Recent Posts

1

Projects, Designs, and Technical Stuff / Re: Connectors for Breadboard and PCB: GPS module EM-506

« Last post by Solder_Junkie on Today at 07:59:43 am »

 You can buy kits of those type of connectors from eBay and Amazon, measure the pin spacing to make sure they are the same. Crimping tiny connectors is challenging though, I have damaged quite a few pins when crimping and now use a mixture of solder and crimp tool...

In my GPSDO projects, I have used GPS boards which include a micro USB socket. It makes testing/configuring much easier.

SJ

2

Test Equipment / Re: Hacking the Rigol DHO800/900 Scope

« Last post by AndyBig on Today at 07:57:14 am »

Or maybe they don't care. Who is brave enough to run the experiment? 

Two months ago I gave here a link to my github

If you want more space for waves, you can use full screen mode. 
I have taken a picture of the oscilloscope and not a capture so that you can see that it is not a clipping.

Have you switched somehow between full screen mode and normal mode while working? Or is it a separate full-screen version of the application?

3

Test Equipment / Re: Hacking the Rigol DHO800/900 Scope

« Last post by mrisco on Today at 07:56:34 am »

If they used GPL code, then they must release the source code of the entire project, and can't restrict the use of the code.

4

Beginners / Re: New multimeter, is the thermometer good or better standalone?

« Last post by Solder_Junkie on Today at 07:52:35 am »

Thank you for all your answers, I bought the UT890D+, a bit cheaper than the UT89XD with no big diferences, and will bout the TM-902C or something similar later.

Beware the UT890D+ doesn't meet any kind of safety standards, a 5×20mm glass fuse (which they appear to use from the user manual) is not safe in high Voltage/current circuits, not even on mains Voltage.

For not much more money you could have bought a Brymen meter, which is certified by the US Underwriters Lab (UL listed) and as recommended (and sold) by Dave Jones (Mr EEV).

This is from the BM235 user manual, I have one of these meters:

Safety: Certified per IEC/UL/EN61010-1 Ed. 3.0, IEC/UL/EN61010-2-030 Ed. 1.0,
IEC/UL/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and the corresponding
CAN/CSA-C22.2 regulations to Measurement Categories:
CAT II 1000V, CAT III 600V and CAT IV 300V AC & DC

SJ

5

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

« Last post by ebastler on Today at 07:49:56 am »

Let's see whether they are brave enough to distribute this hack (and other related ones). The DHO1000 hacking took a similar approach of decompiling and patching the executables, back in December. I keenly followed that effort, since I had a DHO1074 at the time and was hoping to see the 50 Ohm inputs and 400 MHz bandwidth enabled.

Back then, the developer(s) never made their modifications available to others and eventually pulled the plug on that effort -- due to legal concerns in my understanding. Rigol does explicitly forbid reverse engineering and decompiling in their license terms. Of course we have not seen them act on this, but who is willing to run the experiment?

6

Test Equipment / Re: Hacking the Rigol DHO800/900 Scope

« Last post by shapirus on Today at 07:48:23 am »

It will be a crime not to share
BTW, it's better to keep decompiled sources in git rather than an assembled .apk

It's an interesting question what Rigol will think and possibly do about this. Hosting copies of their copyrighted binaries on a public server is probably violating license terms already. Hosting and sharing decompiled sources might be beyond their pain threshold?

Or maybe they don't care. Who is brave enough to run the experiment? 

You may not resell, decompile, reverse engineer, disassemble, or otherwise convert the Software to a human perceivable form.

https://int.rigol.com/announce/terms

That's a good point. Legally, it's questionable at least.

Well, it then could be a private repo with access for trusted forum members .

Another option would be to keep only diffs in the repo.

7

Projects, Designs, and Technical Stuff / Re: DIY Digital Caliper

« Last post by ali_asadzadeh on Today at 07:46:47 am »

You can find it in BluePillCaliper/Hardware /Footprints - KICA

There is only footprints, Kicad project files extensions is like this .kicad_pcb .kicad_pro .sch unless, I'm missing something :'(

8

General Technical Chat / Re: Looking for reverse osmosis with less than 25% waste

« Last post by m k on Today at 07:45:14 am »

How much per day?

You can always recycle it and hope that your tank is concentrating the heavy stuff.
Shaping the tank and creating a vortex in it may help.
You must also measure what you get so few more sensors are probably acceptable.

9

General Technical Chat / Re: Why don't we make [more] use of water wheels?

« Last post by soldar on Today at 07:43:36 am »

I have spent the last few weeks roaming about in France and in Provence I saw many waterwheels but none in use. Originally they elevated water or provided motive power for mills or factories. None are in practical use any more. They are kept only as tourist attractions.  Since the wheels and water canals are already there you could think they could be easily adapted to generating electrical power but it looks like it just isn't worth it.

https://www.google.com/search?&q=waterwheels+in+provence

10

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

« Last post by Fungus on Today at 07:39:57 am »

Somebody just added a full screen mode to the Rigol... 

https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/msg5471431/#msg5471431