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JustDenDimi

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  1. Informative
    JustDenDimi got a reaction from Razor Blade in VPNFilter malware - Cisco's Talos finds new network gear vulnerability   
    VPNFilter malware - Cisco's Talos finds new network gear vulnerability
     

     
    Cisco's Talos Intelligence group shares their findings about a new multi-stage malware they found on network devices in a blogpost. The post summarises the different stages of the malware, manner of infection, malware activity, and how to protect your devices (if possible) against the threat.
    The below information can also be found on the blogpost itself: https://blog.talosintelligence.com/2018/05/VPNFilter.html
     
    Brief Technical Rundown
    Stage 1
    Stage 2
    Stage 3
     
    Defending agains the threat
     
    Update #1
    The FBI released a Public Service Announcement regarding the VPNFilter malware. https://www.ic3.gov/media/2018/180525.aspx
  2. Informative
    JustDenDimi got a reaction from kingfurykiller in VPNFilter malware - Cisco's Talos finds new network gear vulnerability   
    VPNFilter malware - Cisco's Talos finds new network gear vulnerability
     

     
    Cisco's Talos Intelligence group shares their findings about a new multi-stage malware they found on network devices in a blogpost. The post summarises the different stages of the malware, manner of infection, malware activity, and how to protect your devices (if possible) against the threat.
    The below information can also be found on the blogpost itself: https://blog.talosintelligence.com/2018/05/VPNFilter.html
     
    Brief Technical Rundown
    Stage 1
    Stage 2
    Stage 3
     
    Defending agains the threat
     
    Update #1
    The FBI released a Public Service Announcement regarding the VPNFilter malware. https://www.ic3.gov/media/2018/180525.aspx
  3. Informative
    JustDenDimi got a reaction from Taf the Ghost in VPNFilter malware - Cisco's Talos finds new network gear vulnerability   
    VPNFilter malware - Cisco's Talos finds new network gear vulnerability
     

     
    Cisco's Talos Intelligence group shares their findings about a new multi-stage malware they found on network devices in a blogpost. The post summarises the different stages of the malware, manner of infection, malware activity, and how to protect your devices (if possible) against the threat.
    The below information can also be found on the blogpost itself: https://blog.talosintelligence.com/2018/05/VPNFilter.html
     
    Brief Technical Rundown
    Stage 1
    Stage 2
    Stage 3
     
    Defending agains the threat
     
    Update #1
    The FBI released a Public Service Announcement regarding the VPNFilter malware. https://www.ic3.gov/media/2018/180525.aspx
  4. Like
    JustDenDimi got a reaction from Lurick in VPNFilter malware - Cisco's Talos finds new network gear vulnerability   
    VPNFilter malware - Cisco's Talos finds new network gear vulnerability
     

     
    Cisco's Talos Intelligence group shares their findings about a new multi-stage malware they found on network devices in a blogpost. The post summarises the different stages of the malware, manner of infection, malware activity, and how to protect your devices (if possible) against the threat.
    The below information can also be found on the blogpost itself: https://blog.talosintelligence.com/2018/05/VPNFilter.html
     
    Brief Technical Rundown
    Stage 1
    Stage 2
    Stage 3
     
    Defending agains the threat
     
    Update #1
    The FBI released a Public Service Announcement regarding the VPNFilter malware. https://www.ic3.gov/media/2018/180525.aspx
  5. Informative
    JustDenDimi reacted to mariushm in Dimming LED strips with Resistor vs PWM   
    Here's some led basics.
     
    A LED doesn't work at a specific voltage, it's a current driven device. However, there is the notion of Forward Voltage , which very simplified means the minimum voltage from which the led will be guaranteed to be completely turned on and produce light.
     
    So basically this means that the LED has three regions of operation :
     
    1. Circuit voltage is below the forward voltage of a LED (I'll say Vf from now on), where it's like the LED isn't there in the circuit, it blocks the current flow completely
    2. Circuit voltage is within a very narrow region near the forward voltage of the LED, let's say Vf - 0.1..0.2v  of the LED. In this region, the LED starts to produce some light but acts like a resistor, limiting the current flow.
    3. Circuit voltage is above the forward voltage of the LED, which means the LED is fully open and produces light.... BUT, if you don't limit the amount of current flowing through the LED, eventually the LED heats up and burns out.
     
    You can't rely on that very narrow region to limit the amount of current going through the LED because it varies from LED to LED due to manufacturing process and also varies due to other factors, like how warm the LED is. That region drifts with the temperature significantly. For example, a white or blue LED could have a forward voltage of 3.0v and could start to light up from around 2.8v when it's around 20-40 degrees Celsius, but could start to light up from around 2.6v if it's warm at around 60-70 degrees Celsius.
     
