memory

dazheng,

your a great programmer man.sector size woz wrong!

Rego has been working now on a conversion to Proton Basic (I don't have skills about MCU basics yet, as I wrote).
I somebody want to do this, my C source is simple and easy to understand I think...

i like your project much,and it is a good effort from
u (converting it to JavaC project) but how about writing a (v.b interface to it) it will
be very cool....

also did u test the real hardware (ig is there any problem in led power or anything like this)

this project can be upgraded with many opinons..

But ... my dear friend, please post your minds, repairs and opinions here!

dazheng,

your a great programmer man.sector size woz wrong!

Rego has been working now on a conversion to Proton Basic (I don't have skills about MCU basics yet, as I wrote).
I somebody want to do this, my C source is simple and easy to understand I think...

i like your project much,and it is a good effort from
u (converting it to JavaC project) but how about writing a (v.b interface to it) it will
be very cool....

also did u test the real hardware (ig is there any problem in led power or anything like this)

this project can be upgraded with many opinons..

But ... my dear friend, please post your minds, repairs and opinions here!

"your a great programmer man."

Not true!

I am a great programmer.

"... my C source is simple and easy to understand I think."

Yeah, "you think", but you're wrong.

I've shown code from both of you around the shop here. They just laugh.
It's really pretty sucky code. No wonder the prototype is so unstable.

dazheng,

now i got a hard question for yew hardware guru......

I need to choose a capacitor. Does you know how to choose right capacitor for example if we want to use 100 uF caps but with what suitable voltage because when we want to buy caps, the supplier asks "what voltage?"

i asked Rego and he says:

you need to know the maximum voltage across the capacitor in your application . for example if you put the capacitor in parallel with the voltage source, you choose the voltage capacitor higher than the voltage source. Vsource=12V -> Vcap=16V tipical values of voltage are 6.3V, 16V, 50V this are normalized And you need to know the maximum current in your application. For example if your power supply is for 1A current it might be nessesery to take 100uF capacitor for higher voltage because they are more powerfull and you will can get hier curr ent from them and can blow youre socks off!

is he right?

Note
This message was edited to reduce width.

you
need
to
know
the
maximum
voltage
across
the
capacitor
in
your
application
.
for
example
if
you
put
the
capacitor
in
parallel
with
the
voltage
source,
you
choose
the
voltage
capacitor
higher
than
the
voltage
source.
Vsource=12V
->
Vcap=16V
tipical
values
of
voltage
are
6.3V,
16V,
50V
this
are
normalized

And
you
need
to
know
the
maximum
current
in
your
application.
For
example
if
your
power
supply
is
for
1A
current
it
might
be
nessesery
to
take
100uF
capacitor
for
higher
voltage
because
they
are
more
powerfull
and
you
will
can
get
hier
curr
ent
from
them
and
can
blow
youre
socks
off!

Of course he is right.

Too low voltage on your cap and you will loudly hear it protest!

Too high ripple current on your cap and it will get too hot.

It's only in school books you may talk about ideal components. In real life, there are always more than one parameter to specify when selecting components.

Some i, eh poster posted using pre !pre or some other 'technique' making it a pain in the gluteus maximus to read all entries.

Anyhow the post has wandered off, I do not see what camacitor voltage has to do with the original subject.

Erik

The original subject?

Oh, you mean the use of this forum as a private message board?

If the Keil staff just press delete on this kind of threads, people will learn - or at least select other sites.

I sure hope the thread DOESN'T end. How often is it that the rest of us can get an "inside" look at the caliber of programming used by such industry giants as Mattel?

These guys are geniuses! I just hope that they collaborate on a book!

You know...if you take the brain power of these two guys and just figure out a way to harness it...you might be able to toast bread! Lightly.

There are more than one way to toast bread. The only common part is the required heat and the burning smell :)

Hi dazheng,

hope you had a good weekend.I saw you're sister over at the mall on saterday.i was waring a teeshirt ;-)

The latest work is a verrrry Interesting Project... and I really like it very much...... I know saying thank you is not enough for your hardwork and cleverness at doing this project..... but thats all i can do for the now.

I have build an app to work with the lovely app from jenjen.

Can you test it because i have very limit time now and tell me if working ?

Also if you want anything to add.

file is at the usual place.

The upload has problem or it limitation ?

yes i think the system could crash, but in my project i only use the lpt & the screen. if you think that the system would be stable. But my questions is what happens with MCU, maybe MCU dont like working without interruptions.i don't need to get back to MCU once my programm has finished.

this is like an embedded project the pc only has to show the signal from the picture in the screen.

Thanks

zuisti

Hi "zuisti",

ya, i know you saw her.our mum wasnot happy :O

Thanks for the compliments. but remember that the project wouldnt be so good if you werenot there to give me good profesional help and advise. i trust Your wisdnom and experience .

Rego was near right with capacitor. but he is not so profesional and right always ;)

best advise is have a capacitor that is biger for what you need. so if you need 50poofs you can use 100poofs (or more) and it will be ok. you MUST connect the right way or they pop!

your friend,

dazheng

No, poof capacitors (pF) are not polarized.
Poff capacitors (electrolytes and tantals) are polarized.

The question here isn't if the capacitance should be doubled, but what voltage it should be, and if the ripple current is high enough that the ESR must be considered.

Hi again zuisti,

i check with jafnek about capacitors.he says that you should try to get the mylar ones bcoz they are more cheep and best for digital MCU baords. bcoz your board is more that 50meg you dont want the polyproperlene ones.he says they are no good at are not good at high speeds.

forget trollop bcoz he does npt know. if you connect wrong way(to mains) the capcitor will pop.

You really are a funny guy. The metallized polyester caps are not polarized...

And by the way - are you going to decouple to mains...

"The latest work is a
verrrry Interesting Project...
and I really like it very
much...... I know saying thank
you is not enough for your
hardwork and cleverness at
doing this project..... but
thats all i can <do for the
now."

Please cease the slow keyboard fingering. The
"rrr" and "...." nonsense is discredits our
project. We are being ridiculed.

"But my questions is what
happens with MCU, maybe MCU
dont like working without
interruptions."

Next time I think we shouldn't be so parsimonious
and should pay additional for the non-lazy version
of the MCU.

Hi dazheng,

YAAAAAAA.I found the answer to last week and i think we can go for it.

A op amp may be analogue in design but it is frequencly used in digital equipment, i.e. analog to digital converters , esp 'flash' conversion... the question asked is difficult to answer because it is phrased badly..
a op amp is as different to a 'analogue ic' as a apple is different to an cow, a analogue(?) ic may contain op amps, but it will also have other 'stuff'... an op amp is just that..no more

can we connect them togethr and make an automatic MCU input for the module?

the code for the capacitor is ok qnd i will get some tomorrow.the MP3 file is now working and i only get a jump each 27 seconds. you were very right with the sector size.

pleas e give me advise and your wisdom again.

Thanks

zuisti