Recent Posts

1

Test Equipment / Re: Hacking the Rigol MSO5000 series oscilloscopes

« Last post by BTO on Today at 02:40:42 am »

What does the press of the "Single Button" at the startup do? Is there a manual/tutorial on this?

Try it and you'll see. Pressing single brings you to the bootloader which allows upgrade/downgrade of the firmware and reset to factory defaults.
Normally you can only upgrade in the regular scope app.

I'm planning on getting to the bottom of why people are having so much difficulty getting through this process so..

Question : I have no problem getting into the Pre Boot menu and to the options of Default and Firmware upgrade.
Although i see 2 issues arisiing here

1. A lot of people are saying that DEFAULT takes you back to the original firmware version and locks all the unlocked options, that's not actually true. I did it last night.
   Default just (seems to) Take your scope back to default settings, so if you had a custom setup file as i do, it changes the settings back to default settings

2. AS FOR THE DOWNGRADE...
Firmware upgrade doesn't actually downgrade the scope, I read from a forum user to first run DEFAULT (and i did) and then to load 1.3.2.2 onto usb then run the firmware upgrade from the preboot menu
(and i did) it failed  I have tried 3 different 1.3.2.2 files on the forum and they all fail

Note : My scope is on 1.3.3.0  with all options unlocked with the Patch

ANY IDEAS

So if we break this up into stages (AND I'D LOVE TO HEAR FROM DR MEPHISTO)
Stage 1 - Getting into the Pre Boot Menu  .. Piece of cake - DONE
Stage 2 - Getting my scope down from 1.3.3.0 to either 1.3.2.2  or if needed 1.3.0.3  ,  Not able to do that yet

ANY IDEAS

2

General Technical Chat / Re: Questions about Adelaide Australia

« Last post by SmallCog on Today at 02:34:57 am »

I hope you enjoy your time here (I'm from Adelaide)

Not 100% sure about groups, I think there are but their names are escaping me. My only involvement with a group is with a local repair cafe. Have a google for "Maker" groups in Adelaide perhaps.

Brick and Mortar stores:
Altronics, about 10min drive north of the city centre, are my go to shop.
Aztronics, in the city centre, they're a little independant shop I've only been there a few times.
Jaycar, they do carry components, enclosures, etc but I prefer Altronics. They have a bunch of stores in Adelaide including in the city centre

Overnight delivery is hit and miss in Adelaide, options include Element14 (also known as Farnell) and RS Comonents. I also use WES however you'd need to open an account first so they may not be an option for a short term visitor.

3

Test Equipment / Vevor SDS1104 for first oscilloscope?

« Last post by help_me_pick_username on Today at 02:28:41 am »

Hi,

I'm currently looking for a first oscilloscope. I found the Vevor SDS1104.

4 Channels, 100MHz 1GS/s at about $320, this seems like a decent deal? Obviously it seems to be a no-name brand, but spec wise, looks ok. I found this unboxing on YouTube (), and it looks ok at first glance.

There doesn't seem to be many proper reviews of this so wanted to know what you guys thought. Any suggestions would be appreciated.

Purchase page: https://www.vevor.com.au/oscilloscopes-c_12405/vevor-digital-oscilloscope-1gs-s-sampling-rate-100mhz-bandwidth-portable-oscilloscope-with-4-channels-color-screen-30-automatic-measurement-functions-for-electronic-circuit-testing-diy-p_010228231720
Amazon: https://www.amazon.com.au/VEVOR-Oscilloscope-Bandwidth-Measurement-Electronic/dp/B0CP7Z1V56


Thanks

4

Buy/Sell/Wanted / Re: FREE: Electronics Australia, ETI, AEM Magazines

« Last post by Brumby on Today at 02:25:43 am »

In discussions with them.

5

PCB/EDA/CAD / Re: JLCPCB alters soldermask without any notice

« Last post by JLCPCB Official on Today at 02:06:14 am »

Thank you for your feedback! I’ll forward this to our support team. If necessary, feel free to provide your order number, and I’ll look into it with our engineers.

6

General Technical Chat / Re: new propellantless drive company

« Last post by Alex Eisenhut on Today at 02:05:28 am »

Buttered toast strapped to a cat?

7

Projects, Designs, and Technical Stuff / What FCC certification test that I need to pass for project that I am working on

« Last post by mgwalker95 on Today at 02:01:00 am »

Hi,
I am working on a wireless charger that is also a wireless receiver(https://www.reddit.com/r/hwstartups/comments/1cbdw74/comment/l0ykgl9/), but I am not sure what FCC testing that I need to do to sell in the US. What where should I be looking? Should I contract it out? Can one of point me in the right direction? Also any feedback on the project is much appreciated!

8

Vintage Computing / Oregon Trail : The story behind the creation of the classic computer game.

« Last post by BrianHG on Today at 01:59:13 am »

It's long, but still a big piece of computer gaming history...

9

Buy/Sell/Wanted / Re: SALE (AU/NZ): Multicomp Pro MP710086 (Owon P4305 rebadge) at element14

« Last post by EvgenyG on Today at 01:57:38 am »

Looks like they are selling quite a few other PSUs as well.
Any thoughts on this one? https://au.element14.com/gw-instek/gps-3303/power-supply-3-o-p-3a-30v-fix/dp/274852202
Seems like a very good deal.

10

General Technical Chat / Re: Do you think an LED is a resistor?

« Last post by bdunham7 on Today at 01:56:14 am »

In order to be able to use nonlinear resistors effectively in a practical design, it is necessary to understand some basic properties.We will illustrate these properties by considering a prototypical example of a nonlinear resistor, the pn-junction diode (henceforth referred to as diode). Although we model diodes as nonlinear resistors, they are so important in circuit theory that they have their own symbol[...]

Um, yeah....I think they're right about that....hey, I think we have these things called linear resistors, also known as 'ohmic', and don't they have their own symbol and all that?  We call them, um, er, it's at the tip of my tongue....