One way would be to build a window detector set at lets say 48 and 52%, then low pass filter the PWM signal to turn it into a DC signal.I am using 555 timer to create PWM signal, It is required to use a notification LED, that will be on when reaching 50% duty cycle and off when different than 50%. Any help please
Is this a school/college project?It is required to use a notification LED
Who cares? It is an interesting problem.Is this a school/college project?
That makes more sense.correction
Sorry. It is required that the LED is on when the duty cycle is larger than 50% and off when the duty cycle is below 50%
That makes it a tiny bit easier to design.It is required that the LED is on when the duty cycle is larger than 50% and off when the duty cycle is below 50%
Clearly you don't ; but in the interests of education we should be guiding students, rather than spoon-feeding them ready-made solutions.Who cares?
I learn better though a discussion, examples and listening to multiple arguments concerning the merits of various options. The line of educational thought in the homework section is laughable. If you would spend any time in an education department of local teachers college, you will quickly learn that most students taught by the Socratic method need to be highly motivated and the teacher must have a clear understanding of the students ability - otherwise the teacher is only creating frustration for the student.Clearly you don't ; but in the interests of education we should be guiding students, rather than spoon-feeding them ready-made solutions.
Our assumption is that students who are assigned homework have the background and the motivation to succeed. If they lack that then nothing we do is going to fix that problem, and more to the point, fixing that problem is not our responsibility. I agree with your position for every other subforum. In Homework Help, we are not asking for complete solutions, we are only asking students to show us what they know so that we can help them toward the solution. I don't think that is too much to ask.I learn better though a discussion, examples and listening to multiple arguments concerning the merits of various options. The line of educational thought in the homework section is laughable. If you would spend any time in an education department of local teachers college, you will quickly learn that most students taught by the Socratic method need to be highly motivated and the teacher must have a clear understanding of the students ability - otherwise the teacher is only creating frustration for the student.
I think you would have a huge student following of thousands of students if you discuss options and solutions with students rather than torment them with a poorly implemented Socratic method. Let's see what this OP leans here and then we can look at how many OPs have abandon their post over in the homework section.
That is fine - I didn't say it should be changed, or that I wanted to fix it. Already tried and met certain unmovable objects. Because if that culture of stasis, I would like to see posts in subforms that the Op decided to post in. If they don't want to post a homework question in homework, they should be allowed to post anywhere they please. Let the members decide how much they want to tutor the OP out of ignorance. Threads should not be moved because a mod suspects (or is even told) it is homework. An OP can be advised that they might get different / better / ??? Help in the homework section but a thread should not be moved without the OPs consent.Our assumption is that students who are assigned homework have the background and the motivation to succeed. If they lack that then nothing we do is going to fix that problem, and more to the point, fixing that problem is not our responsibility. I agree with your position for every other subforum. In Homework Help, we are not asking for complete solutions, we are only asking students to show us what they know so that we can help them toward the solution. I don't think that is too much to ask.
The other problem we run into, as parents, is the requirement that a problem be solved in a particular prescribed way. This is pedagogical BS. In my view any method at all that solves the problem is a valid method. Some methods are faster, or easier to understand, or better by some metric; but that is hardly the point.
As an example a student might show up with a problem on KVL and says:
"I understand that voltages around a loop must sum to zero, but I don't quite understand what is going on in the common branch of a circuit with two loops and two sources." This is a student we can and should work with.
The other kind of student just says: "Show me the solution".
In my view that is just dishonest. If that is the way people want to play the game, then we would certainly have to adjust our approach to "homework like" questions regardless of where they occur. Does that really benefit the community?That is fine - I didn't say it should be changed, or that I wanted to fix it. Already tried and met certain unmovable objects. Because if that culture of stasis, I would like to see posts in subforms that the Op decided to post in. If they don't want to post a homework question in homework, they should be allowed to post anywhere they please. Let the members decide how much they want to tutor the OP out of ignorance. Threads should not be moved because a mod suspects (or is even told) it is homework. An OP can be advised that they might get different / better / ??? Help in the homework section but a thread should not be moved without the OPs consent.
Why is it that so many engineers say, "I came out of college and felt like I didn't know anything. Then, after a few months on the job, I knew x, y and z like the back of my hand." It is because not everyone benefits from "being taught" or "doing homework". Some people learn by doing, some learn from discussion and some learn from simply seeing another person work through the problem one more time or one more different way. It has nothing to do with being fair or benefiting a community by "showing the solution". If that lets them through an engineering class, then professors are not putting enough weight on the exam and too much weight on homework.In my view that is just dishonest. If that is the way people want to play the game, then we would certainly have to adjust our approach to "homework like" questions regardless of where they occur. Does that really benefit the community?
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