Electronics > Beginners
Do bypass caps invert the signal? 1010101 to 0101010
StillTrying:
A capacitor acts exactly the same as a small fast rechargeable battery, there's no inversion or delays anywhere. :D
tggzzz:
--- Quote from: rstofer on August 11, 2018, 09:19:31 pm ---Hero999 is one of the better responders. Look at his post count; he's been doing this for a very long time!
Here's the problem: A lot of us are real, live, engineers. Been to school and everything. We don't get up in the morning without documentation and something to doodle with/on. I can't even talk without making a sketch!
If the OP can't post a link, why bother to form a reply? I didn't... In fact, that should have been the only reply. "Where's the video, where's the schematic and where are the links to any applicable datasheets?"
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Just so.
I must admit being surprised that someone with so many posts couldn't be bothered to ask a "good" well thought out question. Now we all make similar mistakes occasionally, but it behooves us to quickly acknowledge our mistake and apologise.
Beginners, and I don't count the OP in that category, are often unaware of what constitutes a "good question". They night benefit from understanding https://entertaininghacks.wordpress.com/library-2/good-questions-pique-our-interest-and-dont-waste-our-time-2/
Brumby:
Asking a question in the beginner's section that just seems bizarre should not evoke fire and brimstone responses. Somebody is obviously confused, got the wrong end of the stick and needs guidance.
However, making mention of a video without any qualification limits the content that was viewed to anything on the planet earth. This includes not only internet, but anything on someone's PC, a VHS tape or even a super-8 film if you want to take the definition to its broadest extent.
This is something of which ANY question raiser should be aware. We aren't mind readers - and the only response to suggest it may have been some of Dave's videos correctly noted this as a guess. Guessing at the start can take a discussion in any one of a thousand wrong directions.
The more information provided in the question, the better the question can be understood and the better the chance a useful answer can be offered sooner.
The comment about asking "good" questions is a very fair one - and it is more about the structure of the question.
Simon:
--- Quote from: Beamin on August 11, 2018, 04:03:26 pm ---
--- Quote from: enjoy.cowboy on August 10, 2018, 11:14:29 pm ---Thats not how this works at all. The bypass cap will filter out some frequencies to ground, it doesnt tap off into another data line. All the bypass cap does is cut some of the judder and flutter in the data line/clock line so the noise doesnt add up,when going to another tranny. Also the DC phase shift wouldnt cause the digital signal to be inverted. If that would be the case, all we would need to build a computer would be enough caps to build nand gates ;) The signal measured at the cap cannot be considered logical, as well
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That's what I was thinking of: phase shift; like in an RF signal where you can use it to change wave length of things without making it longer or shorter physically. Cap charges and no electricity flows, the other end becomes negative and electricity flows. Kind of like a rectifier doubles the frequency. No crossing of data lines don't know why you would do that.
I also realized that was a hero999 post before looking at the name: Just so you know those type of responses' scare away beginners because they are afraid to ask questions because someone make think they are dumb. Fortunately that doesn't work on me because I have no shame... or rather I don't value the opinion of hostile people, choosing to ignore them, and their insecurities that they try to project onto others. Remember at some point EVERY ONE here had no idea of what an electron even was. What's an electron you ask? OMG that's a stupid question google it, the nerve, asking questions on the internet, god people are stupid... Then you say: "fuck this hobby I don't want to end up like those people." More parts for you right? There was an Arduino forum like that when it first became popular and most people didn't understand it. I watch the forum die, because every time a question was asked there would just be a hostile and/or way overly technical answer or, of course; "google it". Ironic because I'm sure that forum is not on google and that's where all the new members went and found better forums.
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Your first post covers several areas and is vague. We have many people rocking up asking such short open ended questions that a book could be the answer and it gets annoying. Bypass caps and speed of processers along with EMC are 3 entirely different threads if you want proper answers.
Bypass capacitors go in parallel not series so you may not have watched that video clearly or it was rubbish. As stated we don't know where you are coming from as we have not seen the video.
tooki:
--- Quote from: hamster_nz on August 11, 2018, 08:24:34 pm ---I will explain a bit better later, but at high frequency an idea cap acts as a wire, and at a low frequency it is if it isn't there.
It is only in between these two regions where things get trick and you have to analyse things in detail bacause it is acting like a filter.
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What a great explanation of how caps work!! :-+
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