Title: Bipolar Junction Transistor Forward Current Gain Digital Meter
1Bipolar Junction Transistor Forward Current Gain
Digital Meter
- Group Members
- Amel Ahmed 980723636
- Deema Omar 980424894
- Mona Abdulla 980723631
- Nada Ahmed 980723521
- Sahar Khalid 980723832
2Presentation Outline
3Objectives
- 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.
4Background Theory
Specifications 1 mA lt IC lt 10 mA 3 V lt VCE lt 12
V 50 lt ß lt 300
5Block Diagram
6Microcontroller
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.
- Supported by various programming languages.
7Voltage Polarity Detection
NPN
PNP
15V
15V
-15V
VCE
VCE
8Keypad Principles
9Liquid Crystal Display
The LCD is a smart device, which is used to
display the output visual information.
10Relays
Types of the Relay
11Relays
Types of the Relay
12Methods
Assembly Language
PicBasic Language
- High Level Language
- Portable from one device to another
- Single instruction allows you to perform a
complete task
13Methods
Important statements for LCD
LCD_OUT
14Methods
Keypad Statements
15Methods
Mathematical Operations Statements
16Methods
Mathematical Operations Statements
17Flow Chart
Results Discussion
START
Is BJT NPN OR PNP??
YES
NO
Change Polarity
Enter Values of VCE IC
18Results Discussion
Compare between IC ICQ
POSITIVE
ZERO
Decrease value of RC
EQUAL ?
NO
YES
19Results Discussion
Control RB
ZERO
Compare Between IC ICQ
Different very small ?
NO
YES
Record IC IB
Calculate B and Display it
STOP
20Results Discussion
21Results Discussion
LCD Connection
22Results Discussion
Keypad Connection
23Results Discussion
Relay Voltage Polarity Connections
24Results Discussion
Design of Resistors Banks
Find the acceptable values of collector and base
conductance that can meet the specifications.
25Results Discussion
Design of Resistors Banks
26Results Discussion
Relays Circuit
27Results Discussion
Op-Amp Circuit
Guarantee the acceptable voltage range to the
ADC.
28Results Discussion
Gain of Op Amp 2
Overall Gain
29Results Discussion
Gain of Op Amp 1
Gain of Op Amp 2
30Results Discussion
Overall Gain
31Results Discussion
Percentage error
32Results Discussion
33Results Discussion
Vo1
34Results Discussion
Vo2
35Results 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.
36Results Discussion
37Results Discussion
38Results Discussion
39Results Discussion
40Results Discussion
41Results Discussion
42Results Discussion
43Project 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.
44Conclusion
Problems Faced
- Software. (Assembly Language, Basic Pro)
- Budget. ( Not Available)
- Components. (Lab-X1 Board)
45Any Questions..?