Synopsis on Temperature Control Fan Speed

8/10/2019 Synopsis on Temperature Control Fan Speed

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SYNOPSIS ON

TEMPERATURE

CONTROL FANSPEED

EASYELECTRONICSEasyelectronics.weebly.com


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TEMPERATURE CONTROL FAN

SPEED REGULATOR PrototypeDescription:

This project is design for the student to make them

understand the technology used in a temperature control fan

speed regulator, which is used to control the speed of fan.

Speed of a fan is controlled according to the temperature ofthe room.


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Projects summary:

In this project we try to give the Idea of prototype of a speedregulator. We are using micro controller AT89C51 and temperature

sensor chip DS1820 for controlling the speed of a fan. There is a

steeper motor for showing the speed of the fan.


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BLOCK DIAGRAM


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BLOCK DIAGRAM DESCRIPTION

The Temperature Controlled Fan is designed around themicro-

controller. The main blocks of the system are

Micro-controller board: It is a low-power, high-performance

CMOS 8-bit microcomputer with 4K bytes of Flash Programmable

and Erasable Read Only Memory PEROM). The device ismanufactured using Atmels high-density nonvolatile memory

technology and is compatible with the MCS-51. Instruction set

and pin out. The on chip Flash allows the program memory to be

reprogrammed in-system or by a conventional nonvolatile

memory programmer. By combining a versatile 8-bit CPU withFlash on a monolithic chip, it provides a highly flexible and cost

effective solution so many embedded control applications.


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Temperature Sensor Block: The temperature sensed by using

LM 35. The output voltage of LM 35 varies in liner proportion

with the temperature. The sensitivity of LM 35 is 10 mV/0C.

For 1 0C output of LM35 is 10 mV. For 10 0C output of LM35 is

100 mV.

ADC Block: ADC means analog to digital converter. The output

of signal conditioning is in the analog form. But

Microprocessor requires input in digital form for this purpose

we have to use ADC. In this project we are using ADC 0808.

The reference voltage is +5 V. The resolution of ADC is 20 mV.

Therefore for 20 mV output of ADC is (01) H. And for 100 mV

output of ADC is (05) H.


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Amplifier Block: Output signal from micro-controller 89C51 is

weak so we have to amplify that signal. Amplifier block

amplifies the signal for driving the final control element

i.e. output device. For amplification Transistor BC 547 is used.

Output Block: In this project we are using FAN as output

device. If temperature is above set point then Fan is ON so

that temperature will start to decrease


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Display Block: In this project we are using 16 X 2 intelligent

LCD display to display the college name, temperature set point

and very important is temperature of Temperature

Controlled Fan.

Power Block: For our project we require + 5 Volt,5 Volt and+12 Volts supply. +5 Volts and. 5Volts is given to Micro-

controller board, Temperature sensor, Signal conditioning,

ADC etc. +12 Volts are used to drive the relay.


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11.Mini Switch 5

13.Diode 1n4007 4

14.IC Base 1

15.Relinate (5 pin and 2 pin) 1

16.Power chord 1

17.Capacitor 100Microfarad/ 25v 1

18.Capacitor 470 Microfarad / 25v 1

17.Power IC 7805 1

Synopsis on Temperature Control Fan Speed

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