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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. Dave thanks for another tear down, these things a priceless for these low cost instruments.
    I psted on the blog but I’ll highlight my main concern here.
    The 5volt supply, what’s going on there? What you should have done is shorted the supply out to see what happens. Does it blow the internal fuse, that’s soldered in? Yikes that would be a pain.
    I don’t like the 5v supply with no current limit, it’s a game changer. I’m seeing smoke and blown expensive chips on my breadboard.
    I like the size, it’s a triple supply, make it as small as possible that’s why I want a triple supply. the Rigol is too big for me – bench space-.


  2. Man it’s the little things. Non-standard width binding posts that don’t actually fit banana plugs properly? Fuses soldered to the board in hard-to-reach places? Who let these things through design meetings?

    The lack of hysteresis on the tap switching is not good, nor is the thermal design. I’ve seen amateurs make better supplies on youtube – and they have better user interfaces as well. I’d rather spend $500 on building my own. At least I’d have fun doing it.

  3. STM32F2 is not capable of running Linux OS.
    Maybe sort of FreeRTOS…

  4. This is a bleeding interesting post. Report register my position Homepage

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