Week #4: PWM Circuits

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rjagodowski
Posts: 2370
Joined: Fri Sep 04, 2015 6:59 pm

Week #4: PWM Circuits

Post by rjagodowski »

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.

Exp. #4 PWM Control Circuit v21.1.pdf
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LM311 comparators.pdf
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LM311 Data Sheet.pdf
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555 PWM Circuit Controlling a DC Motor The second lab circuit is based on this.
jhgirouard2101
Posts: 62
Joined: Thu Sep 08, 2022 3:24 pm

Re: Week #4: PWM Circuits

Post by jhgirouard2101 »

week 4 lab
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rpoznyur2101
Posts: 65
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Re: Week #4: PWM Circuits

Post by rpoznyur2101 »

Week 4 Lab
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jrvicenty2101
Posts: 65
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Re: Week #4: PWM Circuits

Post by jrvicenty2101 »

Week 4 Lab
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vaseleznev2001
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Re: Week #4: PWM Circuits

Post by vaseleznev2001 »

Vlad Seleznev
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edmedina0001
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Joined: Fri Sep 16, 2022 5:19 pm

Re: Week #4: PWM Circuits

Post by edmedina0001 »

Evan Medina
EET-250 Week 4
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kjchampoux2001
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Re: Week #4: PWM Circuits

Post by kjchampoux2001 »

Lab #4
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etjameson2001
Posts: 34
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Re: Week #4: PWM Circuits

Post by etjameson2001 »

Eli Jameson
Week 4 2-21-2023
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reespinoza2101
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Re: Week #4: PWM Circuits

Post by reespinoza2101 »

Rodrigo
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pagarcia2101
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Re: Week #4: PWM Circuits

Post by pagarcia2101 »

Paula Garcia Week 4
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rjstrange2101
Posts: 48
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Re: Week #4: PWM Circuits

Post by rjstrange2101 »

Submission
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hnle
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Re: Week #4: PWM Circuits

Post by hnle »

Week 4
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ncfutrell0001
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Re: Week #4: PWM Circuits

Post by ncfutrell0001 »

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Week 4
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