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EEVblog #1334 – Mystery Dumpster Teardown

Mystery dumpster teardown time! With the most amazing mechanical mains power switch you’ll ever see! ...


  1. DRÄGER is a very specialized German developer of measuuring equipment (especially for medical, environmental or industrial devices)

    ..and yeah it’s expensive equipment.


  2. What is truly remarkable about the LVDC board is that it is one of the earliest known boards to make use of SMD (surface mount) packaging considering that this is circa 1960’s technology. Had anyone shown you that module without telling you what it was from and asked you to guess when it was made, what would you have guessed — 1990’s or 1980’s perhaps — but certainly not 1960’s.

  3. Hey Dave….greetings from Lübeck #2.
    I’ve learned my job at Dräger 12 years ago and work now in the testlab of an electronic company which produces the main electronic stuff for Dräger in Lübeck too.
    I’m really excited to see that Lübeck comes to your home in Australia on the other side of the world.

    Happy new year .


  4. Those 3 pin “LED”s look like the tricoloured ones I once had back in the 1990s.

  5. Early LEDs were really bad. They are extremely dim. One of the reasons for the bubble display was well, they were dim so you didn’t want to use large arrays of them or you got lots of power consumption.

    Modern LEDs are much brighter, but that’s technology – we understand the physics of why LEDs glow so much better now and we can make much purer semiconductors that waste less energy. (Quantum mechanics are involved, and a failure mode involves recombination that doesn’t produce light. Early LEDs suffered from a lot of this).

    Wow, most people drive Nixie tubes using a high-voltage driver IC chip (usually a Russian clone of a TI DM5441 or DM7441 BCD-to-decimal high-voltage decoder-driver)


    It’s a Russian clone chip, so the datasheet has the TI version and the Russian one in Cyrillic. (Most modern Nixies are Russian because they’re still producing tubes!)

  6. Noodley appendage! Ahhhahahahahahahaha!

  7. Excellent site you have here but I was wondering if youknew of any user discussion forums that cover the sametopics discussed in this article? I’d really love to be a part of online community where I can get opinions from other experienced individuals thatshare the same interest. If you have any suggestions, please let me know.Appreciate it!

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