Logisim circuit problem

zhaniko93

New Member

• Jan 18, 2011

• #1

Hi all.
I've made a circuit and have faced a problem:
why does "that one" (see in circuit) change when DMX changes from pin 2 to 3? click on "clock" four times and you will see the problem. p.s. I'm newbie to digital logic but I know how latches, flip-flops, Mux or gates work, I need to know furter, I mean, see how the concrete circuits work, I hope you got the point. can you suggest any web site or forum or book or article or something? so, here's the circuit and see my problem

 

Attachments

• JaKo.zip

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KMoffett

Well-Known Member

• Jan 18, 2011

• #2

I think you first need to post a circuit diagram image that people here can see...jpg...png...gif...pdf. I have no idea what a JaKo.circ file is.

Ken

 

Grossel

Well-Known Member

• Jan 18, 2011

• #3

Also what program does it belong to?

And does it exist some simple viewer software to the program you're using? Just like autocad, MS Office etc. . .


[edit]
The compressed file turns out to be a XML-file. The first lines says:

Code:

<project source="2.6.2" version="1.0">
This file is intended to be loaded by Logisim (http://www.cburch.com/logisim/).

Ok. then. Not so bad since it's a GPL license program.

[edit2]
Duh, Software name in subject field

Here's the chematic as png-file:

 

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Last edited: Jan 18, 2011

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KMoffett

Well-Known Member

• Jan 18, 2011

• #4

I hate to load whole programs to view one schematic. I see that it exports to a .gif file.
Kahniko93, export and post that.

Ken

 

zhaniko93

New Member

• Jan 18, 2011

• #5

Yes but it doesnt say anything much, I am more interested about your suggestions of learning logic devices (see my first post)

 

zhaniko93

New Member

• Jan 18, 2011

• #6

I have made it easier to see the problem please someone help me why does the flip-flop change D on DeMUX-s "three"? when demultiplexed bit is 3, flip-flop changes value. please download and check.

 

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zhaniko93

New Member

• Jan 18, 2011

• #7

heres the picture for people who dont have logisim

 

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• untitled.GIF

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zhaniko93

New Member

• Jan 18, 2011

• #8

here if i press A, D will go to 0 and I dont have a clue why (the second picture is when I clicked on A)

 

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Last edited: Jan 18, 2011

zhaniko93

New Member

• Jan 19, 2011

• #9

I think that it's becouse of that:
when I click, firstly first latch changes and in picoseconds second, and while this picoseconds, 01 is being sent to Demux thats the reason. Am i right? how to correct this?