Category Archives: EMSL Tests & Quizzes

Name that Ware May 2013

Mystery Ware May 2013 7Mystery Ware May 2013 8

In cooperation with Bunnie Studios, the blog of renowned hardware hacker Bunnie Huang (of Hacking the xbox and Chumby fame), we’re pleased to present an unusual “ware” that we acquired from one of our local Silicon Valley electronics surplus dealers.

(If you’re unfamiliar with the game, “Name that Ware” is a regular contest on Bunnie’s blog, where the goal is to learn about reverse engineering by analyzing unusual— or common but seldom-seen —hardware.  You can read about the contest rules here, and you can see many pictures of past entries with this google image search, or even get a calendar featuring Name that Ware entries from prior years.)

In the detail photos that follow, we’ll show some close-up photos, and provide a little more physical description (without speculating too much as to the purpose of the different features).   Can you identify this piece of hardware?

Continue reading Name that Ware May 2013

Ever seen one of these?

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whatsit-pcb - 1

From the files of TGIMBOEJ comes this piece of unusual hardware.

What does it do? Where did it come from? What does it want from us? And why is it shaped like that? An interesting little mystery.

The overall size of the object is about 1.75 inches long. The cylindrical part appears to be made of 300-series stainless steel or a similar alloy. The back side of the circuit board is flat, without any components (yep, pried it up to look).

Now, I’ve found most of the answer already, but I don’t know the manufacturer or specific application. Do you recognize it, or can you guess what it is or what it’s from?

In the pictures here, the chip markings are obscured– that would be too big of a hint. We’ll add clearer pictures tomorrow if no one gets it by then.


A couple of folks were able to piece it together from the pictures here. On twitter, Henrik Sandaker Palm (@HSPalm)
wrote, “I bet one of those chips are some sort of gyroscope or directional sensor…”

And yes, that’s quite correct. One of our anonymous commenters (and, madam or sir, please stand up and take credit!) explained how they came to the same conclusion:

    “I will guess that this is part of a precision compass based on the following reasoning.

    1. Whatever is on the board is a sensor. A screen driver or other controller would have more than a single eight wire connection, and there are no other visible interfaces. I am assuming that there are no other electronics embedded in the steel block because they looked under the board and didn’t mention any.

    1b. The fact that part numbers would be too obvious implies that at least one of the components is highly specialized. This is consistent with there being a sensor on the board, although there are many other specialized devices it could be.

    2. The board is meant to stay level. There is no good reason to have a large counterweight and flex connector on a circuit board unless it is meant to maintain the board in a level state. There is a good possibility that this was also mounted in a swivel along an orthogonal axis to provide freedom on both pitch and roll (this may be why the flex circuit is S-shaped instead of straight).

    3. The only sensor I can think of that needs to be level is a compass. The sensor could also be an accelerometer provided it was meant to be used while the device was stationary to measure the force of gravity, because movement would cause the board to shift and invalidate the readings. There does not appear to be any encoder components that could take the rotation into account.

    4. This is probably a precision instrument because the counterweight appears to be fully machined instead of cast, which implies it is part of an expensive device manufactured in low quantities.”

Correct on all counts. The particular shape and size of the flex-circuit connector indicates that the assembly is free to rotate a small amount not only in one axis, but in two, as though it were mounted as a compass in a gimbal (like so), with a weight to keep the circuit board level.

Here’s another picture, now with the flex-cable disconnected, and the chips visible:

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Besides the obvious point– that the board is labeled “compass” under there, the second chip from the right is an HMC1052 two-axis compass chip. That’s not so very different from the HMC5843 that we demonstrated in this project.

The remaining mystery is this: exactly what did it come out of?

