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 Omar 980424894
• Mona Abdulla 980723631
• Nada Ahmed 980723521
• Sahar Khalid 980723832

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Presentation Outline

• Objectives.

• Methods.

• Background Theory.

• Results Discussion.

• Block Diagram.

• Project Impact.

• Flow Chart.

• Conclusion.

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Objectives

• To design a digital meter that measures the
  Bipolar Junction Transistor Forward Current
  Gain (ß).
• Easy and convenient way to measure ß
  comparing with the curve tracer.

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Background Theory
Specifications 1 mA lt IC lt 10 mA 3 V lt VCE lt 12
V 50 lt ß lt 300
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Block Diagram
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Microcontroller
Definition A small Computer, , containing the
CPU, code memory, data memory and peripheral I/O.
Characteristics of the PIC16F877

• Its a FLASH programmable device.

• Built-in Analog to Digital conversion circuitry.

• Built-in EEPROM.

• Supported by various programming languages.

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Voltage Polarity Detection
NPN
PNP
15V
15V
-15V
VCE
VCE
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Keypad Principles
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Liquid Crystal Display
The LCD is a smart device, which is used to
display the output visual information.
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Relays
Types of the Relay

• Normally Open

• Normally Closed

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Relays
Types of the Relay

• Switching Relay

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Methods
Assembly Language
PicBasic Language

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

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Methods
Important statements for LCD
LCD_OUT
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Methods
Keypad Statements
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Methods
Mathematical Operations Statements
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Methods
Mathematical Operations Statements
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Flow Chart
Results Discussion
START
Is BJT NPN OR PNP??
YES
NO
Change Polarity
Enter Values of VCE IC
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Results Discussion
Compare between IC ICQ
POSITIVE
ZERO
Decrease value of RC
EQUAL ?
NO
YES
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Results Discussion
Control RB
ZERO
Compare Between IC ICQ
Different very small ?
NO
YES
Record IC IB
Calculate B and Display it
STOP
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Results Discussion
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Results Discussion
LCD Connection
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Results Discussion
Keypad Connection
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Results Discussion
Relay Voltage Polarity Connections
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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

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Results Discussion
Design of Resistors Banks
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Results Discussion
Relays Circuit
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Results Discussion
Op-Amp Circuit

• Op Amp importance

Guarantee the acceptable voltage range to the
ADC.

• Gain of Op Amp 1

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Results Discussion
Gain of Op Amp 2
Overall Gain
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Results Discussion

• R1 3 M
• R2 1 M
• R 1 M

Gain of Op Amp 1
Gain of Op Amp 2
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Results Discussion
Overall Gain
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Results Discussion
Percentage error
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Results Discussion
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Results Discussion
Vo1
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Results Discussion
Vo2
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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.

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Results Discussion
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Results Discussion
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Results Discussion
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Results Discussion
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Results Discussion
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Results Discussion
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Results Discussion
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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.

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Conclusion
Problems Faced

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

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Any Questions..?