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Name: S Meyiwa STUDENT NUMBER: 21945099 Subject Name: Electronics 1 Report Title: Practical 1 Report

1) The document describes an electronics experiment to identify the forward characteristic curve of a diode. Components used include a 470 ohm resistor, generic diode, and 22k potentiometer. 2) The experiment measured voltage across the diode and resulting current using a voltmeter as the potentiometer was adjusted. Current increased with voltage in a nonlinear fashion. 3) Analysis found that current was zero until 0.56V, then increased from 0.02mA to 19.7mA as voltage rose from 0.56V to 0.73V, demonstrating the diode's nonlinear forward bias characteristic.

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78 views4 pages

Name: S Meyiwa STUDENT NUMBER: 21945099 Subject Name: Electronics 1 Report Title: Practical 1 Report

1) The document describes an electronics experiment to identify the forward characteristic curve of a diode. Components used include a 470 ohm resistor, generic diode, and 22k potentiometer. 2) The experiment measured voltage across the diode and resulting current using a voltmeter as the potentiometer was adjusted. Current increased with voltage in a nonlinear fashion. 3) Analysis found that current was zero until 0.56V, then increased from 0.02mA to 19.7mA as voltage rose from 0.56V to 0.73V, demonstrating the diode's nonlinear forward bias characteristic.

Uploaded by

siyabonga macya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as ODT, PDF, TXT or read online on Scribd
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SS

NAME : S Meyiwa
STUDENT NUMBER : 21945099
SUBJECT NAME : Electronics 1
REPORT TITLE : Practical 1 report
1. Aim
The aim of this experiment is to identify the graph of a diode (forward characteristic curve
of a diode)

2. Components
 470 Resistor

 Generic diode

 22k Potentiometer HG

1.1 Proteus software


1.1.1 Generic diode
Definition- it is an electronic component made of semiconductor that allow current flow in
one direction and block in reverse direction

Function- is to allow an electric current to pass in one direction while blocking it in the
opposite direction

2.1.2 Resistor
Definition- is a passive two-terminal component that restrict flow of current
Function- is to control the flow of current

2.1.3 Potentiometer HG
Definition- is the only active variable resistor that allow you to change the resistance during
simulation run-time

Function- used to control electrical devices such as volume controls on audio equipment.
3. Circuits diagram

RV1(2)

RV1

R1
+88.8
100% 470 mA

22k

S MEYIWA
D1+88.8
21945099
DIODE
Volts

4. Experiment result
DIODE VOLTAGE (V) CURRENT(Ma) (Proteus)
0.10 0.00
0.20 0.00
0.30 0.00
0.40 0.00
0.50 0.00
0.56 0.02
0.60 0.09
0.65 0.68
0.70 5.09
0.73 19.70

5. Results Analysis and Discussion


In this experiment we used voltmeter to measure voltage across diode so that we can identify
current that flow through it. To find current we have to adjust potentiometer until the voltage
across the diode is 0.10 volts then we start measuring the current that will flow through the
diode. The current depends on a voltage when the voltage increases the current also increasing
that mean the current is directly proportional to voltage (ohms law). The start graph increases
from 0.56V
- When the voltage across the diode is 0.10V they is no current flowing through diode, current is
0.00mA

- When the voltage across the diode is 0.20V they is no current flowing through diode, current is
0.00mA

- When the voltage across the diode is 0.30V they is no current flowing through diode, current is
0.00mA

- When the voltage across the diode is 0.40V they is no current flowing through diode, current is
0.00mA

- When the voltage across the diode is 0.50V they no current flowing through diode, current is
0.00mA

- When the voltage across the diode is 0.56V current start flowing across the diode, the current
that flows through is 0.02Ma and the graph increases

- When the voltage across the diode is 0.60V the current flows through the diode is 0.09mA

- When the voltage across the diode is 0.65V the current flowing through the diode is 0.68mA

- When the voltage across the diode is 0.70V the current flowing through the diode is 5.09mA

- When the voltage across the diode is 0.73V the current flows through the diode is 19,70Ma

6. Conclusion
The graph is increasing the, current increases with an increase in voltage and the graph causes
the curve. The diode conducts current with increase in voltage

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