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31
And the problem with atmel start is that it is broken, from the pwm_basic.dox file in the documentation section of the prject I just setup that only has the PWM output enabled:

Code: [Select]
   ...

So tell me, am I seeing things or is the PWM documentation mixed up with the ADC documentation? If this is the level of competence they have with the atmel start thing I'd rather spend the time writing my own code rather than trying to fathom out someone elses particularly considering that hey can change that code at any time and i would have to do my research again.

You're right! That's clearly the ADC example tacked onto the end of the PWM documentation. I'd report a bug, but I'm not sure how to do that. I'm sure I'll see more issues like this, now that I'm looking for them.

All that said, using Atmel START has got me a long way, quickly. Most things just work, and for the things that don't, or for where START is too high-level, I have been able read the generated code along with the datasheet, and work out what it ought to be doing for myself.
32
I watched the video, and it looks like the reason he thinks the inductors and FETs are in parallel is from just looking at the controller chip and concludes that it can not control more phases. For the the smaller "drivers" he is already guessing, using likely.
He offered different possibilities on which MOSFETs might be controlled directly from the controller - this suggests there was no real measurement to show they are actually in parallel.

So he is missing out the proof, by showing there are no phase doublers involved.

The controller chip looks a little odd, having some power drivers included. I am still not convinced it could not be used together with phase doublers. It would be an odd solution, but I don't think it's impossible.
33
Test Equipment / Re: Using a AWG and a Scope -> ADC inaccuracy?
« Last post by HendriXML on Today at 07:34:55 am »
However the documentation is sparse / non existing. I know of the wave editor that can be downloaded, but I'd like to create my own binary file. Trust is good control is better.

So does anybody know if there is some documentation on the file format?
Opened EasyWave and then went to Open File, the default format it expects is .csv.
Thanks for replying, but can a CVS be uploaded also directly to the AWG?

Is suppose that it consists of values from 0-1. So these can be scaled, get an offset and get played at different frequencies.

Are they getting resampled while played or will the AWG chose it sampling frequency very precise. For accurate results these things matter :).

I have read it is limited to 14kpt? (For my purpose that should be enough)

Will be busy for a few days, but will come back to this matter.   
34
Quick update guys. Everything is fine with the board, with a sole exception that i misaligned the pins of the transistor on the schematic and the footprint, but luckily it's only a 90 degree rotation. I'll redo the board and hopefully get it right this time. Thank you for all the help <3
35
Test Equipment / Upgrading Rigol MSO5000 Series LCD (Thoughts?)
« Last post by 6E5 on Today at 07:22:42 am »
I'm thinking of purchasing the Rigol MSO5000 series - some of the features that I like are the HDMI out, the built in function generator, the internet and app connectivity, the touch screen.


I am generally disappointed in the quality of the screens though, of oscilloscopes in general. I figure if I'm looking at something that costs more than a phone, it should probably look pretty good.

Has any had any experience upgrading the LCD? At the very least I guess it would be the same to use the HDMI out and somehow extend the touchscreen controller inputs so they can be used externally.
36
I am not so sure of that but in this case, there is no evidence that doublers were used.
You cannot place doublers on gate drive outputs, that's what I mean.
37
Test Equipment / Re: Using a AWG and a Scope -> ADC inaccuracy?
« Last post by HendriXML on Today at 07:21:13 am »
Same sample but with 1800mV amplitude, thus twice as much.

The glitch is of the same height. So if it the error was some sample data, the error should have been doubled.

Looking at the grant picture it seems that the number of glitches seem to have increased. But getting them zoomed in on and in view using Excel take to much time.

Have to think about this. Are these ramps repeated pieces of the same sample "glued" together, but not seamless?
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Test Equipment / Re: A look at the Uni-T UT210E
« Last post by Martin72 on Today at 07:21:10 am »
Quote
100A to 1000A

Hmm...makes it any sense except you can set it to...
39
It is actually a little easier with analog meters where the scale can be made with the proper response to indicate watts.
40
I took a second look to be sure.  There are only two external drivers on the motherboard which is consistent with a 4 phase design using the ISL95712.  Two of the phases are missing anything which could be a driver or phase doubler which is also consistent with the ISL95712 which directly drives two of the phases.

It looks like Gigabyte simply doubled up on the number of inductors placing them in parallel pairs and counted each individual inductor as a phase.

And particular controller chip discussed in the video cannot be used with doublers.

I am not so sure of that but in this case, there is no evidence that doublers were used.  Everything is consistent with a 4 phase design based on the ISL95712 with the expected two external drivers and two phases being driven directly.
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