Week #4: PWM Circuits
-
- Posts: 2380
- Joined: Fri Sep 04, 2015 6:59 pm
Week #4: PWM Circuits
NOTE: Due to a difference between our lab equipment and what is specified in this lab, there are numerous adjustments and changes made to the schematics and tables in the handouts. Follow the modified directions on the lab sheet very carefully.
This week we will investigate the operation of two circuits which will create a PWM (Pulse-Width Modulated) output. You can download a copy of the experiment here in the Registered Users Only area. A hard copy will be provided for you in lab on Tuesday or Thursday.
Post your screenshots as a Reply to this Topic.
The first circuit uses the LM311 Precision Comparator which most of you used last semester for the Thermostat Temperature Comparator experiment, along with the LM34. There are additional handouts to explain the operation of the LM311 and the actual LM311 Data Sheet.
There is a second PWM circuit which makes use of a 555 Timer IC which will be used to create a PWM signal amplified by an NPN transistor to drive a 12V DC fan. You should take a few sample screenshots of the 555 output as well, noting the proportional speed of the motor at each Duty Cycle setting.
555 PWM Circuit Controlling a DC Motor The second lab circuit is based on this.
This week we will investigate the operation of two circuits which will create a PWM (Pulse-Width Modulated) output. You can download a copy of the experiment here in the Registered Users Only area. A hard copy will be provided for you in lab on Tuesday or Thursday.
Post your screenshots as a Reply to this Topic.
The first circuit uses the LM311 Precision Comparator which most of you used last semester for the Thermostat Temperature Comparator experiment, along with the LM34. There are additional handouts to explain the operation of the LM311 and the actual LM311 Data Sheet.
There is a second PWM circuit which makes use of a 555 Timer IC which will be used to create a PWM signal amplified by an NPN transistor to drive a 12V DC fan. You should take a few sample screenshots of the 555 output as well, noting the proportional speed of the motor at each Duty Cycle setting.
555 PWM Circuit Controlling a DC Motor The second lab circuit is based on this.
-
- Posts: 62
- Joined: Thu Sep 08, 2022 3:24 pm
Re: Week #4: PWM Circuits
week 4 lab
- Attachments
-
- Screenshot 2023-02-15 211647.jpg (118.56 KiB) Viewed 3132 times
-
- scope_0.png (27.79 KiB) Viewed 3131 times
-
- scope_01.png (28.05 KiB) Viewed 3131 times
-
- scope_02.png (28 KiB) Viewed 3131 times
-
- Posts: 65
- Joined: Thu Sep 08, 2022 10:49 pm
Re: Week #4: PWM Circuits
Week 4 Lab
- Attachments
-
- scope_5.png (32.59 KiB) Viewed 3127 times
-
- scope_8.png (23.77 KiB) Viewed 3127 times
-
- scope_7.png (23.88 KiB) Viewed 3127 times
-
- scope_4.png (34.77 KiB) Viewed 3127 times
-
- IMG-6385.jpg (2.92 MiB) Viewed 3127 times
-
- Posts: 65
- Joined: Fri Sep 10, 2021 2:30 pm
Re: Week #4: PWM Circuits
Week 4 Lab
- Attachments
-
- 250 week 4 lab.jpg (1.1 MiB) Viewed 3122 times
-
- 250_week_4_lab_3.png (31.65 KiB) Viewed 3122 times
-
- 250_week_4_lab_1.png (31.83 KiB) Viewed 3122 times
