memory

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 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

"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."

So, if I run at the high speed I should get the
polywronglene ones? Since those are much harder
to come by, I'll change the gating clocker to do
low speeds. OK?

"a op amp is as different to a
'analogue ic' as a apple is
different to an cow,"

No, an op amp is as different to a 'analogue ic'
as a nectarine is to an badger.

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

Yikes! Is that all? Since we're fond of
the word "trollop" here ... Nuf said. ;-)

 * 5A3266E3-82B2-4DCB-8A0C-23BE1236021C still wonders if the mains is only 110V, or if the decouplingof the MCU will be to 220/230V AC.

 * 5A3266E3-82B2-4DCB-8A0C-23BE1236021C also wonders which newspaper that will publish pictures of thelittle oops.

 * 5A3266E3-82B2-4DCB-8A0C-23BE1236021C further hopes no ambulance will be needed.

Hi dazheng,

I know you rbusy but i really need some advice from the programmer guru plz.

what is 'port change interrupt' (ports 4,5,6,7) means ... is it port change from low to high or high to low analog signal(?) or a changes of digital signal ie from 5V to 4.7V or 4.26V?

i need to further reduce the power consumption, all unused of hardware peripherals should be disabled. The pullups should be replaced with external resistors, and the internal pullups disabled with a resistor.but what value(?)

please be generous with your wisdoming voice.

Thanks,

zuisti

"what is 'port change interrupt' (ports 4,5,6,7) means ... is it port change from low to high or high to low analog signal(?) or a changes of digital signal ie from 5V to 4.7V or 4.26V?"

Such silly questions.

Such a waste of a guru's time.

"what is 'port change interrupt' (ports 4,5,6,7) means ... "

Good grief. Just look it up. No wonder our project sucks so bad. You're just mucking about blindly without reading a thing.

GET WITH THE PROGRAM!

"is it port change from low to high or high to low analog signal(?) or a changes of digital signal ie from 5V to 4.7V or 4.26V?"

Yes.

internal pullups disabled with a resistor.but what value(?)
This is an easy question. You need a resistor with the same value as the data sheet specifies for the internal pull-up, but with a negative value. Alas, negative resistances are a bit harder to manufacture, so it may affect your production cost slightly. I haven't seen anyone manufacturing monolithic negative resistors, but with a suitable power source and your loved op-amps, you may even produce your own negative resistors :)

morning dazheng,

ive been working for too long but making progress.

thanks for your guru advise.i now have another bug found but with the MCU talking but have talking between them wrong.

I am new to 874C35 and want to play with it. So I need to build a programmer. Please advice me which programmer should I build considering most supported device including 874C31, which also supports WINMCU200, heard it is very handy than ic-prog. Found this MCU programmer based on JIT programmer and seems handy to me because it supports both LRP and HCAP. Does anybody used this programmer ? Does it supports winmcu800? If so how to configure ?

i know you are busy but your experiece is needed for my helping .

yawn yawn.

zuisti

Hi zuisti mate,

the 874C35 looks good.i have the datashits and i like facilities. the Programmer is not so easy to find and i saw 874C31 also but is diferent(?)

I look more for you.

can you give me profesional advise now please on motor drivers.

you were lookin at the efkar motor driver circit i think and i want to see schematic essentials exigent,

please assistance please

qotd

Remember! You are unique, just like everybody else.

great huh?!?!