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 Post subject: Matrix mod (my first small mod)
PostPosted: Sun Feb 19, 2012 4:37 pm 
8086
8086

Joined: Mon May 02, 2011 6:50 am
Posts: 51
Hey guys. As I'm waiting on ivy bridge to be released, I decided to go ahead and get myself a computer case. Corsair Obsidian 800D. I decided to go with the matrix look, since I'm a big fan of that movie. The mod was straight-forward and easy, but tedious. It took me about 6 hours to cut everything, but I really like the results. Also I didn't paint anything, so in the future if I want to change the "theme" of the case, it's just a matter of removing a piece of paper.
Anyway, here is a pic. I hope you like it. Any comments or ideas are welcome... Critique is welcomed too although keep in mind that I'm a crappy artist and this is my first mod :D
Image


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Sun Feb 19, 2012 5:24 pm 
Thoroughbred
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Do the lights scroll?


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Sun Feb 19, 2012 6:07 pm 
8086
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Not yet, but I plan to make them scroll. I just have green CCFLs at this point.


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Sun Feb 19, 2012 9:07 pm 
Thoroughbred
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I'd make several rows of LEDs, one for each row of characters, and hook them up to an Arduino and write a simple program to scroll it. Or, you could do something with a 555 timer and a counting circuit.
This of course is only if you are willing to learn basic electronics, like how to solder (it really isn't that hard. I taught myself in a half hour.).


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 5:07 am 
8086
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Joined: Mon May 02, 2011 6:50 am
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Yeah, I was thinking to use latches and a 555 timer with white less, because usually the bottom character of a column is white.

P.S. im an EE student ;-)


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 9:16 am 
Thoroughbred
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Yay! <bounces up and down excitably>
Finally, someone who understands soldering isn't as hard as everyone says!
For something with the white bottom row, I'd do an Arduino or other microprocessor setup. This'll give you more control and allow you to hook up more.

Pseudocode:
Code:
Set a variable to 0.
If variable = 0, then light [white light row 1]
If variable = 1, then turn off [white light row 1] and light [green light row 1] and [white light row 2]
etc.


If I have more time later, I just might code a program like this. I need a new project. :mrgreen:


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 9:24 am 
8086
8086

Joined: Mon May 02, 2011 6:50 am
Posts: 51
I don't have an adruino, usually I just use AVR microcontrollers. I have 14 columns and tallest column is 9 characters tall (crud, should have thought of it before and made it 8 chars tall, oh well). SO I'm going to use 4-to-16 decoder, and blink one column of LEDs every time, then switch to the next column and blink it, and so on. Essentially a mini version of progressive scan, while having the whole logic and snap-shots on the chip. This will allow me to introduce asynchronous threads (eg. column 4 will fall down faster then column 6).

I can make PCBs too, so I'll use side mount packages to decrease the size (SOP, or QFP). My only concern is to get LEDs at the right angle to light up the columns.


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 12:20 pm 
Thoroughbred
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New idea: A 555 timer at a different speed per line, and a pair of 4017s per line, one to do the leading white edge and one to do the green trail. This would actually probably be better done with an AVR, though this rout would get you a lot of geek cred.

An Arduino's just a ATmega AVR with different programming. I'd look into it, as it's simple and works for a low price.


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 12:53 pm 
8086
8086

Joined: Mon May 02, 2011 6:50 am
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Ooo 4017 is nice, forgot about those. But why would I have a green LEDs if the whole case is glowing with green? I was just thinking to accent it with white light.

If going the white and green LED way, though, I think it'd be easier to have an output of 4017 powering a White LED, while green LED at the same location should be connected to the same output BUT through the inverter. That way 'As long as I am not white, I'm green'


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 Post subject: Re: Matrix mod (my first small mod)
PostPosted: Mon Feb 20, 2012 1:32 pm 
Thoroughbred
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That sounds good.

Now I just have to recode my laser tag set. I forgot to back up before that last Windows reinstall :p


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