memory

"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?!?!

"Does anybody used this programmer ?"

Yes, somebody does.

"Does it supports winmcu800?"

Just like it says on the tin.

"If so how to configure ?"

Fill in the options under the configuration menu.

"i have the datashits ..."

Ugh! Depending on their orientation "at exit", the ones hurt worse than the zeros, don't they?

"diferent(?)"

Right, you're wrong.

"please assistance please"

I hope you cure those datashits soon. You're really stinkin' up the joint. No assistance however. You do your own wiping.

dazheng,

the efkar motor driver circuit is simple but has lots of pins to connect up for the steppering.I had tried a stepper motor controller n driver with L5297 + LR623 and result is perfect.but sometimes it doesnot start and sometimes goes backwards(?) you will use this circuit in the purposed CNC machine.

see home.att.net/.../MD4.html

i think we could make it beter.yes(?)

"backwards(?)"

Yes, good one. A silver star for you.

"i think we could make it beter.yes(?)"

"beter"? No.

"better"? Yes, but no.

In any case, no you couldn't make it better.
Even the best CNC machines sometimes don't start.
That's just the way they are.
CNC motion includes going backwards.

Don't worry.

No improvement needed.

Hi ziusti,

do we we get the 2543b? i think the nmck-45892zr is better(bcoz bigger voltege).

And my proposition is an additional soft-start circuit with an R-LC and an SiAg-diode ...

does you somone have an idea of how to do a control of an induction single phase motor , i ve done one project in my life but it was for three phase, it was depending on the fase angle i think been a long time ive done it, do ou think i can use this priciple with a single phase motor that is monitor the phase via an opto coupler fed to a mcu and the mcu drive an optocouple to drive a triac by pwm?, my pump is is rated 0.5hp my problem is that i have installed a pump for my bathroom and the maximum pressure for my shower heater is 3 bars and my pump is working at 4 bars, the main problem i fear is that the pipes in my shower get damaged quickly and secondly the frequent start of the automatic pump will damage the stator of my motor.

if she goes backward the water is suck up shower; LOL

thanks in advance

"do
we
we
get
the
2543b?
i think
the
nmck-45892zr
is
better(bcoz
bigger
voltege).

And
my
proposition
is
an
additional
soft-start
circuit
with
an
R-LC
and
an
SiAg-diode
...

does
you
somone
have
an
idea
of
how
to
do
a control
of
an
induction
single
phase
motor
, i
ve
done
one
project
in
my
life
but
it
was
for
three
phase,
it
was
depending
on
the
fase
angle
i think
been
a long
time
ive
done
it,
do
ou
think
i can
use
this
priciple
with
a single
phase
motor
that
is
monitor
the
phase
via
an
opto
coupler
fed
to
a mcu
and
the
mcu
drive
an
optocouple
to
drive
a triac
by
pwm?,
my
pump
is
is
rated
0.5hp
my
problem
is
that
i have
installed
a pump
for
my
bathroom
and
the
maximum
pressure
for
my
shower
heater
is
3 bars
and
my
pump
is
working
at
4 bars,
the
main
problem
i fear
is
that
the
pipes
in
my
shower
get
damaged
quickly
and
secondly
the
frequent
start
of
the
automatic
pump
will
damage
the
stator
of
my
motor.

if
she
goes
backward
the
water
is
suck
up
shower;
LOL"