Comment by periblepsis on How does one do inequality comparison of unsigned...
I just use an adder with the subtrahend inverted and the carry in equal 1 and look at the carry out. I could write something. But what in the heck is their "subtractor" made like?
View ArticleComment by periblepsis on How does one do inequality comparison of unsigned...
@greybeard Not in the OP question. And I want the OP to spend time working things out more than he has been.
View ArticleComment by periblepsis on How does a process calibrator source a resistance?
I'd like you to talk about traceability to NIST or DIN (Deutsches Institut für Normung) for example. Accuracy must be traceable. How many steps between a standard organization and your point of...
View ArticleComment by periblepsis on Whence lucid reference presentations of circuitry...
One demarcation often found is restoring vs non-restoring division. Can you point to anything on that wiki page that may provide some context to your question? (I'm confused over your wording, I guess,...
View ArticleComment by periblepsis on Why does one circuit work but not the other in...
@Dereck Post the netlists for both, please.
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Answer by periblepsis for Is my average power logic correct?
It may be easier to see why by looking at the following instantaneous power curve (from Desmos web-plotting) for the resistor:You can see that the approximate average is likely to be a little above...
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Answer by periblepsis for How can I calculate the base current required for...
From this OnSemi datasheet for the TIP42 you can find in a number of places where they spec its use as a switch using \$\frac{I_{_\text{C}}}{I_{_\text{B}}}=10\$. You may be able to get away with a...
View ArticleComment by periblepsis on Circuit Simulator
@Kubahasn'tforgottenMonica I can't even use CircuitLab here on this site for simulation purposes. Doesn't work. I do pay them their due, each year, because I use it here and I think they deserve the...
View ArticleComment by periblepsis on Circuit Simulator
I cannot say this with enough emphasis, do not use a simulator with "hunt and peck" poking of part values in a hope that you will learn anything. I had much to learn when Spice finally became available...
View ArticleComment by periblepsis on Why is ds = p*dp*dΦ and not ds = dp*dΦ?
@LordOfChimichangas I've never bothered solving this and some of the terms here (like a) escape me for meaning. But I don't care. One thing that is dead-obvious to me is the idea of \$r\,\text{d}r\$...
View ArticleComment by periblepsis on Tweaking Op Amp Emitter Follower
stacksolutions, talk about the application and your expectations. It may be that you think you know how all this works and/or should work. But let others into your head. We may notice something...
View ArticleComment by periblepsis on How do I wire a permanent magnet synchronous motor?
@Donal I found this discussion in one paper on PMS. Skim it and use terms there to help search out more information. I'm unfamiliar with these. So I can't add anything.
View ArticleComment by periblepsis on Analysis of Logic Gates (BJTs)
Hunter, this is a great project/assignment. There's a lot in there, but it is doable and you already have the existence of DTL dating back to the 1960's as a proof of concept. Do your research and...
View ArticleComment by periblepsis on What is a "thread" in computing physically?
A thread is usually taken to be a bit of code that shares the same logical memory space but possesses a separate stack. (Each thread has a separate stack of its own; each thread can be scheduled,...
View ArticleComment by periblepsis on How to check the high voltage of a electrostatic...
For some thoughts see this video.
View ArticleComment by periblepsis on LED circuit: Need to understand how to calculate
@SkePsis The input should be tied to ground through a resistor when inactive. What I see there is, instead, a PB switch that makes or breaks a connection to the MCU pin. But there's no pull-down...
View ArticleComment by periblepsis on Measure very small current with Arduino?
Three orders of magnitude range means you must come up with a way to cover that range. If you keep it linear, which is all that a resistor will do, then you need to accept three orders of linear range....
View ArticleComment by periblepsis on LTspice Meas Directive?
@GodJihyo You've put in more time on this -- I just spent only 5 seconds reading so far -- but the .OP card, which normally just pops up a dialog, will actually produce a nice graph that looks a lot...
View ArticleComment by periblepsis on Op Amp Circuit Gain Does not Match LTSpice Simulation
Stack, (1) I don't trust the 1 uH coil value for one thing. What is really being driven with the circuit you built? (2) Your driver can pull up hard because of the Darlington, but it cannot pull down...
View ArticleComment by periblepsis on Battery life of Li-Po battery if it is under...
(Your writing was difficult for me. But I may follow. So let me put this in my words and you tell me if I understood, or not.) You have a tracker module that includes its own LiPo battery. However, the...
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