Metku.net

MetkuMods
It is currently 22.08.2018 03:05

All times are UTC + 2 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: 24.04.2005 23:18 
Offline
Junior Modder
Junior Modder

Joined: 02.10.2004 06:53
Posts: 15
K, I built a LED circuit to go with the HDD activity. It worked fine when all was said and done. then one day when i changed my ram it stopped working. Maybe I hit something, prolly wasnt the ram, but nevertheless only 1 LED would light up and it would not sequence. So I've managed to fry 1 motherboard and my circuit since then. But yeah, now i'm trying to get it to work again, this time being extra careful. anyways. as far as I know everything is hooked up how it should be. But the sequence doesnt follow HDD activity. It just goes in sequence at full speed at all times. When I take out the HDD leads from the motherboard the LEDs go out. I dont get it!!! I've looked at it over and over again, I've replaced all the chips and resistors and capacitors and everything that could possibly of burnt out.

Any idea what could be the problem?


Top
 Profile  
 
 Post subject:
PostPosted: 24.04.2005 23:46 
Offline
Junior Modder
Junior Modder

Joined: 02.10.2004 06:53
Posts: 15
K i tested my HDD activity mobo leads on a seperate LED and they work fine. So that is not the problem.


Top
 Profile  
 
 Post subject:
PostPosted: 25.04.2005 07:22 
Offline
Site Admin
Site Admin
User avatar

Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
"When I take out the HDD leads from the motherboard the LEDs go out." And you are 100% sure that this happens? I'm just asking because the 4017 gets its power from the PSU alone so there should be always one led lit even if the circuit is not connected to the motherboard. Motherboard just provides the "clock signal" to the 4017 to count forward.

_________________
Metku | AlltheMods | LedCalc | Teknolelu | AndroidCoding
Main Computer: Intel i5, MSI H55M-ED55, 12 Gigabytes of DDR3, 3 Terabytes of HDD, GTX295 and Benq 27"


Top
 Profile  
 
 Post subject:
PostPosted: 26.04.2005 05:58 
Offline
Junior Modder
Junior Modder

Joined: 02.10.2004 06:53
Posts: 15
yano i cant remember. i thought for a second 1 stayed on...but for some reason it is in the back of my mind that they didnt. but i got sick of it and just made my "Y" formation of LEDS just go off the 555 timer alone, and made each LED at the end of the lines go with the HDD activity. The Y LEDs are amber and the ones on the end are red. it looks pretty sweet. My custom flux capacitor/helicopter landing pad haha.

but yeah if you still have any ideas of what it could have been, i'm all ears.


Top
 Profile  
 
 Post subject:
PostPosted: 26.04.2005 10:50 
Offline
Site Admin
Site Admin
User avatar

Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
There can be tons of stuff wrong and the fact that you don't remember exactly how the circuit behaved makes it even more difficult the guess anything. Check, check and recheck and it should be fine. On the other hand, there is a possibility that either the 555 or 4017 is burnt and the circuit isn't working. That is why you should build it again with different chips.

I'm not sure if it were you who I talked with about the usage of transistor to run multiple leds. As the 4017 can't provide enough current to even a single superbright led, it is always necessary to use NPN-transistors on each output pin of 4017 if you have multiple leds.

_________________
Metku | AlltheMods | LedCalc | Teknolelu | AndroidCoding
Main Computer: Intel i5, MSI H55M-ED55, 12 Gigabytes of DDR3, 3 Terabytes of HDD, GTX295 and Benq 27"


Top
 Profile  
 
 Post subject:
PostPosted: 27.04.2005 01:59 
Offline
Junior Modder
Junior Modder

Joined: 02.10.2004 06:53
Posts: 15
yeah i tried replacing the chips again and again. didnt do anything (except after i fried the one set).

and yeah you did tell me to use transistors but i dont think i really have any need for them. i have some but i dont know how to make them work so i just gave up. they are bright enough for me without using transistors. enough to brighten up my ceiling a tad bit in low lighting.

but yeah i could try rebuilding the circuit on another breadboard and see if i get different results,but i just dont have the time to do that at this point in my life. work consumes me. and i'd rather be gaming.

thanks for the advice though.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC + 2 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group