Recent Posts

1

Buy/Sell/Wanted / Re: FS (EU/US) PHV 1000 100:1 400MHz High Voltage Oscilloscope Probe

« Last post by HighVoltage on Today at 05:17:52 pm »

I am surprised they can ask so much for a 100:1 probe.

But then, all prices have increased like crazy.
Not long ago, we could buy a real high voltage probe for that amount.

2

Test Equipment / Re: SDS800X HD Wanted Features

« Last post by ebastler on Today at 05:16:04 pm »

I really hope that nobody actually believes that the Siglent development team will sit down, leave everything else behind and work through the lists.
For a device with a starting price of 359€....

As you said, it's a list of suggestions. I don't think anyone expects Siglent to implement more than a few hand-picked ones. Given their software platform strategy, I would hope that they do pick a few UI improvements which are beneficial across the whole touch-screen scope range -- so the effort would not need to be justified through SDS800X HD sales alone.

3

General Technical Chat / Re: Is LinkedIn worth keeping?

« Last post by coppice on Today at 05:14:30 pm »

Look at Google+ crash and burned, you have a couple trillion $ market cap yet are totally impotent. Why?
Mega corporations can't do it. They aren't in it to make it good or to better society - it's about their hidden agenda towards data mining private information, all in the name of "advertising". Or maybe it's social control, influencing voters - who knows. Lemmings do not jump off the ice pack!

Google is easy to explain - inconsistency. They have spent 20 years starting things, finding they aren't taking off, and killing them. No fixing. No migrating existing users to their next iteration of the concept. just dead end after dead end. Some of these are markets they didn't give up on, like VoIP. They started and killed several attempts at that, with no follow through from one try to the next. They can't seem to understand the concept of a pissed off customer. Their cloud services were a disaster when they tried to offer clever ones, with lots of Google specific "value added". Then they hired someone with a functioning brain who offered basic cloud services, which were easy to migrate into and out of, and their cloud stuff took off. Nobody wants to buy in too much to anything proprietary from Google these days.

4

Microcontrollers / Re: $0.11 PY32F002A: Cortex-M0+ MCU, actually a PY32F030! 32/4KB, 48MHz, PLL, DMA...

« Last post by IOsetting on Today at 05:11:57 pm »

I doubt 002b also supports "Super Deep Sleep" but I didn't test it.

it's very likely that 002B is an equivalent of L020, I just run the Deep Stop example on a TSSOP20 PY32F002b, the current consumption is much lower than the Stop mode ( 0.6 uA vs 1.6 uA).

5

3D printing / SLA print warping

« Last post by strawberry on Today at 05:09:28 pm »

warping happen after some day. like some internal stress???uneven printing temperature?? it comes out almost perfect but then it is meh
I broke one sample but got worse(couldn't put peaces back)
one sample came out fine

wall thickness 3mm L=200mm H=30mm box
acrylic resin

6

Test Equipment / Re: Choosing between entry-level 12-bit DSOs

« Last post by gf on Today at 05:08:09 pm »

It sounds a little bit comical indeed when a 200 MHz instrument is demanded to “see” a 500 MHz signal.

No, not really

But I'm still wondering how 490 MHz @1GSa/s and 10ns/div look like?

7

Test Equipment / Re: GW Instek GPP-4323

« Last post by Eric-H on Today at 05:07:49 pm »

There is another bug in firmware version 1.23 on my GPP-4323. Channels 3 and 4 show no voltage and current setpoints when selected. When you turn these channels on, they do output the last voltage.

I reverted to version 1.21

8

Beginners / Amphenol GT series connector - help with rewiring

« Last post by tohtorizorro on Today at 05:06:36 pm »

Hi!

I was asked to make a cable between a mixing desk and its external PSU. The owner of the desk wants to locate the PSU +10m away due to fan noise and the current cable is only about 3m long. According to him the manufacturer would charge nearly 5k€ for a 15m replacement so I thought yeah, I might be able to do it just a smidge below that 

The cable has Amphenol GT series connectors. Probably due to their wide customizability, they are not kept in stock and have a factory lead time of 16 weeks. Changing the connector type isn’t really an option either since I doubt the owner would allow it and it would probably be a lot of work at the desk end. So, preferably I'd be able make do with the connectors on the original cable.

It took me a good while to figure out how to even screw the shell open and now I would really like some encouragement before I start to mess more with it.

Here are the instructions I found for soldered connectors: (page 51 on this PDF)

• Slide the rear accessories over the wire bundle in the proper sequence for re-assembly:
  cable clamp and/or endbell first, then ferrule and (if used) coupling nut.
• Insert individual wires through the proper holes in the grommet.
• Solder wires to appropriate contacts on the rear of the connector
• Fixture the connector for reassembly using the endbell assembly tools
• Slide the grommet down the wires
• Slide coupling nut, ferrule and endbell accessories over rear of the connector and tighten.

So, it sounds like the pins are fixed to the connector (as opposed to crimped ones which are inserted and extracted with a special tool) or are they meant to be replaced before soldering the new wires?

If they are fixed, can I just remove the old wires, clean the contacts and resolder new wires in a similar fashion as with XLR/Socapex connectors?

That would be great!

9

Other Equipment & Products / Re: Dymo 550 Thermal Printer DRM Hacking

« Last post by js_12345678_55AA on Today at 05:06:05 pm »

Tested all 12 of em. All of them are still in memory.

Btw, there are 2 typos in slix2_tag_emu 11. Missing a couple commas. Not that it matters to this case.

I have added 5 more SLIX2 UIDs and their signatures for testing.
If we're lucky, DMO will only remember the last 16.

@RethoricalCheese: Could you please test them as well?


In case DMO remembers more than 16, well, then...

*W*E*L*C*O*M*E* *T*O* *R*O*U*N*D* *2*

Challenge accepted DMO!

I just read a very nice write up the other day about breaking STM32 RDP level 2 and level 1 protection:

https://sec-consult.com/blog/detail/secglitcher-part-1-reproducible-voltage-glitching-on-stm32-microcontrollers/

As luck would have it, I have a ChipWhisperer lying around 

So stay tuned.

JS

10

General Technical Chat / Re: Is LinkedIn worth keeping?

« Last post by floobydust on Today at 05:05:09 pm »

LinkedIn china shut down recently, August 2023, cut 716 jobs. Microsoft seems to have put their LinkedIn effort into china - the social media function was banned in 2016. Several years and dollars wasted on the InCareer app.
Fixing LinkedIn in the West, can't see it happening. I found "LinkedIn Mastermind Club is an AI-integrated online community portal for professionals to learn and connect." Sounds super creepy. Who needs HR when the AI can do it lol.

Look at Google+ crash and burned, you have a couple trillion $ market cap yet are totally impotent. Why?
Mega corporations can't do it. They aren't in it to make it good or to better society - it's about their hidden agenda towards data mining private information, all in the name of "advertising". Or maybe it's social control, influencing voters - who knows. Lemmings do not jump off the ice pack!