DIGITAL IC TESTER AND RECOGNIZER

A Mini Project Report on :

CHRIS MANOJ Prof. K. SUBBA RAO07N71A0412 Head , Dept. of E.C.E.

By : Under the esteemed guidance of :

DRK-IST. DRK-IST.

Objective

• This project intends to test a, IC under consideration, is in a working condition or not.

• This makes the task of debugging the faulty circuit easier rather than checking the circuit on the whole .

INPUTS AND OUTPUTS

• INPUTSPower SupplyIC to be Tested. Keypad Entry.

• OUTPUTSLiquid Crystal Display.

HARDWARE

• Components for a regulated power supply.• Microcontroller AT89S52.• Liquid Crystal Display.• IC to be Tested (Base).• Keypad.

Components for a Regulated Power Supply

• Transformer

• Rectifier

• Filter

• Voltage Regulator

Software Used:

• Keil Compiler : Front end

• Pro-load

Design Requirements

• Input pins to take data from IC• Output pins to display data on LCD• Logic Unit and ALU -> Control Unit• Program Memory(ROM)• RAM• Timers .To have all these in one socket we go for a microcontroller

Which Microcontroller ?

• To select a Microcontroller we have to think of the following factors :

SpeedPower ConsumptionCostEfficiency So, we go for AT89S52

Features of AT89s52• 8K Bytes of Re-programmable Flash Memory. • RAM is 256 bytes.• 4.0V to 5.5V Operating Range.• Fully Static Operation: 0 Hz to 33 MHz’s• 32 Programmable I/O Lines.• Three 16-bit Timer/Counters.• Eight Interrupt Sources.• Full Duplex UART Serial Channel.• Low-power Idle and Power-down Modes.• Interrupt recovery from power down mode.• Fast programming time.• Flexible ISP programming (byte and page mode).

PIN DIAGRAM of AT89s52

LIQUID CRYSTAL DISPLAY

LCD INTERFACE WITH MICROCONTROLLER

INTERFACING THE KEYPAD TO MICROCONTROLLER

BLOCK DIAGRAM

IC that were TESTED

• 74LS00- QUAD 2-INPUT NAND GATE

• 74LS02- QUAD 2-INPUT NOR GATE

• 74LS09 QUAD -2 INPUT AND GATE

74LS00- QUAD 2-INPUT NAND GATE

74LS02- QUAD 2-INPUT NOR GATES

74LS09 QUAD -2 INPUT AND GATE

INPUT INPUT OUTPU

T

A B AB

L L L

L H L

H L L

H H H

Function Table :

SCHEMATIC DIAGRAM

DIGITAL IC TESTER AND RECOGNIZER :

CODING PART

DUMPING THE HEX FILE INTO THE MICROCONTROLLER

FUTURE SCOPE

• The project can be extended to work for more 16 pin ICs by changing some hardware and coding.

ICs that can be tested and recognized:

• 4070- Quad 2-Input Exclusive OR Gate • 7266- Quad 2-Input Exclusive NOR Gate • 4073- Triple 3-Input AND Gate • 4075- Triple 3-Input OR Gate •4082- Dual 4 input And gate • 4052- 4 X 2 Multiplexer • 4051- 8 X 1 Multiplexer • 4053- 2x1 Multiplexer • 7485- 4 bit binary comparator • 74194- 4 bit bidirectional Shift Register

THANK YOU - CHRIS MANOJ