Recent Posts

1

Other Equipment & Products / Re: Any opinions on the Aixun T420D?

« Last post by Astray on Today at 11:42:52 pm »

This is exactly what I was looking for! Any chance you could make it this a bit more detailed by highlighting changes you made in all photos and explaining why you did what did?

Also I'm impressed you were able to get the device for so cheap. The cheapest I could find before aliexpress coupons was $210 for a T420 with single C245 handle.

Did you purchase a C115 handle version (T405) (which I saw for around $170 on the store you mentioned) and then bought a separate C245 handle?

2

Repair / Re: Simpson 260 series 6 repair

« Last post by flashthunder on Today at 11:38:46 pm »

I am using a 50ua constant current source and injecting into the 50ua jack. I have checked the diodes (both good) and also disconnected the varistor. I have @260mv across the movement and I can change that voltage via the R2 potentiometer, however I just cannot seem to get full scale deflection with 50ua. At this point I am thinking that possibly the magnet has lost some of its magnetism as the meter will fully deflect, but only with 56-57ua.

3

Security / Re: Microsoft repackages apps with a telemetry .NET wrapper

« Last post by SiliconWizard on Today at 11:37:05 pm »

4

FPGA / Re: Help on translate schematics to Verilog.

« Last post by ataradov on Today at 11:21:37 pm »

Code: [Select]

wire out = ctrl ? ~in : 1'bz;
Keep in mind that in a likely scenario of an FPGA, this only works for I/O pins. There is no tri-state logic inside the fabric. For custom silicon it is possible to have tri-state logic, but it is not common.

Code: [Select]

wire out = ~((a & b) | (c & d));


5

PCB/EDA/CAD / Re: High current traces meeting small component legs

« Last post by Doctorandus_P on Today at 11:20:16 pm »

Also, the pins of such IC's may be narrow, but they are also much thicker then the 35um of a "regular" PCB. High current PCB's often also have thicker copper.  And it also helps to have wide copper close to the pin. It helps as a heatsink, and this is commonly also used for power electronics that dissipate power (Linear voltage regulators, class A/B amplifiers, etc).

6

Test Equipment / Re: Siglent SDS3000X HD and upgraded SDS1000X HD

« Last post by KungFuJosh on Today at 11:17:29 pm »

I just tried the new software released by Siglent sigscopelab.

But this software seem to require some work.

It needs a lot of work, but it's free (at least for now). I tried it with my SDS2504X+, and it worked pretty well, but putting the scope in 10 bit mode made it crazy.

7

Test Equipment / Re: TinySA Ultra launched

« Last post by KungFuJosh on Today at 11:15:53 pm »

I vote @shapirus reports the bug, he found it, I was just confirming it.

Here's a clean sweep for comparison with the same setup, but using the SDG2122X:



I wish Siglent would have a full frame rate option for the web console.

8

Test Equipment / Re: Siglent SDS3000X HD and upgraded SDS1000X HD

« Last post by temperance on Today at 11:07:24 pm »

I just tried the new software released by Siglent sigscopelab.

But this software seem to require some work.

-Setting the time base cycles the time base on the remote device between 1 s, 2 s, 10 ns instead of following the required setting.
-The application frequently freezes, a command window appears and disappears.

I didn't do any further tests.

Also, this is a free version. I hope they are not planning to release sub standard node locked pay ware like other brands do.

9

Projects, Designs, and Technical Stuff / Re: Vacuum Fluorescent Display Driver

« Last post by bostonman on Today at 10:48:53 pm »

I scoped G1 and it had many more pulses than G2 and G3, so I moved forward with replacing the chip.

The good news: the new chips seems to have fixed it. Can’t say for sure, but I didn’t see digit twelve have the lit segment. I wanted to see if it displayed AUTO TRIG or AUTOOTRIG (somewhat of a true test), tried pushing the menu options, accidentally got it in count mode where it was counting pulses, so I turned off power and repowered it to get the default stage.

The bad news: when it repowered, the display may have come on for a split second (I wasn’t staring at it) and vanished. LEDs light and got a brief moment I saw a faint sign of life on the display where it showed something.

I didn’t move anything, nothing was near it to short, etc… Just a simple repower.

FL1 and FL2 measure 5.8v DC, so I’m assuming the supply blew, but don’t know why.

10

Test Equipment / Re: Siglent SDS6000L 2GHz, 4-8 Ch Low Profile Digital oscilloscope serie

« Last post by tautech on Today at 10:47:31 pm »

New firmware for SDS6000L models.

Version： V1.0.7.8
98 MB
https://int.siglent.com/upload_file/zip/firmware/Oscilloscope/SDS6000L_1.0.7.8_EN.zip

Release notes
1. Fixed several bugs
a) Cannot exit from Bode plot in some case
b) Cannot detect active probes correctly when the probes are connected at power-on
c) “Set to 50% level” takes the scope frozen in some case
d) Sample rate is displayed incorrectly after reboot from Fixed Memory Length mode