    So what you normally want is to determine a voltage that's guaranteed to be slightly above the forward voltage, so that if you take 10 random LEDs out of a bag, you know all those LEDs are guaranteed to be fully open and letting current flow go through.  In my example above, I would go with 3.2v and then I have to figure out a way to limit the current going through the LED or through a strip of LEDs.
     
    The easiest method is the resistor and you have the simple formula Ohm's Law which says  Voltage equals current x resistance.
     
    So let's say we have this circuit 
     
    [ power supply  +12 v ] ------- [ resistor ] ------- [ led 1 ] ---- [ led 2 ] ----[ led 3 ] ----- [ power supply GND ]
     
    I know I want the LEDs to receive at least 3.2v in order to make sure they all are fully open and letting current flow, that they're not in that narrow region I said at [2.]
    So the 3 LEDs would have in total 3 x 3.2v = 9.6v  which means I have to make disappear the difference between 12v and 9.6v on the resistor.
    Let's put the numbers in the formula
     
    12v - 9.6v  =  Current x Resistance  , or  2.4v = Current x Resistance
     
    If you have a resistor value, then you can figure out the maximum current that would go through the LEDs, by simply rewriting Current = 2.4 / Resistance. With your 1000 ohm resistor, that would be Current = 2.4 / 1000  = 0.0024 A or 2.4 mA per LED.
    If you want to configure the maximum current to flow through the LEDs, then you rewrite the formula to Resistance = 2.4 / Current. So for example, for 10mA through LEDs, you do Current = 2.4 / 0.01 A = 240 ohm
     
    The only other thing you need to be aware of is how much heat is produced in the resistor, the formula is Power  = Current2 x R , so for example for 10mA and 240 ohm resistor, we have P = 0.0001 x 240 = 0.024w which means we can use a plain simple 0.1w surface mount resistor, or a 0.125w axial resistor and we're sure it won't overheat.
     
    Now, the resistor configures the maximum current flow, so that's the maximum amount of brightness the LEDs would be at. If you want to adjust the brightness, you'd have to change the resistor or use PWM.
    The resistor is simply a safety limit, sets the maximum, it's hard to change.
     
    PWM turns on and off the LEDs a few thousands time a second, and by adjusting the amount of time the LEDs stay on versus amount of time the LEDs stay off, you perceive a different amount of brightness. Note that it's not linear, meaning at 10% PWM you won't see the light as only 10% as bright compared to when you're not using PWM. The human eyes don't work like that.
     
     
     
  6. Agree
    JustDenDimi reacted to Canada EH in Power supply help   
    Better to go higher 550W or 600W if the price difference is small, but dont skimp on quality neither, check out the psu tier list and aim for tier 3 or 2 or 1
  7. Informative
    JustDenDimi got a reaction from RandomGuy13 in Dimming LED strips with Resistor vs PWM   
    I'm only in my first year of electronics in college so take what I say with a few grains of salt.
    As far as I'm aware running less voltage trough your LEDs won't damage them, only a higher voltage would be a problem.
    And if the resistor does get hot, you can replace it with 2 2K resistors in parallel to spread the load. I've been told this is being done in quite a few circuits.
  8. Informative
    JustDenDimi got a reaction from MandicReally in Dimming LED strips with Resistor vs PWM   
    I'm only in my first year of electronics in college so take what I say with a few grains of salt.
    As far as I'm aware running less voltage trough your LEDs won't damage them, only a higher voltage would be a problem.
    And if the resistor does get hot, you can replace it with 2 2K resistors in parallel to spread the load. I've been told this is being done in quite a few circuits.
  9. Agree
    JustDenDimi reacted to Airdragonz in Power supply help   
    500w will be safer. Also allows some headroom for oc and power fluctuations. 
  10. Agree
    JustDenDimi reacted to mikat in Do Pro FPS Players use Stereo or Surround Sound?   
    most people on reddit seem to agree that CS:GO pros mostly use stereo (at events they use in ear headphones (no surround) with noise cancelling ones overtop to block the sound)
     
