Circuit diagram - scoring machine

[SteveQld]

Hi all,

Being new to this ng (like about 45 seconds) I hope this hasn't been asked
before.

I am chasing a circuit diagram for a scoring machine to use in judging at
the local photography club. The system goes something like this:

Three judges each have a small box with 5 buttons. These equate to 1, 2, 3,
4 or 5 points.
The ribbon wires from these boxes run to a junction box whigh then runs to
the scoring box.
The scoring box displays the points for each judge and the total points.
Scrutineers then write down the score on their sheets.
The total score is also displayed on a 9" to 12" high LCD display some
distance away for the audience.
The attendant then resets the score for the next selection.

At the moment we borrow from another club but this is becoming inconvenient.
To date all our inquiries have been fruitless.

If anyone has any suggestions on where a diagram can be sourced your advice
would be appreciated.

Many thanks in advance

Steve.

 

[Ken Taylor]

Hi all,

Being new to this ng (like about 45 seconds) I hope this hasn't been asked
before.

I am chasing a circuit diagram for a scoring machine to use in judging at
the local photography club. The system goes something like this:

Three judges each have a small box with 5 buttons. These equate to 1, 2, 3,
4 or 5 points.
The ribbon wires from these boxes run to a junction box whigh then runs to
the scoring box.
The scoring box displays the points for each judge and the total points.
Scrutineers then write down the score on their sheets.
The total score is also displayed on a 9" to 12" high LCD display some
distance away for the audience.
The attendant then resets the score for the next selection.

At the moment we borrow from another club but this is becoming inconvenient.
To date all our inquiries have been fruitless.

If anyone has any suggestions on where a diagram can be sourced your advice
would be appreciated.

Many thanks in advance

Steve.

It'll be possible to do this with glue logic, but by far the easier and more
functional solution is to use a PIC or other small processor. Do you have
anyone handy who can actually do the construction and programming for you?

Ken

 

[SteveQld]

Yes Ken. We have a few different and relevant occupations in the photo
group and I have relatives that are former and current
technicians/programmers.

We are getting a laptop to run the data projector in the foreseeable future
and that was our other option, to fix up something to run off that.

I would be classed as technically illiterate hence my job is merely to
source the diagram.

Teach me to keep my mouth shut.

Steve.

 

[Jase]

Doh! For a moment I thought he was talking about something else...

Jase.

 

[Mike Warren]

Three judges each have a small box with 5 buttons. These equate to 1, 2, 3,
4 or 5 points.The ribbon wires from these boxes run to a junction box whigh
then runs to the scoring box. The scoring box displays the points for each judge
and the total points. Scrutineers then write down the score on their sheets.
The total score is also displayed on a 9" to 12" high LCD display some
distance away for the audience. The attendant then resets the score for the
next selection.

If you want to use a computer for this I may be able to help. Sounds like a
simple spare time fun project.

-Mike

 

[Ken Taylor]

Um, I'm not sure if you took unintended offence. Believe me, I'm not subtle!
If I'd intended offence, you'd know!

I assumed from the post that you were at least a newbie, hence the question
about what level of assistance you might have at hand. I don't know of any
circuits off-hand which do your function, but it's relatively simple in
discrete logic - basically a bunch of adders and some BCD-7 segment
decoder/drivers. However a PIC or other programmable deive will be a lot
easier to get going hardware-wise, and there's plenty of expertise on the
group to assist with programming. There's also an offer for a PC based
solution - that's not immediately hand-portable, but you could either use
laptops or notebooks, or a wireless keyboard each. Dunno, deserves some
thought.

Cheers.

Ken

 

[Craig Hart]

Hi..

You want the exact circuit diagram for an obviously custom built piece of
equipment? ask the bloke who designed/built it - nobody else will know
unless they dismantle it and reverse-engineer it!

If you want a generic circuit design which achieves the same result
(abviously, using a different specific circuit to the one you currently
use), anyone with relatively basic skills can arrange to design something
that will work - see other posts already made here.