electronics bridge rectifier half wave rectifier

1. Name Muhammad Talha Saeed
Reg. # 19-NTU-TE-0129
Experiment 4:
Demonstrate the behavior of semiconductor diodes in half-wave and full-wave
rectifiers both with and without capacitor filter
Apparatus:
Electro-Technic Lab Trainer,
Oscilloscope,
Digital Multi-meter,
Connecting leads.
Half-wave rectifier without and with capacitor filter
Circuit Diagram
a) b)
Figure 1 Half-wave rectifier a) without and b) with capacitor filter
Procedure
1. Connect the circuit as shown in Figure 8 a) using Electro-technic Lab Trainer and
Connecting leads.
2. Connect one of the probes of the oscilloscope across the output terminals of the transformer
and the second probe across the load resistor R.
3. Turn on the scope, set the channel selector to “Dual” mode, and coupling to DC. View both
of the signals simultaneously with proper voltage and position setting.
4. Set the selector switch of the multi-meter at AC voltage range.
5. Measure the AC voltage across the output terminals of the transformer using DMM and
record the reading.
11.31 V

2. 6. Measure the DC voltage across the load resistor with the help of digital multi-meter and
record.
4.78 V
7. Paste picture of the output voltage observed by the oscilloscope in the following chart.
WhatsApp Video 2022-04-04 at 11.30.42 AM.mp4
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8. Measure the output frequency and record.
T = 4x5 ms = 20 ms = 0.02 s
f = 1/T = 1/0.02
f = 50 Hz
9. Measure the peak value of the output voltage of the half-wave rectifier with the help of
oscilloscope and record.
= 3.4 x 5
= 17
10. Now, connect the capacitor filter across the load resistor as in Figure 8 b).
11. Paste picture of the output voltage observed by the oscilloscope in the following chart.
WhatsApp Video 2022-04-04 at 11.30.42 AM (1).mp4
Double click on video icon to open this

3. Full-wave rectifier without and with capacitor filter
Circuit Diagram
a) b)
Figure 2 Full-wave rectifier a) without and b) with capacitor filter
Procedure
1. Connect the circuit as shown in Figure 9 a) using Electro-technic Lab Trainer and
Connecting leads.
2. Connect one of the probes of the oscilloscope across the output terminals of the transformer
and the second probe across the load resistor R.
3. Turn on the scope, set the channel selector to “Dual” mode, and coupling to DC. View both
of the signals simultaneously with proper voltage and position setting.
4. Set the selector switch of the multi-meter at AC voltage range.
5. Measure the AC voltage across the output terminals of the transformer using DMM and
record the reading.
11.05 V
6. Measure the DC voltage across the load resistor with the help of multi-meter and record.
8.74 V
7. Measure the peak value of the output of the full-wave rectifier with the help of oscilloscope
and record.
= 3.3 x 5
= 17
8. Measure the output frequency and record.
T = 2x5 ms = 10 ms = 0.01 s
f = 1/T = 1/0.01
f = 100 Hz
9. Paste picture of the output voltage observed by the oscilloscope in the following chart.

4. WhatsApp Video 2022-04-04 at 11.30.43 AM (1).mp4
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10. Now, connect the capacitor filter across the load resistor as in Figure 9 b).
11. Paste picture of the output voltage observed by the oscilloscope in the following chart.
WhatsApp Video 2022-04-04 at 11.30.43 AM (3).mp4
Double click on video icon to open this
Interpretation and Analysis
Is there any frequency difference between half- and full-wave rectifier? If yes, then
why?
Yes frequency is different in half wave and full wave rectifier for same input frequency. In half
wave the output frequency is same as input frequency. As it allows only a half cycle of AC
input voltage. While in case of full wave rectifier the output frequency is twice the input
frequency as it allows full cycle of AC input voltages to pass.
Is there any difference between magnitude of DC output voltage of half- and full-wave
rectifier? If yes, then why?
Yes there is difference between magnitude of DC output voltage of Half and Full-wave
rectifier. Because in half wave only half input cycle is rectified while in full wave whole cycle
is rectified so out put voltage of full wave rectifier is higher.
Conclusion
From the experiment, results and above discussion it is concluded that both half wave and full
wave rectifiers are used to transform AC into pulsating DC. Only the variation is the utilization
of an applied input signal. However, pulsating dc output shows that some AC ripples are also
present in it. So, it must be as small as possible. But the AC ripples in case of half wave
rectifier is somewhat more as compared to full wave rectifier.