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'[PIC] Board just about good to go?'
2008\06\29@130833 by Tomás Ó hÉilidhe

picon face

* No driver chips
* 3-pin LED's replaced with 2-pin LED's

OK here's the very latest:

http://users.imagine.ie/toe/scoth3.pdf

I'll have two LED's lit at a time. I really thing I've hit the bull's
eye with this one.

As always, comments, questions, suggestions welcomed.

2008\06\29@133244 by Spehro Pefhany

picon face
At 01:07 PM 6/29/2008, you wrote:

>* No driver chips
>* 3-pin LED's replaced with 2-pin LED's
>
>OK here's the very latest:
>
>http://users.imagine.ie/toe/scoth3.pdf
>
>I'll have two LED's lit at a time. I really thing I've hit the bull's
>eye with this one.
>
>As always, comments, questions, suggestions welcomed.

Suggest you breadboard it.



Spehro Pefhany --"it's the network..."            "The Journey is the reward"
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2008\06\29@204308 by Jinx

face picon face
> Suggest you breadboard it

Second that

Tomas, sometimes you just have to get your hands dirty. If someone's
god is smiling on you, things may go well. Sometimes they don't go so
well. Sometimes, after a solid week of figuring out, running around
getting bits and putting together they go horribly tits-up. But at some
point you have to dip your toe in the water. This is your point. Are
you ready ? Do I get a Booyah !!! ?

2008\06\30@051052 by Tamas Rudnai

face picon face
Tomas,

May I suggest to use the same subject with all the conversations for the
same topic? It is really hard to follow up what was going on with your
project, who did suggest what previously etc.

Thanks
Tamas



On Mon, Jun 30, 2008 at 1:42 AM, Jinx <.....joecolquittKILLspamspam@spam@clear.net.nz> wrote:

{Quote hidden}

> -

2008\06\30@130001 by Martin

face
flavicon
face
Do you think you could consolidate your micro-thoughts into at least a
paragraph before starting a new thread?
Some people don't read every message posted to the list and have NO idea
what you are talking about when you start 100 new threads for your one
project.
-
Martin

Tomás Ó hÉilidhe wrote:
{Quote hidden}


'[PIC] Board just about good to go?'
2008\07\01@071614 by Justin Richards
face picon face
Hi Tomas,

I agree with Olin when he mentioned that you should draw schematics
conforming to some of the accepted standards.

The "L" shaped pic chip may help for you but it just looks odd.  I
know it would be a lot of work to redraw but I have found (i am also
an amature) that later on I come back to something that I have drawn
correctly no matter how simple and find I am proud of my efforts.  The
horrible stuff I have done always looks horrible and not something I
want other people to see.

I am not sure but I think Eagle provides a schematic capture that is
free for some use, not sure what you are using but think you could
find something better perhaps.  Out of curiosity what are you using as
a drawing package.  I am in no real position to comment but as you
have asked for comments I thought I would throw in mine.

Apart from that I havent really been following what you plan to do
here but i am guessing the game is an electronic version of the
Connect 4 game.

If this so then I guess you are going to strobe the leds (I assume
they are leds and cant really be sure from the diagram).  If so, at
what rate do you plan to do this.  I am always a sucker for using
shift registers to do this type of thing.  Clock the pattern in then
latch to the outputs.  I seem to use shift registers for everything
that is low speed and allows the use of light weight pics.  this may
have been mentioned already.

Have you thrown together any ideas for the software solution as i am
curious how you would go about this.  For me as an amature it is a
good problem for me to think about and try and solve.  I always find
it a little diificult to get my head around the fact that the
processor can go off and do something else (ie stop strobing) without
the observer aware that the LEDS are off as it happens so quick.

Have you done any testing/experimenting to confirm any suggested
solutions.  It would be great to hear the results.

