Bipolar junction transistor forward current gain digital meter
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Bipolar Junction Transistor Forward Current Gain Digital Meter. Group Members Amel Ahmed 980723636 Deema Omar980424894 Mona Abdulla980723631 Nada Ahmed980723521 Sahar Khalid980723832. Advisor. Dr. Jihad Mohaidat. Presentation Outline. Objectives. Methods .

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Bipolar Junction Transistor Forward Current Gain Digital Meter

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Bipolar Junction Transistor Forward Current Gain Digital Meter

Group Members

Amel Ahmed 980723636

Deema Omar980424894

Mona Abdulla980723631

Nada Ahmed980723521

Sahar Khalid980723832

Advisor

Dr. Jihad Mohaidat


Presentation Outline

Objectives.

  • Methods.

  • Background Theory.

  • Results & Discussion.

  • Block Diagram.

  • Project Impact.

  • Flow Chart.

  • Conclusion.


Objectives

  • To design a digital meter that measures the Bipolar Junction Transistor Forward Current Gain (β).

  • Easy and convenient way to measure β comparing with the curve tracer.


VCC

RB

RC

IC

VCE

IB

VBE

IE

Background Theory

Specifications

1 mA < IC < 10 mA

3 V < VCE < 12 V

50 < β < 300


Block Diagram


Microcontroller

Definition

A small Computer, , containing the CPU, code memory, data memory and peripheral I/O.

Characteristics of the PIC16F877

  • It’s a FLASH programmable device.

  • Built-in Analog to Digital conversion circuitry.

  • Built-in EEPROM.

  • Supported by various programming languages.


IC

IC

RC

RC

IB

IB

RB

RB

IE

IE

Voltage Polarity Detection

NPN

PNP

15V

-15V

15V

VCE

VCE


4×4 keypad matrix

Row connector

Column connector

Keypad Principles


1

5V

GND

2

Contrast adjustment voltage

3

Register select signal

4

Read/write select signal

5

Operation enable signal

6

Data bus

7-14

Liquid Crystal Display

The LCD is a smart device, which is used to display

the output visual information.


Relays

Types of the Relay

  • Normally Open

  • Normally Closed


Relays

Types of theRelay

  • Switching Relay


Methods

Assembly Language

PicBasic Language

  • High Level Language

  • Portable from one device to another

  • Single instruction allows you to perform a complete task


Methods

Important statements for LCD

LCD_OUT


Methods

Keypad Statements


Methods

Mathematical Operations Statements


Methods

Mathematical Operations Statements


Flow Chart

Results & Discussion

START

Is BJT NPN OR PNP??

YES

NO

Change Polarity

Enter Values of VCE & IC


Results & Discussion

Compare between IC & ICQ

POSITIVE

ZERO

Decrease value of RC

NO

EQUAL ?

YES


Results & Discussion

Control RB

ZERO

Compare Between IC & ICQ

Different very small ?

NO

YES

Record IC & IB

Calculate B and Display it

STOP


PORT A

PORT B

PORT E

PORT D

PORT C

Results & Discussion


Results & Discussion

LCD Connection


Results & Discussion

Keypad Connection


Results & Discussion

Relay & Voltage Polarity Connections


Results & Discussion

Design of Resistors Banks

Find the acceptable values of collector and base conductance that can meet the specifications.

  • Rb

  • 7 resistors

  • Rc

  • 6 resistors


Rc

Rb

Results & Discussion

Design of Resistors Banks


Results & Discussion

Relays Circuit


R2

R1

VO1

Vi1

Results & Discussion

Op-Amp Circuit

  • Op – Amp importance :

Guarantee the acceptable voltage range to the ADC.

  • Gain of Op – Amp 1:


R2

R

R1

R

VO2

Vi1

Results & Discussion

Gain of Op – Amp 2:

Overall Gain:


Results & Discussion

  • R1 = 3 M

  • R2 = 1 M

  • R = 1 M

Gain of Op – Amp 1:

Gain of Op – Amp 2:


Results & Discussion

Overall Gain:


Results & Discussion

Percentage error:


R4

R2

1M

1M

V4

V2

15V

15V

R3

R1

U1

1M

+

3M

+

OPAMP5

U2

+

V1

OPAMP5

15V

V5

V3

-15V

-15V

Results & Discussion


Results & Discussion

Vo1:


Results & Discussion

Vo2:


Results & Discussion

Basic Pro programs

  • Program 1: Keypad controlling.

  • Program 2: Liquid Crystal Display controlling.

  • Program 3: Interfacing program between Keypad & LCD.

  • Program 4: Testing Microcontroller Mathematical operation.


Results & Discussion


Results & Discussion


Results & Discussion


Results & Discussion


Results & Discussion


Results & Discussion


Results & Discussion


Project Impact

  • The project does not have any bad impact on the environment because it will not cause any damages, hazard, or pollution in the surrounding area.

  • The technology developed in this project can be used to protect the environment, for example design a microcontroller based system to monitor the pollution in the air, or oil contents in the water.


Conclusion

Problems Faced

  • Software. (Assembly Language, Basic Pro)

  • Budget. ( Not Available)

  • Components. (Lab-X1 Board)


Any Questions..?


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