s3a's latest activity
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Let's restart. I did a lot of problems for those (Kirchoff's Laws, and Ohm's Laws too, but that's kind of trivial) and my answers...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.The following is (i) and (ii).: I guess I should also add a (iii) that is the voltage when the switch is closed can be determined by...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work."Pullups and pulldowns are there to prevent inputs from being undefined and floating while nothing else is connected to said input pin...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Sorry for the delay. To try to get back to the fundamentals, in short, is the concept of a pull-up or pull-down resistor just a matter...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Are you talking about the pull-up-resistor case (and not the pull-down-resistor one)? If so, looking at the Wikipedia diagram for it...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Sorry, I'm probably just slow. :P :( So, the resistor has one end attached to the table top, but the other end is not attached to...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Oh. :P I was trying to do what I thought you said and wasn't thinking in a real-life way. So, it's basically Req2 = Req1 in both cases...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Okay, good to have the GND thing confirmed. As for the other part, I am using the diagram with the pull-down resistor from the image...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Switch closed: V = R*I V = 0*I V = 0 (logic low) Switch open: V = R*I V = (R1+R2)*I (logic high since R1+R2 is a finite resistance so...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.So, I find Req at the pin? Switch open: Req = 1 / (1/Rs + 1/R2) Req = 1 / (1/INF + 1/R2) Req = 1 / (0 + 1/R2) Req = R2 Switch closed...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Actually, I realized that that explanation I gave doesn't address the voltages, so that logic wouldn't be good enough for at least CMOS...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Thanks for your responses and sorry for my late one. It will probably seem trivial to you guys, but this (Reddit) post explains and...
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Ss3a replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.To Baluncore: My confusion was far more basic than that, but thanks anyway. For one, I didn't know TTL was the old stuff and CMOS the...
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Ss3a posted the thread I'm trying to intuit how pull-up and pull-down resistors work in Electrical Engineering.For the attached image (from https://en.wikipedia.org/wiki/Pull-up_resistor), could someone please help me intuit what happens in each...
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