CRAFTING

From conception, we decided our final design for our device

Keychain Watch - 

Detailed sketch of our keychain model has been given below.

 

How do digital clocks work?

An oscillator is needed for any type of clock to work. In a digital clock, this is usually provided by using a crystal which is made out of glass. As an electric charge passes through the crystal, it will change shape slightly and make a very light sound. The sound which is heard at a regular frequency is then converted into an electronic signal. By using a series of counters, the oscillations from a 60 Hertz oscillator is reduced to a 1 Hertz oscillation. The first counter will count one for each set of ten oscillations, and the other one will count one for each six “tens” oscillations. This sets up the 1 Hertz signal so that it can pass seconds because the actual definition of 1 Hertz is one oscillation for each second. The six counter sets up the hours since it counts for 6 sets of 10 – or 60. Each of the counters is connected to an electronic chip that signals to the display which uses lights to display the time.

This LED or LCD light display is called a “7-segment display.” This is because there are seven segments that can light up to display a number. For instance, number 8 uses all 7 lights. But the light segments are designed to be able to light up in an array to display the numbers 0 to 9. These lights are situated on the display so that they display two sets of two-digit numbers. When the digital clock reaches 12:59 and goes to 1:00 it essentially resets or starts over. The electric components in a digital clock are designed so that they have a built-in processor which basically looks for a “13” in the hours' display. When it occurs, it resets the counter back to 1. Users can also reset the time using digital buttons that are installed on the clock in some accessible location. These buttons allow increased frequencies so that the numbers more much faster.

How do audio digital clock works?

In order to transduce and transmit audio properly, a digital audio device uses an internal clock that regulates the rate of flow—the sampling frequency—of digital 1s and 0s in its bitstream. The clock typically uses a crystal that physically vibrates when excited by an electric current. At the factory that supplies pro-audio manufacturers with these crystals, the size and shape of each are tweaked to make it oscillate at a very specific frequency. Interestingly, this frequency is way higher than what is ultimately desired for use in digital audio; a multiplier divides it to yield one of the nominal sampling frequencies used in production.

Battery/Cells for device

Battery life is another notable design challenge, current battery technology will only power a glowing smartwatch with myriad functions for a few hours. After that, it's back to the charger. As a sustainable energy replacement solar cells can be used in those clocks. Not only we will able to use eco-friendly energy system but also it will prove helpful for villagers since they have a lot of issues regarding power shutdown. It will also prove cost-effective for a longer period of time.