-
- 250_week_4_lab_2.png (31.94 KiB) Viewed 3122 times
-
- 250_week_4_part_2_1.png (24.09 KiB) Viewed 3122 times
-
- 250_week_4_part_2_3.png (24.12 KiB) Viewed 3122 times
-
- 250_week_4_part_2_5.png (23.7 KiB) Viewed 3122 times
-
- Posts: 59
- Joined: Tue Nov 09, 2021 9:12 am
Re: Week #4: PWM Circuits
Vlad Seleznev
- Attachments
-
- scope_4.png (34.77 KiB) Viewed 3119 times
-
- scope_5.png (32.59 KiB) Viewed 3119 times
-
- scope_6.png (32.21 KiB) Viewed 3119 times
-
- scope_7.png (23.88 KiB) Viewed 3119 times
-
- scope_8.png (23.77 KiB) Viewed 3119 times
-
- scope_9.png (24.38 KiB) Viewed 3119 times
-
- Week # 4.jpg (3.13 MiB) Viewed 3119 times
-
- Posts: 54
- Joined: Fri Sep 16, 2022 5:19 pm
Re: Week #4: PWM Circuits
Evan Medina
EET-250 Week 4
EET-250 Week 4
- Attachments
-
- 250_week_4_lab_0.png (31.48 KiB) Viewed 3097 times
-
- 250_week_4_lab_1.png (31.98 KiB) Viewed 3097 times
-
- 250_week_4_lab_2.png (31.42 KiB) Viewed 3097 times
-
- 250_week_4_lab_3.png (31.68 KiB) Viewed 3097 times
-
- 250_week_4_part_2_2.png (23.3 KiB) Viewed 3097 times
-
- 250_week_4_part_2_3.png (23.57 KiB) Viewed 3097 times
-
- 250_week_4_part_2_4.png (23.59 KiB) Viewed 3097 times
-
- Posts: 26
- Joined: Tue Jan 31, 2023 8:28 pm
Re: Week #4: PWM Circuits
Lab #4
- Attachments
-
- scope_4.png (30.33 KiB) Viewed 3086 times
-
- scope_5.png (28.18 KiB) Viewed 3086 times
-
- scope_6.png (28.58 KiB) Viewed 3086 times
-
- scope_7.png (22.77 KiB) Viewed 3086 times
-
- scope_8.png (22.8 KiB) Viewed 3086 times
-
- scope_9.png (22.48 KiB) Viewed 3086 times
-
- Posts: 34
- Joined: Sun Oct 11, 2020 5:57 pm
Re: Week #4: PWM Circuits
Eli Jameson
Week 4 2-21-2023
Week 4 2-21-2023
- Attachments
-
- scope_4.png (30.33 KiB) Viewed 3083 times
-
- scope_5.png (28.18 KiB) Viewed 3083 times
-
- scope_6.png (28.58 KiB) Viewed 3083 times
-
- scope_7.png (22.77 KiB) Viewed 3083 times
-
- scope_8.png (22.8 KiB) Viewed 3083 times
-
- scope_9.png (22.48 KiB) Viewed 3083 times
-
- Posts: 29
- Joined: Thu Sep 22, 2022 12:07 am
Re: Week #4: PWM Circuits
Rodrigo
- Attachments
-
- scope_4.png (30.02 KiB) Viewed 3056 times
-
- scope_5.png (30.89 KiB) Viewed 3056 times
-
- scope_6.png (29.77 KiB) Viewed 3056 times
-
- scope_7.png (30.24 KiB) Viewed 3056 times
-
- scope_8.png (27.63 KiB) Viewed 3056 times
-
- scope_09.png (26.95 KiB) Viewed 3056 times
-
- scope_10.png (25.52 KiB) Viewed 3056 times
-
- Posts: 63
- Joined: Thu Sep 23, 2021 9:12 am
Re: Week #4: PWM Circuits
Paula Garcia Week 4
- Attachments
-
- IMG_5455.pdf
- (2.51 MiB) Downloaded 153 times
-
- 1_25.png (30.61 KiB) Viewed 2924 times
-
- 2_50.png (29.9 KiB) Viewed 2924 times
-
- 3_75.png (28.92 KiB) Viewed 2924 times
-
- 30.png (22.85 KiB) Viewed 2924 times
-
- 40.png (23.35 KiB) Viewed 2924 times
-
- 50.png (22.89 KiB) Viewed 2924 times
-
- 75.png (23.45 KiB) Viewed 2924 times
-
- 90.png (23.3 KiB) Viewed 2924 times
-
- 10o.png (22.96 KiB) Viewed 2924 times
-
- Posts: 48
- Joined: Fri Sep 09, 2022 12:30 am
Re: Week #4: PWM Circuits
Week 4
- Attachments
-
- 2.jpg (515.49 KiB) Viewed 2908 times
-
- 1.jpg (1.25 MiB) Viewed 2908 times
-
- 3.jpg (1.24 MiB) Viewed 2908 times