Sleep is the regular state of natural rest observed in all human beings. Melatonin is a hormone that our body generates to help sleep. The quantity of the same varies in our body in context to the stage of our sleep. It was studied that melatonin is dependent on the ambient intensity of light. Hence varying intensities of light can be used in manipulating the sleep pattern. Nature has adapted the above process to break sleep, with increasing intensity of sunlight in the morning. A parallel process is in controlling the sleep pattern, ensuring that the transition from deep sleep to wakefulness transitions through a shallow sleep. This is important to ensure freshness upon getting up. Current day alarm clocks can by ineffective in ensuring the above condition. In our project we have proposed an idea to tackle the above issue by manipulating the sleep pattern, by varying the light intensity, to wake-up fresh. The primary aim of proposing this project is to explore the kinds of design techniques and tools followed by the people in the industry and design the same with those available with us.
[...] Wake-up Fresh Alarm Block Diagram The basic building blocks of the block diagram are described below: Pulse Rate Sensor Circuit Processing Block Alarm and clock Unit Figure 2.1 : Block Diagram of Wake-up Fresh Alarm System Light Intensity Control Circuit 2.2 COMPONENTS OF FRESH UP ALARM SYSTEM OSCILLATOR Crystal Controlled Oscillators may be considered as consisting of an amplifier and a feed back network that selects a part of the amplifier and returns it to the amplifier input. In order for the oscillator circuit to operate, two conditions must be there: Loop power gain must be equal to unity Loop phase shift must be equal to etc. [...]
[...] The output of the counter is an output pulse after every 24 input pulses; resulting in a one output pulse per day DISPLAY SELECTOR UNIT This unit takes the input for clock unit and alarm unit and displays the appropriate one depending on the user‟s requirement. An external in put switch S3 is provided in order to select anyone of this two. Usually the clock unit is displayed and when user sets the alarm, alarm unit is displayed This unit is implemented using multiplexers and flipflops. [...]
[...] Therefore the period of the clock is also varied in order to produce varying current CLOCK GENERATOR UNIT This unit contains mainly three parts i.e. the clock unit, display selector unit, and display unit. The clock unit acts as the real time clock. It provides time to user and to other units also. The display selector unit takes the input from both alarm unit and clock unit and selects which one to display depending on the user‟s option. The display unit contains multiplexing unit which multiplexes the BCD outputs in order to 8 reduce the complexity of circuit. [...]
[...] The count then increments on each clock pulse until it reaches 101. When it increments to 011 both inputs of the NAND gate go high The result is that the NAND output goes low, and resets the counter to zero. The output of the divide by 6 counter is an output pulse after every 6 input pulses. That is, we get 1 output pulse per min i.e. after 60secs. Scaling to 1 pulse per hour Circuit Next the 1 pulse per minute is converted to 1 pulse per hour. [...]
[...] Figure : Block Diagram of clock generator circuit CLOCK UNIT The following blocks are used for this unit: Clock Circuitry: A crystal of 32768 Hz is used to generate a square wave of the same frequency. There is a need to get 1 pulse per sec from the 32768 Hz square wave. For this the frequency is divided by 128 to get an output of 256Hz. This is then further divided by 256 to get an output of 1 Hz i.e. [...]
APA Style reference
For your bibliographyOnline reading
with our online readerContent validated
by our reading committee
