Just got this from China through eBay. It is for analyzing the performance of mechanical watches. It does this by listening to the sound of the movement and then interpreting the signal.
Paid $177 + $15 shipping for it. Quite impressed with the design and build quality on this thing. Even the firmware seems good
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/shocked.gif)
Anyway, here it is:
![](https://farm5.staticflickr.com/4617/39184998594_83234e254b_b.jpg)
The watch is clamped to the microphone assembly. It can be rotated in two axes for testing the watch in different positions. 5 or 6 positions is normal.
This watch runs 18.2 seconds per day fast
![Roll Eyes ::)](https://www.eevblog.com/forum/Smileys/default/rolleyes.gif)
![](https://farm5.staticflickr.com/4723/38996283085_4c390e9ac4_b.jpg)
Unexciting back of the unit. The USB calibration port is for factory use. If anyone knows anything about this, please let us know
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
![](https://farm5.staticflickr.com/4668/39895984571_0a71816ec3_b.jpg)
Inside the unit, slightly more interesting. Notice the threaded metal inserts for the screws, also for the PCB screws. Not bad.
![](https://farm5.staticflickr.com/4604/39863058262_536fbbb318_b.jpg)
Microphone assembly with preamplifier. The red wire is ground, black is +8V
![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif)
Yellow is signal.
![](https://farm5.staticflickr.com/4759/39895975321_36c815fce0_b.jpg)
A closer look at the microphone assembly. Seems adequate.
![](https://farm5.staticflickr.com/4718/39184993124_cd5683ff13_b.jpg)
Front of the PCB. The display is colour LCD, 480x272 pixels. Nice and bright.
![](https://farm5.staticflickr.com/4678/39863051082_309aaf10c3_b.jpg)
Back of the PCB. Modern design compared to other watch analyzers I have seen. Good quality as far as I can see.
![](https://farm5.staticflickr.com/4721/26022387298_6cf0c82c62_b.jpg)
Closeup of the microphone preamplifier.
![](https://farm5.staticflickr.com/4744/38996280415_69c9424c3a_b.jpg)
Closeup of the microphone itself. Seems to be a piezo element, fixed to the metal thing that sticks out of the microphone assembly. Curled wire for mechanical isolation I suppose.