Counter with increment acknowledge

[Baroje]

I thank you all for your help. I try to work something out. Only I know now
that there is people always ready to help. I think I'll go for the micro
switch, or if it won't be mechanical counter I'll try to monitor LSB.

THX Again


"Rich Grise" <spamdump@nowhere.net> wrote in message
news:3FDAA3D2.EEA2FBEA@nowhere.net...

Or a spycam in their office. ;-)

Rich Grise wrote:

How much money do these people have? What kind of display? Point
an array of photodiodes, or a CCD camera at the displays, and
analyze its output. When one of the digits changes, you've
counted. Actually, you only need to watch the LSB. Maybe
a tiny photodiode very close to each LED segment. If it's
an LCD, then you'll probably have to look at the input
signals, unless you have a photosensor that can read an
LCD. Otherwise, tear into the circuit and monitor the
outputs of whatever's driving the display.

I'd be cheaper to hire bonded employees.

Good Luck!
Rich

Baroje wrote:

"Rich Grise" <spamdump@nowhere.net> wrote in message
news:3FD9AFD5.D960C81A@nowhere.net...
Then monitor the state of the button signal at the point where it
enters the counter. If you can not trust that your counter
increments
when it receives that button-press signal, then you have a defective
counter.

It's just that simple.

And what specifically is the application about? Can you describe
what is being counted? Where are these people standing or sitting?
What do they see? That sort of thing. We're all insatiably curious,
you know.


This application is about railway safety. My customers want to have
double
security and there is nothing I can do. It needs to be done no mather
what.

It is something like this. The trains are passing through the station
or the
switch and we are counting them. That's where I need a counter. The
counter
is either automaticaly increment or by the railway staff on the
station. For
some reason the bastards on the railways want to have a electrical
signal
from the counter to confirm its incrementing, they do not want to
confirm
the incrementig using the input signal in the counter. They say
somethin
like this: " Ok, there is input signal and after that the counter is
incremented, BUT what if there is somekind of error (due to weather or
any
other reason) and you have an input signal but the counter does not
increments itself. We want to have independent (independent from input
signal) confirmation of the incrementing"!

It is very important from the safety stand to be absolutely sure about
the
number of trains in one rail section!

Thank you for your time.

Hrvoje

Thanks,
Rich

Baroje wrote:
...
No.

What I need is a singal from the counter and not from the button.
THe
button is pressed OK, I trust that, the counter increments and
here I
need
confirmation so that for example on same distance, where I cannot
see
the
counter I know that counter realy did increment. Important thing
is that
I
do not need to know the state of counter on the distance but only
did it
or
did it not increment!

 

[Brian Oakley]

I
"Baroje" <hrvoje.baricNOSPAM@zagreb-signal.hr> wrote in message
news:br9csa$lqf$1@ls219.htnet.hr...

Hello!

I need a digital counter which has the ability of sending the
acknowledgement signal on one of its outputs! I need to be 100 percent
sure
that counter is incremented when button is pressed or some other event
ocur!
When counter is incremented electrical signal must be send to one of the
counter outputs so that some other device can know for sure that the
counter
was inrcemented.

Where can I buy counter with this ability or if not how can I modify one
of
the existing counters to act like I want and need???

TNX

It seems after all these good ideas that there is one problem. Even if you

receive some sort of acknowledgement that the counter has incremented, you
dont know that it has actually made the count. In otherwords, say the train
comes through and the circuits indicate an increment of the counter, but the
actual number in the counter, for whatever reason, does not change. Then
your stuck with a false count. The ONLY way you can KNOW that the counter
has actually incremented is to LOOK AT THE COUNTER DISPLAY. If you are going
to trust that a signal is telling you it has incremented, you could just as
well trust the signal from the switch that increments the counter. Its
either/or, but you still dont KNOW its incremented without seeing the
counter. You either trust the circuit to do its job, or you babysit it to
make sure it does it, then you kill the whole reason to have an automated
counter. The BEST way to implement a relatively safe system is redundancy
in the counters and circuits. Then you periodically compare the counters
either manually or by a software program. If the numbers are the same, the
software just keeps comparing. If for some reason the two counters get out
of sync, then the software can send an alarm to you so you can check the
counters. That would be what I might do. Hope this helps somewhat. God
bless.
Brian

 

[CWatters]

"Brian Oakley" <brianoakley@ispwest.com> wrote in message
news:brgtnp0utu@enews3.newsguy.com...

It seems after all these good ideas that there is one problem. Even if you
receive some sort of acknowledgement that the counter has incremented, you
dont know that it has actually made the count.

Heck if you are that worried you could have a computer "look" at the counter
with a camera and do image recognition on it to be sure if changes before
sending the acknowledge... or perhaps have the operator at the other end
retype the number back and send it to the button end for checking.