This is a secondary account that sees the most usage. My first account is listed below. The main will have a list of all the accounts that I use.

henfredemars@lemmy.world

Garbage: Purple quickly jumps candle over whispering galaxy banana chair flute rocks.

  • 5 Posts
  • 637 Comments
Joined 3 years ago
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Cake day: July 4th, 2023

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  • They don’t need to run failure studies. That basic characterization work is mostly already done for you. Component vendors (should) publish tables of mean time between failure for the components you’re buying that can be used to get a rough estimation with just a few minutes of effort. Typically it’s indexed by temperature, like for caps, but depends on the part.

    Now, does the bottom of the market actually use those tables? I can’t say for sure. I know one high power headlamp company does this for their LED drivers to balance lifetime with output, but I can’t know for sure what every business does.


  • The LED bulb itself is not typically the reason that these fail. There’s also complex regulation circuitry which consists of far more complex components than a single LED. Electrolytic capacitors and driver circuits can have shorter lifetimes than the actual bulb.

    With that said, manufacturers know this, so they also tend to overdrive lower cost LEDs to bring the failure rates in line with the rest of the circuit. This sounds like this may be what has happened to you just based on the dimming, but without knowing exactly how they have wired it up, it’s difficult to be sure.


  • These practices are exactly the kinds of behaviors that regulators should prevent.

    When a business gets huge it shouldn’t be allowed to buy up all of its competition. Regulatory authorities should block these acquisitions. For example, Sprint should never have been sold because it concentrated power even further and gives customers less choice.

    It’s not simple price competition either. A company like Walmart can afford to sell products at a loss to drive other businesses out on purpose and then jack up the prices when they’re the only game in town. Dollar General has been accused of strategically placing stores to block businesses from making a profit.










  • An unmanaged switch is a simple, zero-configuration network device that connects multiple Ethernet devices together. This is by far the most common type of switch because they’re cheaper to make and satisfy most needs in the home and small office. There are no settings to configure, and the device generally avoids inspecting the traffic it switches. Unmanaged switches are commodity products that are all pretty much same, varying only in the number of ports and speeds provided. These are made in large volumes.

    Managed switches add a central processor (CPU) for device administration. This design enables configuration settings which is usually an important precursor to have features such as VLANs, QoS, IGMP snooping, and port security. Businesses need managed switches to implement security policies. In addition to the added hardware, businesses have deep pockets, and managed switches are no longer simple commodities because comparing the advanced feature set and software is no longer trivial. Professional managed switches can cost thousands.

    Only recently have we seen pro-sumer switches occupy the space in between these two options by offering some managed features (VLANs) while reserving necessary enterprise features (port security, DHCP snooping, reporting) to segment the market. I bought one for $25 the other day which is almost the same as an unmanaged switch. I would no longer recommend buying an unmanaged switch to anyone with even a passing interest in home networking.