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General Chat / Re: Why are pins on a component placed so awkwardly?
« Last post by NANDBlog on Today at 08:48:50 PM »
How do people route stuff? Is there some rules, tips and tricks I need to learn? How do I learn it. I have tried placing the components closer, farther, rotated 45 degrees, created GND planes but nothing works for me. Is is not possible to make single sided 26mm x 26mm single sided PCB at home? I am very frustrated.
How do people route? Where do I learn to route?
Not on 1 layer. Yes, usually default rules in your PCB designer software should be a good start for rules.
You learn by doing it, or watch Dave's video routing his nixie clock.
Yes, you should not design single layer SMD boards. Just dont. Its like trying to power an Audi A8 with a tuk-tuk engine. Even if it works, it is not OK. Also, capacitors? Did you learn nothing from Dave's videos? If you see a teardown of a product and it has a billion small capacitors, do you think your watch is not going to need it?
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General Chat / Re: What did you buy today? Post your latest purchase!
« Last post by beanflying on Today at 08:47:05 PM »
Nice Toy @CalMachine  :-+

It had been nearly 2 days since I brought something so I brought a bit of Crap on Ebay  :o A Power Supply that requires Interlock Switches and Counters will be fun to play with. I did really buy it for the nice modular case to mount so other stuff in but should be fun to pull down and get a few cool parts from. $60 AUD delivered btw.





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General Chat / Re: New AMD Ryzen Threadripper Editing Machine
« Last post by TheAmmoniacal on Today at 08:46:51 PM »
The software is clearly the bottleneck here, not the hardware. Ask the developer what hardware they recommend.
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General Chat / Re: Earphone cable wire question
« Last post by Someone on Today at 08:45:58 PM »
Its an artists impression, not an accurate image and simply marketing nonsense puffery as it literally cannot be lossless. Many headphone brands have been using kevlar/aramid reinforced cables as the protect the copper so it fractures less often.
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Test Equipment / Re: SDS 1202 X-E I2C triggering bug
« Last post by Performa01 on Today at 08:44:24 PM »
Thanks for the screenshot. There are many factors which may affect the result i.e. why it worked for you and does not work for me. For example the version of the used firmware (mine is the latest), different hardware and such.
The I2C setup is pretty simple on this o-scope so I am 100% sure everything is done correctly during my test.

Looking at your screenshot I am curios what those "~A" characters at the of each data string means. I don't see them on my screenshots. But assuming that "A" stands for acknowledgement the situation is even more weird.

...

PS: I am not sure why I see on your screenshot the first record in the table with decoded data: your trigger is set up to trigger on writing bytes 0x89 & 0x9A to a slave with address 0x2. First record means reading from the slave with address 0x4 several bytes which have nothing to do with  0x89 & 0x9A.  Should the decoding start from the line 2  ?

My screenshot is from the latest (currently one and only) firmware V7.6.1.12 – this information doesn’t help much as the firmware for SDS1x04X-E has lots of additional features, hence version numbers are quite different to the SDS1202X-E. Nevertheless, the I2C decoder shouldn’t be very different for the latest firmware versions for both scopes.

The “~A” character at the end of the decoded data strings actually means No Acknowledge. However, the current I2C decoder has a known bug; it might misinterpret the last acknowledgement at the end of a longer message as “no acknowledge”. We haven’t seen this bug with single byte messages yet and your decoding looks as it should. The acknowledgement in your messages is indeed correctly recognized by the scope.

A serial trigger can only fire after analyzing the address (and first up to two data bytes, depending on the trigger type and settings) of a message, which in turn means it has to receive this part of the message first. So it comes as no surprise that the triggered message starts before the trigger point, hence gets a negative timestamp (timestamps in the list are always relative to the trigger position).

It depends on the trigger position how many messages you see before the trigger event. As you can see, I have set the trigger position rather far to the left of the screen (68ms delay) so that I get only one additional message before the triggered one.

Apart from all that, I have no idea why the data trigger appears to fail in your setup. Maybe there actually is a bug in the SDS1202X-E that has been corrected for the SDS1x04X-E already. I would check that for you, but can do that only at the weekend, as I have no access to my lab during the week.
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I hate Javascript with a passion.  It's a rubbish language that was never intended for it's purpose, based on out of date techniques that grew warts, heads, arms and legs in all different directions and has only recently be 'tamed' in any way at all.  Mostly due to VERY heavy compatibility frameworks behind things like Angular and React.

You're talking complete bollocks. And again, Javascript != DOM.
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Repair / Re: Repair Keithley 6517A
« Last post by Le_Bassiste on Today at 08:40:13 PM »
this one may do the trick:  NDFPD1N150C
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I think you have picked a pretty impossible task. SMDs really only work with 2 layer boards. If you have a lot of PCB space then you could arrange to use some wire jumpers to simulate another layer, but if you want a small PCB area then you really need multi-layer.

For DIY, you might consider etching two 0.8mm PCB and sticking them together. Personally I would just order boards from China...
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General Chat / Re: New AMD Ryzen Threadripper Editing Machine
« Last post by NANDBlog on Today at 08:40:11 PM »
Threadripper 1950X, Nvidia GTX 1080 Ti GPU. Rendering your 2 min sample project.

MAGIX AVC/AAC MP4, Internet HD 1080p 50 fps (Nvidia NVENC): 1:14 minutes

Wow, thanks. That confirms it, a new Threadripper machine would be a waste of money.
Mine is a tad faster than that with the GTX-1050ti
BTW, by CPU (dual Xeon) runs about 50% using NVENC.


Also, I'll be damned, Magix fixed the exact XSplit audio bug that was preventing me using Vegas 15:
https://www.vegascreativesoftware.info/us/forum/vegas-pro-15-update-2-build-261--109529/

I find it remarkable that the program has to support all these different program outputs. Isn't MP4 fairly universal?
Well that is a simple case, when moar cores isn't better.

I guess you should take a look at the Core i9s then? They had terrible motherboards. The early units did not have VRM strong enough to power the CPU.
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Test Equipment / Re: Instek GDS-2072E front end cal
« Last post by nctnico on Today at 08:39:35 PM »
These trimmers are most likely to adjust the low frequency response (there is little other reason to put a trimmer in a modern oscilloscope frontend). In the end there is only so much you can do to get a fast pulse into a very capacitive 1M Ohm input.
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