memory

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(?)

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"

"result is perfect. but sometimes it does not start"

This is clearly some new meaning of "perfect" of which we were previously unaware!

That's kind of "perfect in an imperfect sort of way", then?!

I'll tell the QA guys to stop being so negative - everything is "perfect", even if it doesn't work properly!

result is perfect. but sometimes it does not start
Maybe they mean "complete" when saying perfect. This would explain why it does not start: It started some time ago and has ended now?

"Maybe they mean 'complete'"

As in, "complete nonsense" - like the rest of the thread...?

I'm dying to see the "machine" these two are trying to conjure up. Apparently it has something to do with an MP3 Player, a bathroom shower, and a CNC machine that is ok if it runs backwards.

This thread has to be a long-winded hoax...there just isn't any way two people can be this stupid!

R

That is what we hope, even if they are quite amusing.

"... a bathroom shower ..."

Plugged up by the very bushy sister that wears only
tee-shirts who is such a bad cook that she gives her
brother the datashits.

Hi dazheng,

??? why the trollops keep trying to hyjack our project thread ???

i think we must use the secret code to hide detail or they will copy our ideas.

Ive gone back to the playa and want better snd.

I have a pair of unused 5.1 speakers. I was using them with my pc. I want now to use them with my 'television'.
The problem to solve is: The speakers have two stereo inputs.
One for low frequencies, one for middle rage frequencies and one for hight frequencies.

I want to design an active filter that will be able to split the stereo signal from my 'tv' to this three sections of frequencies.

Many years have passed since I was designing filters and I would like your help. i think we need mcu to do it better with lot more code for better sound. If there is a schematics out there it would be great.

plz.U hv to design active filter according to the frequency response of ur speakers.
Then u will get excellent performance from ur filter.
I hv one small swollen key filter design software but unable to upload here.

i know it is need for quick. but i know you are good strong profesional guru that helps again.

Thanks mate

zuisti

... or they will copy our ideas.
Hehe.

Hi dazheng,

sorry for disturbing your delopment but i need more help v fat plz.

I also have have a small buzzer that emits many different sounds and, also, 3 error codes:

1) Bip Bip Bip at 440Hz
2) Biiip Biiip Biip at 700Hz
3) Biiiip Biiip Biiiip at 1150Hz
4) Biiiip Bip Biiip Biiiip at 1295Hz

I want to decode these 4 error codes.
I can't touch nothing (the buzzer, the amp, the sound) than I must use a small little mic to capture the sound/code.

Besides, the buzzer is situated in a crowded place with many people that speaks, screams, cries etc.

Is it possible to do?

Thanks a lot and sorry, another time.

zuisti

the buzzer is situated in a crowded place with many people that speaks, screams, cries etc.

Where is this project going to be located?

Sounds like some sort of torture chamber!

A result of the high over-pressure in the showers.

Bip Bip Bip Biiiip Biiiip Biiiip Bip Bip Bip