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

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

Presentation Outline

Objectives.

  • Methods.

  • Background Theory.

  • Results & Discussion.

  • Block Diagram.

  • Project Impact.

  • Flow Chart.

  • Conclusion.


Objectives

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.


Bipolar junction transistor forward current gain digital meter

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

Block Diagram


Bipolar junction transistor forward current gain digital meter

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.


Bipolar junction transistor forward current gain digital meter

IC

IC

RC

RC

IB

IB

RB

RB

IE

IE

Voltage Polarity Detection

NPN

PNP

15V

-15V

15V

VCE

VCE


Bipolar junction transistor forward current gain digital meter

4×4 keypad matrix

Row connector

Column connector

Keypad Principles


Bipolar junction transistor forward current gain digital meter

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.


Bipolar junction transistor forward current gain digital meter

Relays

Types of the Relay

  • Normally Open

  • Normally Closed


Bipolar junction transistor forward current gain digital meter

Relays

Types of theRelay

  • Switching Relay


Bipolar junction transistor forward current gain digital meter

Methods

Assembly Language

PicBasic Language

  • High Level Language

  • Portable from one device to another

  • Single instruction allows you to perform a complete task


Bipolar junction transistor forward current gain digital meter

Methods

Important statements for LCD

LCD_OUT


Bipolar junction transistor forward current gain digital meter

Methods

Keypad Statements


Bipolar junction transistor forward current gain digital meter

Methods

Mathematical Operations Statements


Bipolar junction transistor forward current gain digital meter

Methods

Mathematical Operations Statements


Flow chart

Flow Chart

Results & Discussion

START

Is BJT NPN OR PNP??

YES

NO

Change Polarity

Enter Values of VCE & IC


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Compare between IC & ICQ

POSITIVE

ZERO

Decrease value of RC

NO

EQUAL ?

YES


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Control RB

ZERO

Compare Between IC & ICQ

Different very small ?

NO

YES

Record IC & IB

Calculate B and Display it

STOP


Bipolar junction transistor forward current gain digital meter

PORT A

PORT B

PORT E

PORT D

PORT C

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion

LCD Connection


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Keypad Connection


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Relay & Voltage Polarity Connections


Bipolar junction transistor forward current gain digital meter

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


Bipolar junction transistor forward current gain digital meter

Rc

Rb

Results & Discussion

Design of Resistors Banks


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Relays Circuit


Bipolar junction transistor forward current gain digital meter

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:


Bipolar junction transistor forward current gain digital meter

R2

R

R1

R

VO2

Vi1

Results & Discussion

Gain of Op – Amp 2:

Overall Gain:


Bipolar junction transistor forward current gain digital meter

Results & Discussion

  • R1 = 3 M

  • R2 = 1 M

  • R = 1 M

Gain of Op – Amp 1:

Gain of Op – Amp 2:


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Overall Gain:


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Percentage error:


Bipolar junction transistor forward current gain digital meter

R4

R2

1M

1M

V4

V2

15V

15V

R3

R1

U1

1M

+

3M

+

OPAMP5

U2

+

V1

OPAMP5

15V

V5

V3

-15V

-15V

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Vo1:


Bipolar junction transistor forward current gain digital meter

Results & Discussion

Vo2:


Bipolar junction transistor forward current gain digital meter

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.


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

Results & Discussion


Bipolar junction transistor forward current gain digital meter

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.


Bipolar junction transistor forward current gain digital meter

Conclusion

Problems Faced

  • Software. (Assembly Language, Basic Pro)

  • Budget. ( Not Available)

  • Components. (Lab-X1 Board)


Bipolar junction transistor forward current gain digital meter

Any Questions..?


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