thermoelectric cooler2

THERMOELECRIC COOLER

Project Presentation

Under The Guidance OfMohammad Akram

Presented By : Sk Ajharuddin : Faizan Ahmad

Outlines• Selection of components• Flowchart of working• Programing based on flow chart• Simulation of design• PCB designing and manufacturing

• Mounting the components• Testing of prototype• Conclusion• References

Selection of Components

MICRO-CONTROLLER

DISPLAY

TEMCLOSED BOX

Temperature sensor

BUTTONARRAY

INDICATOR

SWITCH

MOSFET

LCD

Micro controller

BUTTONSARRAY

TEM

HEAT SINK

FAN

INDICATORS

RESISTORS

CONNECTOR

TEMPERATURESENSOR

THERMO-ELECTRIC MODULE (TEM)

• The peltier module TEC1-12706 specifications:

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A=40mm B=40mm C=3.9mm

HEAT SINK & COOLER FAN

In electronic systems, a heat sink is a passive heat exchanger that cools a device by dissipating heat into the surrounding medium.

Temperature sensor• The LM35 series are precision integrated-

circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature.

Micro controller• Atmega8L is a low-power, high-performance

CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory.

Features:

• 8K Bytes of In-System Programmable (ISP) Flash Memory

• 4.0V to 5.5V Operating Range• Fully Static Operation: 0 Hz to 33 MHz• 256 x 8-bit Internal RAM• 32 Programmable I/O Lines• Three 16-bit Timer/Counters• Eight Interrupt Sources

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• Interrupt Recovery from Power-down Mode• Dual Data Pointer• Power-off Flag• Fast Programming Time• Flexible ISP Programming (Byte and Page

Mode)• Green (Pb/Halide-free) Packaging Option

Buttons Button is a simple switch mechanism for controlling some aspect of a machine or a process. 

Indicators

• LEDs are monochromatic (one color) devices.

• The colour of LED depends on the band gap.

• It works on the principle of ELECTRO LUMINISENCE.

MOSFET switch

FEATURES:• Dynamic dV/dt Rating• 175 °C Operating Temperature• Fast Switching• Ease of Paralleling• Simple Drive Requirements• Compliant to RoHS Directive 2002/95/EC

LCD DISPLAY

LIQUID CRYSTAL DISPLAY (LCD)

It’s a 16 Character x 2 Line LCD Module to the Parallel Port device.

Advantages:

• Very compact and light• Low power consumption• No geometric distortion• Little or no flicker depending on backlight

technology• Not affected by screen burn-in• No high voltage or other hazards present during

repair/service• Can be made in almost any size or shape

Resistors

• A resistor is a device found in circuits that has a certain amount of resistance

• used to adjust the current flowing through a particular part of the circuit.

Crystal Oscillators

• A crystal oscillator is an electronic circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.

SWITCHED MODE POWER SUPPLY

A switched-mode power supply (SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently.

Flow chart

Programming

Programming or burning a microcontroller means to transfer the program from the compiler to the memory of the microcontroller.

Compiler • A compiler is software which provides an

environment to write, test and debug a program for the microcontroller.

• MicroC pro, Keil Vision, etc. are compilers.

• Once a program is transferred or written in the memory of the microcontroller, it then works in accordance with the program.

Simulation of design

• Simulation is the process of analyzing the working of any circuit without physically connecting the components.

• It is done in virtual environment(with software).

• Proteus is a simulation and PCB designing software.

PCB Designing

PCB MANUFACTURING

Base material cutting Drilling Through hole plating Layer film generation Solder resist film generation Legend printing film (optional) Laminating Exposing Spray developing Etching process Solder resist masking Legend printing (optional)

Component Mounting

GOAL STATEMENT

Our team will pay acute attention to detail and complete an honest assessment of risks, failures and hazards associated with this project. The whole team will be educated on all safety precautions and must pass a safety test before assembly and testing begins.