^8 (nearly 430 million) values. I cannot imagine you are wanting
EVER to control 430 million LEDs, but I hope I have made a compelling
argument to at least consider frequency as a parameter to extract the
maximum number of outputs from a single 8 bit TTL port, especially, the
parallel port which should have a fixed 8 MHz frequency. And yes, I have
used such strategies with success. Right now, this is about you and your
goal, Danny. My sad story some other time.

Back to the laboratory, I go....



Dominic

 

[Rich Grise]

On Thu, 23 Dec 2004 07:20:43 +0000, Rich Grise wrote:

On Tue, 21 Dec 2004 23:52:05 +0000, Si Ballenger wrote:

pins can be used for clocking theindividual chips You can use two
of the 259 chips in the demultiplex mode to clock the individual
259 chips used in the latching mode. Using the eight parallel
port data pins and 17 259 chips (2 in demultiplex and 15 in latch
mode), you could individually control 120 LEDs.

With three 74HC373
http://www.ortodoxism.ro/datasheets/HitachiSemiconductor/mXqqsxt.pdf
and
one ULN2808
http://www.allegromicro.com/sf/2801/
you can control 128 LEDs if you don't mind multiplexing them.

You'll also need 16 PNP or P-channel high side drivers.

Cheers!
Rich

 

[Rich Grise]

On Wed, 22 Dec 2004 09:17:47 -0600, John Fields wrote:

On 22 Dec 2004 14:17:04 GMT, cfoley1064@aol.com (CFoley1064) wrote:


If you're doing 5X7 matrix displays, you don't have access to all 70 LED pins
anyway. You have to address them as row/column. If you do it that way, you
will minimize the shift register outputs. But, like the professional displays,
you then have to be concerned about a multiplexing setup where you use
persistence of vision to go across the columns fast enough that they don't
appear to flicker.

---
If you're simply scrolling text, there's no multiplexing needed.

If you're just clocking bits through a bank of shift registers, there's
no multiplexing _possible._ You have to be able to control rows and
columns 8 bits at a time. This does reduce the chip count dramatically -
2 vs. 8 for 64 LEDs.

Cheers!
Rich

 

[Danny T]

Robert Monsen wrote:

Sounds easy... But - milliSMOPS? Are you having a laugh? Google
doesn't know what they are either!

I thought you were a programmer. It's common knowledge that a SMOP is an
acronym for "Small Matter of Programming". Thus, a mSMOP is a tiny project.

LOL!!!

I've never heard that term before... Guess I'm only really a wannabe
programmer ;-(


--
Danny

 

[Danny T]

Dominic-Luc Webb wrote:

Danny,

I got a break for a few minutes. Maybe I could interest you in some
generalizations and mental models?

My idea regarding utilizing different frequencies is something akin to
tuning into two or more radio stations simultaneously.
snip

I'm confused now... By frequency, do you mean I can output things
distinguishably different than just the +5v I@m currently sending??

 

[John Fields]

On Wed, 22 Dec 2004 18:45:30 +0100, Dominic-Luc Webb <dlwebb@canit.se>
wrote:

Danny,

I got a break for a few minutes. Maybe I could interest you in some
generalizations and mental models?

My idea regarding utilizing different frequencies is something akin to
tuning into two or more radio stations simultaneously. Some techniques used
for packet radio also come to mind. Some of these ideas are perhaps
complicated given the present exercise, but on a longer term perspective
they may prove helpful. My own efforts relate to homemade robotic
telescopes for amateur astronomy, so there could be a lot of overlap
with your longer term goals. I am having a lot of trouble with my
website, and plan to move it, but here it is (for now)....

http://www.megspace.com/science/stp/

Some of my thinking comes from concepts like ring tone generators that
have vast numbers of combinations.

---
Then your thinking is flawed. The "ring tone generators" to which you
refer can only generate combinations of two tones out of eight. The
system is called 'Dual Tone Multi-Frequency' (DTMF) signalling, and
for a 12 key kepad can generate only 12 combinations of seven tones,
while a 16 key keypad can generate 16 combinations of eight tones.
---

Every time you dial a telephone
number (hopefully) you reach only one telephone, even though there are
many millions (billions) of telephones out there.

---
Yes, but that has nothing to do with the 'base 12' idiocy you
subscribe to and mention later on in this wonderfully illumination
post.
---

Regarding your parallel port, I have always viewed the data stream from
this device as something much more than just sets of 8 bits.

