Lab # 2 – HW & FW Rectifiers
Evaluation:
IMPORTANT! You must complete this experiment during your scheduled lab period. All the
work must be demonstrated to and verified by your lab instructor before the end of your
scheduled lab period.
Step
Lab Report
Individual
Evaluation
Module
A detailed written explanation for the
particular experiment
In lab evaluation & Moodle activity
Total
percentage
Score
60%
40%
100%
Signature of Evaluator: _
Academic Honesty Statement:
IMPORTANT! Please carefully read and sign the Academic Honesty Statement, below. You will
not receive credit for this lab experiment unless this statement is signed in the presence of your
lab instructor.
“In signing this statement, I hereby certify that the work on this experiment is my own and that
I have not copied the work of any other student (past or present) while completing this
experiment. I understand that if I fail to honor this agreement, I will receive a score of ZERO
for this experiment and be subject to possible disciplinary action.”
Name:
ID:
Section:
Signature:
Date:
Regulations:
 Plagiarism: In case of plagiarism, you will receive an email to resubmit your work,
with the following rule:
o Resubmission within 24h from email notification: 40% deduction
o Resubmission within 48h from email notification: 60% deduction.
o Failing to resubmit within two days after notification means that the
assessment will be awarded 0.

Late Submission: After the submission deadline, students have a maximum 2-days
grace period for late submissions with the following penalty (excluding Fridays):
o first day, within 24h from the deadline, 40% deduction
o Second day, within 48h from the deadline, 60% deduction.
o Failing to submit within two days after notification means that the assessment
will be awarded 0.

Wrong Submission: Students have the full responsibility of:
o submitting the required documents within the deadline
o verifying that the correct files are submitted
o Verifying that the submitted files are not corrupted.
Resubmission of student’s work falls under late submission policy.
Objectives
 To build and safely test a half wave rectifier, and full-wave rectifier and compare
the input with the output.
 Connect a filter capacitor to the circuit and measure the ripple voltage of HWR.
 Be familiar with the use of a function generator and a digital oscilloscope.
Equipment
Lab Equipment
Arbitrary Function Generator
Digital oscilloscope
Bread Board
Equipment Description
AFG-2025
GDS-2074A
Prototype Bread Board
Component
Part
Spice Part
Name
Values
1N4002- Silicon Diode
D1N4002
-
Resistor
R
1.5 kΩ Resistor
Resistor
R
2.2 kΩ Resistor
Capacitor
C
4.7 uF
INTRODUCTION
Diode Rectifiers are used to change ac signals into dc signals. In general, diodes act as a one
way valve, allowing current to flow in only one direction. When an AC input is applied to a
diode, the diode will be forward biased for one-half of the cycle of the input and reverse biased
for the other half cycle. The output waveform is a pulsating dc waveform (or half-wave
rectified). This pulsating dc waveform can be then be filtered to convert it to constant dc. In
this experiment the students will learn how to obtain and plot the voltage graph of a diode
operating under AC voltage before and after filtration for HWR and FWR.
EXPERIMENT
Part 1: Half-wave Rectifier
1. Construct the rectifier circuit shown in Figure 1 on the breadboard.
Figure 1. Half-wave Rectifier Circuit
2. Set amplitude and frequency value. ( Vampl= _______ & f= _______ )
3. By using the oscilloscope, show the input and output of the circuit. Use CH1 for the
input and CH2 for the output. Measure Vpp, Vmax and Vmin for both input and
output.
4. Construct the rectifier circuit shown in Figure 2 on the breadboard. Keep the applied
settings given in step 2.
Figure 2. Half-wave Rectifier with filter
5. By using the oscilloscope, show input and output the waveforms. Use CH1 for the
input and CH2 for the output. Measure Vpp, Vmax and Vmin for both input and
output.
6. Calculate the ripple voltage by using the measured values.
7. Change the input frequency to 100 Hz and 10 kHz respectively and observe its
effects. What can you say about the ripple voltage for each changed frequency value?
Explain it in your report in detail.
Part 2: Full-wave Rectifier
1. Construct the Full-wave Rectifier circuit shown in Figure 3 on the breadboard.
Figure 3. Full-wave Rectifier circuit
2. Set V1 = ____ V (peak) at f = 50 Hz.
3. By using the oscilloscope, show input and output the waveforms. Use CH1 for the
input and CH2 for the output. Note that you need to use Math function in
oscilloscope to apply CH2 – CH1 in order to see the Full-Wave rectified waveform.
4. Insert a 4.7uF capacitor to be parallel to the resistor to see the filtration.
5. Explain what happens before and after the capacitor.
Note that when you prepare your report, you need to give full detail of
entire experiment. For example, how each circuit is built, detailed
explanations for the result screen shots, etc.
INDIVIDUAL SIMULATION
IMPORTANT NOTE: Simulate below and answer all questions needed
circuits individually (each student separately). Individual simulation is
ONLY accepted within lab report. Other type of submissions are NOT
acceptable.
Each student has to take screenshots for all his/her waveforms and circuits
to be inserted in their lab report. When you create a simulation profile on
OrCAD, you need to write your name & ID, and when you take its
screenshot, it has to be visible by your instructor. If no name, deduction will
be applied. All values must be shown on your simulation screenshots even if
you fill a table.
1. Build the circuit given in Figure 1 below, where Vampl= ____V and f= ____kHz.
Figure 1. HWR Circuit (unfiltered)
2. Find input and output signals for ___ cycles, and fill the table below from your
simulation results.
Run-to-time
Vin (p)
Vout (p)
Vin (pp)
Vout (pp)
Vin (max)
Vout_(max)
Vin (min)
Vout (min)
Vripple
3. Insert a capacitor (4.7uF) to be parallel to the resistor in the circuit given in Figure 1,
and find input and output signals for ___ cycles. Fill the table below from your
simulation results.
Run-to-time
Vin (p)
Vout (p)
Vin (pp)
Vout (pp)
Vin (max)
Vout (max)
Vin (min)
Vout (min)
Vripple