  11. Agree
    JustDenDimi reacted to Mira Yurizaki in Laptop vs Desktop   
    1. Assuming MSRP prices, you can build a desktop with peripherals for much less.
    2. Nothing's been announced, so as far as we know, it can be at GDC or whatever, or it can be next year. And while you can probably upgrade the GPU in the laptop, it's more than likely using MXM modules, which are a crap-ton more expensive. Imagine having to pay the inflated prices of video cards on the market now all the time. And you usually have to rely on eBay, because very few (if any) officially source them. So it's usually almost never worth it to upgrade a laptop GPU if it can be upgraded unless the laptop is really old and the MXM modules have fallen out of demand.
  12. Agree
    JustDenDimi reacted to Genericplane in used GPUs   
    depends on the gpu. if you go for a 1060/1070/1070TI/1080/1080TI those cards a relatively new so they cant have been used for long. side note: if the card was used by miners its probably f*ed.
  13. Agree
    JustDenDimi reacted to lookpuppy in Dust removal   
    No, buy a compressed air can froma hardware store, or some place like walmart, and if you want to save moeny ask and see if any family members have an air compressor you can use. Also some gas stations have a air compressor you can use for about ¢50.
  14. Like
    JustDenDimi got a reaction from lookpuppy in Dust removal   
    No, if anything the dust would go deeper into the heatsink. But I expect the fans to not have enough power to move the dust that's stuck in there. I would suggest using a compressor or a can of compressed air and blow the dust out in the opposite direction the fans blow air into the card.
  15. Like
    JustDenDimi got a reaction from maartendc in Positive story: Pleased with Apple support on Macbook pro   
    Same here, I bought a second hand Macbook Pro (also the early or late 2014 edition) and it still had a few months of apple care. After owning it a few months the charger suddenly stopped working. So I brought it to a certified Apple re-seller or whatever you call them, and they gave me a new charger.
  16. Like
    JustDenDimi got a reaction from lookpuppy in Blocked loading of file 'C:\Windows\System32\uxtheme.dll'   
    I recognize this, I used to get this in PUBG when trying to launch it with custom shaders. It was battle eye detecting this as some kind of cheat injecting into the game. They fixed it with an update though.
  17. Agree
    JustDenDimi reacted to userzero in Plugging and unplugging headphones makes them not work   
    Check your playback devices by right clicking your sound icon and see what device it is using when playing sound.
  18. Agree
    JustDenDimi reacted to Morgan MLGman in Will a light overclock decrease the life of the card   
    Not in any meaningful way, if done properly.
  19. Agree
    JustDenDimi reacted to TVwazhere in Upgrading from i5 to i7 for fps in csgo   
    An overclockable CPU on a non overclockable chipset.... My oh my
  20. Funny
    JustDenDimi reacted to FrowningHippo in which is better?   
    We need benchmarks. I mean, I found some. But they are from a Dutch website and I can't be bothered to read them all through. I am watching anime.
  21. Informative
    JustDenDimi got a reaction from FrowningHippo in which is better?   
    If you're actually comparing a normal 1080 vs a 1080ti, the ti will perform better, but if you're just talking about build quality and what not, EVGA is should be better.
  22. Like
    JustDenDimi reacted to maartendc in Positive story: Pleased with Apple support on Macbook pro   
    Hi everyone,
     
    Thought I'd share a positive story for once, since people only ever post their negative complaints or questions. The Apple service I've had on my Macbook Pro so far has been excellent. This is the first Mac I have ever owned, so not a fanboy or anything. I previously owned a Dell laptop and several gaming desktops (still do).
     
    I bought the machine, a 15 inch Retina Macbook Pro early 2014 brand new. Got Applecare 3 year warranty with it for about $300 I think, just in case.
     
    In early 2017, just before my Applecare was going to expire, I experienced random reboots, and the keyboard was acting up. Brought it to the apple store, and they replaced the whole bottom assembly, including motherboard, battery, keyboard, etc. So I had a brand new battery in a 3 year old laptop at that point with no wear on it, pretty great! This would have been a $600+ repair, so the Applecare was worth it.
     
    Now, early 2018, laptop is 4 years old that this point, and the anti-reflective coating on the screen is starting to exhibit "spots". This is a known problem apparently, it had been getting worse lately and started to bother me. So I take it to the Apple store, and again, they will repair it free of charge because it is a known defect, even though I am out of warranty at this point. This would have been a $700 repair.
     
    So all things considered, pretty pleased with the fact that Apple actually stands by their products. If this were a Dell laptop, they'd tell me to buy a new one already. I think I will be sticking with Apple in the future.
     
    Thanks for reading!
    Cheers!
  23. Agree
    JustDenDimi got a reaction from MrDrWho13 in Always have the right connectors in your PSU!   
    Yeah you better don't mess with those things, even if your cables are able to run the things you want, there's a big chance the internal components just won't hold up and in a worst case scenario just start burning.
  24. Agree
    JustDenDimi reacted to emosun in Always have the right connectors in your PSU!   
    To anyone reading this....

    FOR GOD SAKES just buy a better power supply.
     
    they don't cost much , you can get great power supplies WITH WARRANTIES with the proper amperage and connectors on them. 

    Don't create some frakenstien abomination just because you don't want to spend the 60$ on a proper unit. If your power supply doesn't have the right pci-e connectors it's probably a junk power supply or very old.
     
    just get a proper unit. safer/better all around.
  25. Agree
    JustDenDimi reacted to emosun in 5yr old external HDD doesn't want to copy big files even though there is 380 gigs of space left, borks USB ports   
    huh?
    Something like that? figure out what it said first so we can know what the problem was.

    If the file was in fact too big then make sure the drive file system it's formatted in can handle files that large. 
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