---
Like what, for example?
---

My motor
example demonstrates different frequencies on different pins. Indeed,
the motors end up turning at different speeds and also in different
directions. This port operates at 8 MHz. These motors will not respond
(directly) to such high frequency, and even if it could be done, it does
not appear for now that you are trying to get your LEDs to turn on and
off in the MHz frequency. You can in principle generate a series of
frequencies essentially the same as a set of dial tones. Indeed,
actual dial tones, such as on your telephone, are only in the low KHz
range. All of them (and more) could be generated from a single pin on your
parallel port,

---
Would you please explain how?
---

and we have not even gotten into subharmonics, which could
also be employed.

---
Again. LOL!
---

A typical telephone has 12 tones (if you include asterisk
and pound).

---
Really? IME, for a 12 key keypad there are really only seven, which
are encoded into tone pairs which uniquely identify the symbols on the
keypad, like this:



1209 1336 1477 1633
| | | |
| | | |
697---1-----2-----3-----A--
| | | |
| | | |
770 --4-----5-----6-----B--
| | | |
| | | |
852 --7-----8-----9-----C--
| | | |
| | | |
941 --*-----0-----#-----D--
| | | |

When a key is pressed, two tones are generated and summed
algebraically, and that signal used for signalling. For example, if
'1' is pressed, 1209Hz and 697Hz will be added and sent. "A", "B",
"C", and "D" aren't included on a 12 key keypad, but are shown for
your further edification.
---

Using only these, you have now escaped the binary base 2
system and now have a base 12 system. You have gone from 2^8 (256) values
up to 12^8 (nearly 430 million) values.

---
LOL! You're so full of shit and so full of yourself it's actually
comical to watch you strutting around posturing and pretending you
know something about that of which you have no clue!
---

I cannot imagine you are wanting
EVER to control 430 million LEDs, but I hope I have made a compelling
argument to at least consider frequency as a parameter to extract the
maximum number of outputs from a single 8 bit TTL port, especially, the
parallel port which should have a fixed 8 MHz frequency. And yes, I have
used such strategies with success. Right now, this is about you and your
goal, Danny. My sad story some other time.

---
Blah, blah, blah, blah, fucking blah...
---

Back to the laboratory, I go....

---
Be careful you don't poke an eye out.

--
John Fields

 

[Chaos Master]

Kim Sleep wrote:

Whenever I attempt to add a internal Wireless Network Card into my computer
(Windows XP) my computer "dies". It does turn on, but my screen is blank. I
have tried several cards, from several companies, all with the same outcome.
As soon as I remover the card, the computer comes back to life

Is it a PCI card or PCMCIA card (if using a portable PC)? If it's a PCI
card then maybe it's an IRQ conflict (?) with the video card?

[]s
--
Chaos MasterŽ, posting from Canoas, Brazil - 29.55° S / 51.11° W

"Now: the 2-bit processor, with instructions:
1. NOP - does nothing, increase PC.
2. HLT - does nothing, doesn't increase PC
3. MMX - enter Pentium(r) emulation mode; increase PC
4. LCK - before MMX: NOP ; after MMX: executes F0 0F C7 C8 "

 

[nick]

i am a beginner
"nick" <ucheng4@csc.cuhk.edu.hk> źśźgŠóślĽóˇsťD:1104029136.746838@jupiter.cse.cuhk.edu.hk...

thanks

 

[Active8]

On Tue, 28 Dec 2004 16:54:18 GMT, Monty Hall wrote:

Larry thanks for the response!!!! It's exactly what I was looking for! The
discussion in another subthread w/ Active8 threw me for a loop - as he
didn't believe a negative Iout could exist. Finally, I can ask my real
question...

Told you what you wanted to hear. You need to hang with Paul
Burridge.

If the cap is a current integrator that does the transduction to voltage,

ROFLMAO
<snip>
--
Best Regards,
Mike

 

[Active8]

On Tue, 28 Dec 2004 02:41:26 GMT, Rob Snyder wrote:

Greetings.

I've been studying electronics on my own for a little while now, and
there's one basic concept I can't seem to get my head around. I
apologize in advance for the really basic question, but I just can't
find the answer and it's keeping me up at night.

That's what .basics is for

I thought I understood DC, at least at a primitive level. In circuits
with a battery, things make sense - there is a positive and a negative,
current flows from the negative through the circuit to the positive...
makes sense.

You got good answers here but let me nitpick since you're new.

*Charge* flows. *Current* is *charge flow* So *charge* flows from A
to B. "Current flow" is an expression sometimes hard to avoid. "The
potential difference effects/causes a current in the resistor."

<snip>
--
Best Regards,
Mike

 

[Clarence_A]

<aol12131@yahoo.com> wrote in message
news:1104251648.656434.183880@z14g2000cwz.googlegroups.com...

Posted more trash!

 

Ok the diagram makes since....but I have one question where do I
connect the + and - on the board? Ideally I only wnat 1 wire for + and
1 for -. Thanks.

Keith Fields