Usually a watch with switching time zones is a rather intricate design. They are either digital, with a choice of belts with buttons, or mechanical with a device that allows you to rotate the entire mechanism relative to the fixed dial. There are also devices similar to sliders that allow you to calculate the time in another belt by the time in the current one. And finally, designs consisting of two or more mechanisms with dials. You don’t need to switch anything there - time in several zones is displayed simultaneously.
All this is great, but the author of Instructables under the nickname msolek offers a more elegant solution. A 12-faceted watch that can be set so that the face with the name of the selected time zone appears on top. The watch dial is made without numbers, with one division. That's all.
Manufacture homemade the wizard starts with the outline of the CD (or DVD):
He then divides the circle into 12 sectors. You can use geometric methods, for example, you can use a protractor (one sector - 30 degrees), you can - simply by attaching a dial taken from a broken watch. And you can also like this, at a 30-degree angle in the inner hole of the square:
Based on the markup made, the master cuts out the dial and marks it:
Using the ready-made dial as a template, the master marks the back wall of the future watch along it, cuts it out and makes holes in it to access the battery compartment:
Makes a 12-sided tube, which will be the watch case:
Extracts mechanism and hands from unnecessary, but working hours:
Moves the mechanism to a new case:
Opens a list of time zones (for example, on a specialized site, in the settings of a smartphone, PC, it is also in some button phones) and puts the names of cities on the verge of the case:
And now the most important thing. The master sets on the watch only the hour and second hands, but not the minute. When changing faces, it will show incomprehensibly what. Second, too, but it is needed as an indicator of the watch’s performance.You will have to determine the minutes by approximately the clockwise position between the divisions. It is not necessary to stick a sticker with the logo of the Metacafe video hosting (or any other logo) before installing the arrows.
It remains to install a battery in the watch:
And you can use it. You need to put the watch on such a line so that the name of your time zone is on top. Then set the current time in your time zone. Now, turning the clock so that the names of other time zones appear on top, you can find out the current time there.
Such a master’s watch turned out with quick switching of time zones, arranged no more complicated than ordinary watches.