Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
From my understanding the fast rise time essentially means a square wave instead of a sine wave and that would saturate the inductor(s). It would still have to be due to the reflection even though that reflection, it's just one that occurs instantly. I could have had a coax with open (or short)...
That's very interesting, a little bit over my head, I'll have to ponder that :D
On a different note, I checked on ebay if anyone is selling any of these and the one I found which appeared to have been in great shape, the guy didn't know anything about it and wanted to show that it works, in...
Great explanation. The radio I was talking about is an original President Lincoln, which is from a very long time ago so I will give it a pass on the "poorly designed" but otherwise agree with you. In my case the transistor must have not been able to handle the voltage.
I would say that in a...
I knew it would be bad but it was an accident. This is a really long time ago. I think I had moved the radio or something like that and forgot to hook up the antenna cable. Then when I started using it I was wondering why I wasn't receiving anything, then realized it, plugged the antenna cable...
I think NB-IoT would work, I'm pretty sure it connects via cell towers so probably has a lot of coverage. The only issue I see is that I think it costs money for a data plan.
I'm not sure this exists. Basically someone would have to translate the silicone into code and then verify everything that it matches, plus probably do all the revisions and errata items too, that would probably take an extremely long time and they wouldn't make any money from this because 99.9%...
This guy on youtube drives me crazy, he says that reflected power does not go back to the transmitter and that the transmitter doesn't see the reflection. I disagree with him so he deleted my comment at first until I tell him again with a different account. The worst part is he's pretending to...
Wow, thank you all so much for this valuable information. I also thought it was not OK and there is no reason to have a power source this bad, at least not for things involving a microcontroller and other similar components.
The source of the noise is indeed from arcing on a relay. The person...
Hi, I'm getting a voltage spike from a power supply and I'm measuring it directly at the microcontroller (MCU). I know that it exceeds the absolute maximum rating but it is extremely bief. You can see below that it is about 10 V and the absolute maximum rating for the MCU is 4 V, however it...
I noticed that too but I said that's close enough. My intuition told me that time is still part of the X-axis because of the letters where we go from A to B to C and so forth. I figured we are following this curve and that it can have a different shape depending on the current but that overall...
That's what I learned too when doing VNA measurements. Think of the outside of the shield and inside of the shield as 2 separate conductors, and they "touch" where you make the connection to your antenna. I've done this type of measurement in the past and I put a ferrite bead around the cable as...
Thank you guys so much for helping me to understand this, especially @FvM, you showed me the door :) and it helped me look up the right stuff.
Probably one of the best pictures I found was from https://en.wikipedia.org/wiki/Electric_discharge
This looks exactly like from one of my scope shots...
@KlausST that is correct, although there is also a power supply in parallel to this but I don't foresee that causing such spikes.
I can't see any spark, that is just a theory, the relay is enclosed.
For good measure I posted the schematic below. It is for a light that can turn on and off with...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