It would be nice if the manufacturer labeled what it came from. But, we can narrow it down a little bit. As the commenter noted, the machined stainless suggests that it’s part of “an expensive device manufactured in low quantities.” Add to that, (1) a custom flex cable is used rather than just a longer wisp of off-the-shelf flex cable or plain thin wires and (2) the circuit board and stainless are carefully machined so that the board can only fit in one way. Custom flex cables are expensive in low quantity. Engineering parts such that things can only fit together one way is usually done for reasons of precision in mass production. Together these suggest that perhaps it came from something (yes) expensive, but mass produced none the less. The fact that it’s in a gimbal mount suggests that whatever it was originally in moved, for example in a vehicle. The fact that it relies on a weight to operate suggest that it wasn’t designed to operate in zero-g, leaving “only” air, sea, and land vehicles as possible suspects. If you can come up with any other evidence or things to check that might help identify what it might be, we’d love to hear about it in the comments.

What it is


It’s time to reveal the mystery tool!

Wow– we’ve had some great answers– and some great restraint from those of you who already recognize it.

Thanks to everyone who participated!

Here are some of the guesses that were entered as comments– it’s a great list, and worth a read. My real surprise on this list: four guesses were that it was a piece of a time machine.

  • Scoop for lifting boiled eggs out of water. (X5)
  • Time Machine or part thereof (X4– WTF?)
  • Golf ball retriever (X3)
  • Eggcup (X2)
  • Egg dipper for coloring Easter eggs (X2)
  • Yolk separator (X3 — might work; kinda sharp.)
  • Candle Snuffer (X2 — probably won’t work.)
  • Antenna for communicating with intelligent aliens. (X2)
  • A spiral (Yup.)
  • Cocktail stirrer or Cocktail whisk
  • Mayo whip
  • Egg Beater
  • Frothing whip for an espresso set.
  • Heat sink for pouring hot water into glass (Does such exist?)
  • Potato Masher
  • Futon tataki, for beating the dust out of futons
  • Magic wand for putting the magic smoke back into blown components! (Nice!)
  • Magic wand – other (X2)
  • Eggpoacher
  • Hair ornament
  • Implement to politely push away public huggers
  • Ectoplasm handler
  • Sproingy Springtime hamsterlift
  • Barbeque tool
  • Rejected design for a supppository.
  • Manufacturing tool to keep two materials separate.
  • An “Infinite Speculum.”
  • “I’m not at liberty to say.”
  • Golden Ratio Bubble Wand! (Neat idea!)
  • Instrument used to keep eyes open whilst driving. (Ow!)
  • Fancy urethral sound
  • A bismuth crystal scoop.
  • IUD
  • Cone stand from an ice cream shop.
  • Thalidomide baby contact-lens application tool. (High points for originality.)
  • High quality nose picker.

To this list let me add my own “guesses”:

  • Professional level egg-in-spoon-race spoon.
  • Lollipop for robots.
  • Support armature for world’s largest lollipop.
  • Advanced nose-hanging spoon.
  • Dieter’s ice cream scoop.
  • Traditional umbrella for use during Festivus.

The tool is so simply and beautifully constructed that it is very difficult to judge the overall scale of the object. Is it three inches or three feet long? Of course, it turns out to be pretty small.

Nine answers assumed that the tool was the right size to hold an egg. And it sure is– a robin egg. ;)

You could indeed balance a chicken egg in the spiral, but it would be unsteady. The most popular answer was a tool for lifting boiled eggs out of water. Even for robin eggs, that would be difficult because (1) there’s very little angle between the spiral and the handle, and (2) the handle is very short. It might work as a golf ball retriever if the water trap is no deeper than your Beta bowl and you don’t mind turning the bowl upside down to get the ball out.

Honorable Mentions: The tool would be very good as a…

  • Tea bag remover thingy
  • Olive spoon for getting olives out of jars.

But of course, as one person answered, it’s a tool…

Continue reading What it is

Quiz: Do you know your fungi?

A mushroom is not a mush, nor is it a room. It is a fungus.

A toadstool is not a toad, and it is not a stool. It is a fungus.

And as Matt Groening informed us in his wonderful book School Is Hell (he knew: he went to the same school that I did), a fish stick is not a fish, nor is it a stick. It is a fungus.

Now, in the spirit of the quizzes that once appeared on the Brunching Shuttlecocks, we here present a list of twenty things that may or may not be fungi. Can you sort them out?
Continue reading Quiz: Do you know your fungi?