Casemod project

I'm working on a casemod which has a row of LEDs lighting up in sequence inside an old 5.25" floppy drive. Read all about it here. Does anyone here know about this sort of stuff? Am I going about it the right way?

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher

Why are you casemoding an old floppy drive :O

I threw out mine years ago!

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God got tired waiting all sunday for the world to compile and finaly had it.
On the Eight day, god created func_details, and he saw that it was fast.

Why not? It wasnt doing any good before... its sacrificable. Also I think the disk slot is just right to make it look cool.

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher

A few things I can think of:

1)A 66% duty cycle and a 50% duty cycle are equally easy to implement.

2)A 5Hz Clock may be a little too fast, unless you're dividing it. Have
you checked whether the effect is visible with that clock? A 1Hz or 2Hz
clock might suit your requirements better.

3)Get a circuit simulator to test out what you're doing. Multisim is
good, but you have to pay for it (or buy a book called Digital
Principles and Design by Donald Givone, then it's free). It'll save you
a lot of heartache and burnt components later.

4)Get a 7495 instead of the 74194. It's easier to find and has both
serial and parallel input, which is very useful if you're planning on
having multiple patterns. It is also a 4bit L/R shifter,so your
circuit stays the same.

5) Your circuit looks okay at first look, but I can't be sure. These
chips heat up and burn out very fast if you've done something wrong,
especially flipflops. Make sure you have the patience to keep trying.
Again, get a simulator to test what you're doing.

I haven't worked with these for a long time now, so if anything goes boom...

Thanks for the suggestions Frag. I know its only a matter of resistor values, I chose 66% so both resistors could be the same. I dont think 5hz is too much, I've got 12 LEDs so it will take about 2s to scroll each way. I'll test it out on Pspice tomorrow to make sure it all works :smile:

Thanks a lot for the IC suggestion, I'm looking at the 7495 data sheet now. It looks like if I use this I'll have to do a lot more wiring, but I couldnt find anywhere that sells 74194, hopefully someone has these.

edit: According to their websites, none of the electronics stores around here has either chip. I'll go to them on monday and see if their sites are wrong...

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher

Its funny, you all talk the talk.. I just grab crap from Autozone, like
them stupid light kits with the ultra brigt LED's as an example, and
get out the ol trusted sodering iron and whipp something up. I have no
clue other than dumb luck.. My wife on the other hand went to ITT and
knows all that resister stuff.

I had a light string in my case that dances and flashes to tunes played in my case, way before they were able to be bought.

I think that should be very interresting mod, make sure to update us with pictures when you get it done.

Don't worry MoneyShot, I think its only Wil5on and fraggard who are wierdo techno people :razz:

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-[Better to be Honest than Kind]-

However, building simple circuits is fairly ... simple. Even simpler is making your own video cables, better quality too (about 10-70% the cost of buying it pre-made)

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Blame it on Microsoft, God does.

Youre quite right Crono. What I'm doing here is fairly basic.

For those of you who have no idea what I'm talking about, this is what I'm trying to acheive;



I've updated, with that gif, and a price list, in case anyone else likes my idea.

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher

RaPtoR said:
Why are you casemoding an old floppy drive :O

I threw out mine years ago!

i told you wilson, it's useless... :rolleyes:

Seems kinda pointless with such a small light and an ugly drive.

Oh well, have fun.

OK the whole CYLON idea is pretty cool.. I hope your useing CYLONS as the base for the idea, and not that damn talking car. =)

They're actually different. Cylons has a dot that traced back and forth, Kit had 8 "cells" that faded in and out from each other.

...

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Blame it on Microsoft, God does.

<DIV class=quote>
<DIV class=quotetitle>? quoting Crono</DIV>
<DIV class=quotetext>They're actually different. Cylons has a dot that traced back and forth, Kit had 8 "cells" that faded in and out from each other.

...</DIV></DIV>

attempts to sound important

"Yeah, what he said"

giggles

For the record, my new case has lights all over it.. I am now considering getting a screw driver and disconnecting them.. They are getting noisome. :sad:

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The best things in life, aren't things.

why dont you put a lable printer inside ther that prints out "This
piece of paper will explode in 10 seconds*. and then actualy put some
kind of pop thingy that sais bang because that would be a total waste
of time and uterly not funny....

dont you think?

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I've bought the parts and updated my page. It turns out I was able to find a place that sells 74194s (I was the first person to ever buy one from there tho ), which makes my job easier since the 7495 wouldve required logic to drive it (I'm sure you understand Frag, 7495 only has 1 serial data input so its harder to cascade them).

If youre interested, check it out, theres pictures of electronicy stuff.

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher

you so confused me now

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I am taking a class next year on all these chips, and how to make stuff with them. Any basics I should know?

I've bought the parts and updated my page. It turns out I was
able to find a place that sells 74194s (I was the first person to ever
buy one from there tho
), which makes my job easier since the 7495 wouldve required logic to
drive it (I'm sure you understand Frag, 7495 only has 1 serial data
input so its harder to cascade them).
If youre interested, check it out, theres pictures of electronicy stuff.

Cool... /me will be waiting to see the result :smile:

I am taking a class next year on all these chips, and how to make stuff with them. Any basics I should know?

-It's really easy to accidentally mess up and connect Vcc to GND and vice-versa... don't do that.

-If you're going to do that then get pictures. :biggrin:

rs6, the most important thing you can do is pay attention in lectures, they dont sound important but actually theyre very helpful. Also dont rely on the lab supervisors since theyll just look at your circuit, say "hmm i cant see the problem" and walk away...

Or maybe thats just me...

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"If you talk at all during this lesson, you have detention. Do you understand?"

• My yr11 Economics teacher