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Bipolar Junction Transistor Forward Current Gain Digital Meter. Group Members Amel Ahmed 980723636 Deema Omar 980424894 Mona Abdulla 980723631 Nada Ahmed 980723521 Sahar Khalid 980723832. Advisor. Dr. Jihad Mohaidat . Presentation Outline. Objectives. Methods .

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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 Omar 980424894

Mona Abdulla 980723631

Nada Ahmed 980723521

Sahar Khalid 980723832

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.
slide4
VCC

RB

RC

IC

VCE

IB

VBE

IE

Background Theory

Specifications

1 mA < IC < 10 mA

3 V < VCE < 12 V

50 < β < 300

slide6
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.
slide7
IC

IC

RC

RC

IB

IB

RB

RB

IE

IE

Voltage Polarity Detection

NPN

PNP

15V

-15V

15V

VCE

VCE

slide8
4×4 keypad matrix

Row connector

Column connector

Keypad Principles

slide9
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.

slide10
Relays

Types of the Relay

  • Normally Open
  • Normally Closed
slide11
Relays

Types of theRelay

  • Switching Relay
slide12
Methods

Assembly Language

PicBasic Language

  • High Level Language
  • Portable from one device to another
  • Single instruction allows you to perform a complete task
slide13
Methods

Important statements for LCD

LCD_OUT

slide14
Methods

Keypad Statements

slide15
Methods

Mathematical Operations Statements

slide16
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

slide18
Results & Discussion

Compare between IC & ICQ

POSITIVE

ZERO

Decrease value of RC

NO

EQUAL ?

YES

slide19
Results & Discussion

Control RB

ZERO

Compare Between IC & ICQ

Different very small ?

NO

YES

Record IC & IB

Calculate B and Display it

STOP

slide20
PORT A

PORT B

PORT E

PORT D

PORT C

Results & Discussion

slide21
Results & Discussion

LCD Connection

slide22
Results & Discussion

Keypad Connection

slide23
Results & Discussion

Relay & Voltage Polarity Connections

slide24
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
slide25
Rc

Rb

Results & Discussion

Design of Resistors Banks

slide26
Results & Discussion

Relays Circuit

slide27
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:
slide28
R2

R

R1

R

VO2

Vi1

Results & Discussion

Gain of Op – Amp 2:

Overall Gain:

slide29
Results & Discussion
  • R1 = 3 M
  • R2 = 1 M
  • R = 1 M

Gain of Op – Amp 1:

Gain of Op – Amp 2:

slide31
Results & Discussion

Percentage error:

slide32
R4

R2

1M

1M

V4

V2

15V

15V

R3

R1

U1

1M

+

3M

+

OPAMP5

U2

+

V1

OPAMP5

15V

V5

V3

-15V

-15V

Results & Discussion

slide35
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.
slide43
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.
slide44
Conclusion

Problems Faced

  • Software. (Assembly Language, Basic Pro)
  • Budget. ( Not Available)
  • Components. (Lab-X1 Board)
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