newbie question - jeoperdy game circuit

A

Ashton

Guest
Hi,

I am working on some project that works like the Jeopardy Game. What happens
is, there are three teams, with buttons infront of them, and on each team's
desk is a light bulb.

After asking the question, the first one to press the button gets the ligth
go on, on their table, while the rest of the team's buttons are disables,
hence their ligth bulbs dont go on even if they press their button(as ong as
one light is on.. the rest are disabled).

Anyone who can give me an idea of how to do this? I know how to work if it
were only two teams, but what do i use (if realys, any specific one? ) that
would help me resolve this issue?

Thank you for the help in advance,

Ash
 
_/ __
+V -o/ o----|------------| |
| B--|& |o- A
.-. C -|__|
| |
| |
'-'
|0V
_/ __
+V -o/ o---|-------------| |
| A --|& |o-B
.-. C -|__|
| |
| |
'-'
|0V

_/ __
+V -o/ o--|-------------| |
| A --|& |o- C
.-. B -|__|
| |
| |
'-'
|0V
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
Triple 3 input nand gate, eg 4023. Outputs can drive a load through a suitable
interface. Connect points marked with letters as shown.
 
There are also bus-based circuits out there that can run any arbitrary
number of stations. Most are quite simple and one can find several examples
online.
 
How do i work with this situation...

______
inA--------> | | -------->outA
inB--------> | |--------->outB
in-C-------> | |--------->outC
------------

The logic is to be:

Whichever input point is first to send the signal (example, value 1),
then the other inputs are discared, and the ouput goes to the point
that did the first input.

Example would be, if three players press the button, the first player
who presses the button gets the light on his table switch on, while
the other player's lights on their respective tables dont go on, even
if they pressed the button (thats because they pressed it late)

Anything i can use to accomplish this?

Thanks





On 3 Nov 2003 04:15:30 -0800, peg@slingshot.co.nz (GPG) wrote:

_/ __
+V -o/ o----|------------| |
| B--|& |o- A
.-. C -|__|
| |
| |
'-'
|0V
_/ __
+V -o/ o---|-------------| |
| A --|& |o-B
.-. C -|__|
| |
| |
'-'
|0V

_/ __
+V -o/ o--|-------------| |
| A --|& |o- C
.-. B -|__|
| |
| |
'-'
|0V
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
Triple 3 input nand gate, eg 4023. Outputs can drive a load through a suitable
interface. Connect points marked with letters as shown.
Click to expand...
 
ashton <ashton@yahoo.com> wrote:
Example would be, if three players press the button, the first player
who presses the button gets the light on his table switch on, while
the other player's lights on their respective tables dont go on, even
if they pressed the button (thats because they pressed it late)
Click to expand...
Well, you could probably do this with discrete logic, but for a couple
of bucks you could make it with a PIC micro. The cost of the wiring
and the table lights and such are going to swamp the cost differential
between the two, and development kits are pretty cheap ($36 for the
PICkit 1).


--
William Smith
ComputerSmiths Consulting, Inc. www.compusmiths.com
 
Is this for a hobbyist project or a homework problem or school project?

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.


ashton <ashton@yahoo.com> writes:

How do i work with this situation...

______
inA--------> | | -------->outA
inB--------> | |--------->outB
in-C-------> | |--------->outC
------------

The logic is to be:

Whichever input point is first to send the signal (example, value 1),
then the other inputs are discared, and the ouput goes to the point
that did the first input.

Example would be, if three players press the button, the first player
who presses the button gets the light on his table switch on, while
the other player's lights on their respective tables dont go on, even
if they pressed the button (thats because they pressed it late)

Anything i can use to accomplish this?

Thanks





On 3 Nov 2003 04:15:30 -0800, peg@slingshot.co.nz (GPG) wrote:

_/ __
+V -o/ o----|------------| |
| B--|& |o- A
.-. C -|__|
| |
| |
'-'
|0V
_/ __
+V -o/ o---|-------------| |
| A --|& |o-B
.-. C -|__|
| |
| |
'-'
|0V

_/ __
+V -o/ o--|-------------| |
| A --|& |o- C
.-. B -|__|
| |
| |
'-'
|0V
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
Triple 3 input nand gate, eg 4023. Outputs can drive a load through a suitable
interface. Connect points marked with letters as shown.
Click to expand...
 
"Ashton" <asger@raha.com> wrote in message news:<vqbjt7419im647@news.supernews.com>...
Hi,

I am working on some project that works like the Jeopardy Game. What happens
is, there are three teams, with buttons infront of them, and on each team's
desk is a light bulb.

After asking the question, the first one to press the button gets the ligth
go on, on their table, while the rest of the team's buttons are disables,
hence their ligth bulbs dont go on even if they press their button(as ong as
one light is on.. the rest are disabled).

Anyone who can give me an idea of how to do this? I know how to work if it
were only two teams, but what do i use (if realys, any specific one? ) that
would help me resolve this issue?

Thank you for the help in advance,

Ash
Click to expand...

You could try this "Who's First" indicator circuit. It uses 3 parallel
SCRs with a common cathode resistor so only one SCR can be triggered
to light one light. Fairly simple, no micros or logic chips needed.

http://ourworld.compuserve.com/homepages/Bill_Bowden/page7.htm#game1.gif

-Bill
 
...bus-based circuits out there
...one can find several examples online.
Richard Crowley
Click to expand...
Yup. This one's a no-brainer.

Google is your friend, Ashton; learn to use it.
Observe my example:
http://www.google.com/search?num=100&hl=en&lr=lang_en&ie=UTF-8&oe=UTF-8&q=game-show+circuit+first+-network&btnG=Google+Search
 
On 3 Nov 2003 04:15:30 -0800, peg@slingshot.co.nz (GPG) wrote:

_/ __
+V -o/ o----|------------| |
| B--|& |o- A
.-. C -|__|
| |
| |
'-'
|0V
_/ __
+V -o/ o---|-------------| |
| A --|& |o-B
.-. C -|__|
| |
| |
'-'
|0V

_/ __
+V -o/ o--|-------------| |
| A --|& |o- C
.-. B -|__|
| |
| |
'-'
|0V
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de
Triple 3 input nand gate, eg 4023. Outputs can drive a load through a suitable
interface. Connect points marked with letters as shown.
Click to expand...
Andys is not made for a lot of wires. Draw it out. The first switch
will inhibit others. Output is logic low, uses 1 very cheap IC. Speed?
Have not checked all available chips (and the one suggested is not
alone) but the res sponse time is sub microseconds
 
On Sun, 2 Nov 2003 22:46:46 -0500, "Ashton" <asger@raha.com> put
finger to keyboard and composed:

I am working on some project that works like the Jeopardy Game. What happens
is, there are three teams, with buttons infront of them, and on each team's
desk is a light bulb.

After asking the question, the first one to press the button gets the ligth
go on, on their table, while the rest of the team's buttons are disables,
hence their ligth bulbs dont go on even if they press their button(as ong as
one light is on.. the rest are disabled).

Anyone who can give me an idea of how to do this? I know how to work if it
were only two teams, but what do i use (if realys, any specific one? ) that
would help me resolve this issue?

Thank you for the help in advance,

Ash
Click to expand...
http://www.designnotes.com/CIRCUITS/quizmaster.htm
http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem.html#ASCIISCHEM_002
http://www.mitedu.freeserve.co.uk/Circuits/Misc/quiz.htm


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
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