Cheers Justin

2008\07\01@112934 by Tomás Ó hÉilidhe

picon face

Justin Richards wrote:
> The "L" shaped pic chip may help for you but it just looks odd.  I
> know it would be a lot of work to redraw but I have found (i am also
> an amature) that later on I come back to something that I have drawn
> correctly no matter how simple and find I am proud of my efforts.  The
> horrible stuff I have done always looks horrible and not something I
> want other people to see.
>  

In my own humble opinion, I quite like my schematic :-)

> I am not sure but I think Eagle provides a schematic capture that is
> free for some use, not sure what you are using but think you could
> find something better perhaps.  Out of curiosity what are you using as
> a drawing package.
>  

Protel 99 SE. It's the one I learned to use in college, plus it does the
trick for me.

> Apart from that I havent really been following what you plan to do
> here but i am guessing the game is an electronic version of the
> Connect 4 game.
>  

Exactly, a portable electronic Connect4 game running off two AA batteries.

> If this so then I guess you are going to strobe the leds (I assume
> they are leds and cant really be sure from the diagram).  If so, at
> what rate do you plan to do this.

Dunno yet, I'll play around with it. I think I'll be strobing them as
slowly as possible though so that they're nice and bright. (Of course
though if I go *too* slow there'll be flicker).

> I am always a sucker for using
> shift registers to do this type of thing.  Clock the pattern in then
> latch to the outputs.  I seem to use shift registers for everything
> that is low speed and allows the use of light weight pics.  this may
> have been mentioned already.
>  

That's is what I did in my original design:

freepdfhosting.com/uploads/ecd5d5060f.pdf
 
You'll notice the blatant lack of current-limiting resistors :-P

Also here's a poor quality YouTube video of the game in action:

http://www.youtube.com/watch?v=Kd1axFR-zLk

 
> Have you thrown together any ideas for the software solution as i am
> curious how you would go about this.  For me as an amature it is a
> good problem for me to think about and try and solve.  I always find
> it a little diificult to get my head around the fact that the
> processor can go off and do something else (ie stop strobing) without
> the observer aware that the LEDS are off as it happens so quick.
>  

I've already got the software written. I took up programming as a hobby
when I was eleven; I've been at it for ten years now so the Connect4
program didn't pose too much of a challenge. The most involved piece of
code I had to write for it was determining if the game had been won by
diagonals.

> Have you done any testing/experimenting to confirm any suggested
> solutions.  It would be great to hear the results.
>  

My original board works perfectly but the PIC chip dies after about a
week of action, presumably because of the lack of current-limiting
resistors.

I'm redoing the project at the moment using the PIC16F887, which has
plenty more pins so I can do away with shift registers and encoders.

2008\07\01@114508 by olin piclist

face picon face
Tomás Ó hÉilidhe wrote:
> In my own humble opinion, I quite like my schematic :-)

When you're asking others to do a favor and look at it, you should make is
less annoying for them.

> I think I'll be strobing them as
> slowly as possible though so that they're nice and bright.

Explain how the refresh frequency effects the preceived brightness.


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2008\07\01@121413 by Tamas Rudnai

face picon face
> In my own humble opinion, I quite like my schematic :-)

Tomas,

Everyone has his/her own likings. I have loads of sketches and notes that
noone can understand but I like it because I know what it's all about and is
very short to write and read. However, if I ask a help I do not expect
people to understand it, I put it into a form that they familiar with.
Standards are not made to have something to deviate from. Now you use L
shaped PIC, next time you use circle for diode as you like that way better?
At the very first time I saw your schematics I thought that was a big margin
all around your circuit.

You are getting arrogant here? If many people would say that something I
have to change on my work or on my behaviour probably they are right. I
cannot say that everyone is stupid and I am the only genius on Earth. Your
behaviour is absolutely ridiculous!

But you know what? Maybe you are right, everyone is stupid here, so as the
more and only one intelligent here, please change your schematics to a form
that we stupid humans can understand and also your point of view to nice
sentences with detailed explanations in a way that we can have a picture of
your brightness ideas even if we have half of your IQ.

Tamas


On Tue, Jul 1, 2008 at 4:28 PM, Tomás Ó hÉilidhe <toespamKILLspamlavabit.com> wrote:

{Quote hidden}

>

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