Preparing EEZ H24005 for crowdfunding

[prasimix]

could you show the high frequency noise ?

I hope so, what I need to do?

[sdouble]

my only concern is the noise level.
Could you show  scope pics at 5 V output , 50 ohms load, 10 us/div and 200 ns/div ?
at least 50 MHz scope BW ? 2mV /div if possible.

[prasimix]

my only concern is the noise level.
Could you show  scope pics at 5 V output , 50 ohms load, 10 us/div and 200 ns/div ?
at least 50 MHz scope BW ? 2mV /div if possible.

Hm, not so sure why you need this and what kind of circuit you'd like to power. Without bandwidth limitation (@70 MHz) it seems that nearby SPI signaling become visible (marked red). Ok, maybe I should put some resistors with small values in series to attenuate SPI signals.

[Tazz]

put some resistors with small values in series to attenuate SPI signals

Proper digital line impedance adaptation inside all the supporting logic of the PSU is a painful but necessary tuning step to minimise noise. It is always better to not generate noise vs have to filter the noise later.
Nevertheless the results of this PSU are already very good.

[sdouble]

thanks prasimix

[garnix]

According to your screenshot you might have used the probe in 1x mode - so this limits the bandwidth to 7 MHz on the scope side, no?

[prasimix]

I'm not using ordinary probe. Please read once again some of previous posts. But, I don't know what is bandwidth in that case.

[mrpackethead]

Congradulations on hitting your target.  Your live. How does it feel.

[Kean]

Well done on reaching the goal!   

I am hoping to order a second complete unit, but I've been waiting for a client to pay me.  I thought I might be the lucky one to get you over the line... 

[prasimix]

I wish to thank you so much for your support :hug: (sorry, no icon associated). Stay tuned and I'll inform you here and via campaign subscriptions about manufacturing details that should start in coming days.

I really do believe that backers will like what they'll get and continue to get without paying for unlocking firmware nor spending nights trying to hack it or e.g. wondering what some IC with identification markings removed by laser could be . All of you who pledged just for bare PCBs keep in mind that I'll try to assist you as much as I can, and don't be afraid at least two people succeed in that small adventure.

[prasimix]

We still have over a month left in the campaign, so there’s plenty of time to exceed our initial goal and hit some stretch goals. Please take our survey to help determine our stretch goals.
Many thanks in advance.

[timgiles]

Fantastic news and well done.

I wont be placing my order until the 25th - wonder how many more will be placed before the end date. Nice selection of stretch goals as well.

[Kean]

I know there is quite a way to go before you've completed this project, but I'd love to see other EEZ Open test equipment in future.
Maybe a programmable electronic load with similar cool features and user interface in a matching enclosure.

[edit typo]

[prasimix]

I know there is quite a way to go before you've completed this project, but I'd love to see other test EEZ Open test equipment in future.
Maybe a programmable electronic load with similar cool features and user interface in a matching enclosure.

One step at the time . A lot of things will be possible to reuse from this project for further T&M devices, and the most valuable thing that came out of this project is firmware and software tools. On the hardware side I started initiative for DIB that is currently on hold, but I have not given up (not at all!), and hopefully we'll see how number of T&M modules will start to grow in the future.

[Kean]

Yay, I finally got paid for a research project so I've ordered a second unit - just don't tell anyone 

[prasimix]

Yay, I finally got paid for a research project so I've ordered a second unit - just don't tell anyone 

[prasimix]

A short version of latest campaign update: the survey is now closed, and I want to thanks to all participants (250+). I got a lots of idea what can be done in the future. But some of them could be easily (and finally?) added into current design and that is mechanical (placement on the PCB) and firmware support for encoder . That is a first stretch goal that I can say with confidence that will be reached, firmware development for adding encoder is almost completed and I'm going to show that soon in a new video.

[timgiles]

Order placed for the PCBs and Enclosure, might change the PCBs to the modules, not sure yet.

Anyone know if you can change an order? Seems to suggest it but the website tools dont and the website has little or no info for customers... IMO anyway.

[prasimix]

Order placed for the PCBs and Enclosure, might change the PCBs to the modules, not sure yet.

Anyone know if you can change an order? Seems to suggest it but the website tools dont and the website has little or no info for customers... IMO anyway.

Please ask that using campaign Ask a Question form that people from CS can assist you.

[Tazz]

Do you know what would be the cost to add for simple (not industrial grade) metal stencils for the PCBs ?

[prasimix]

Do you know what would be the cost to add for simple (not industrial grade) metal stencils for the PCBs ?

Have no idea, I never used it and until now successfully mounted everything with hand soldering (hence BOM does not include QFN, BGA, etc.). I can ask PCB manufacturer what that could be.

[Kean]

Do you know what would be the cost to add for simple (not industrial grade) metal stencils for the PCBs ?

Might be easiset if Polyimide stencils are made available through OSHstencils.com
The final designs can be uploaded just before PCBs are shipped, and links for ordering made available to those who are doing their own assembly.

[prasimix]

Yes, I can do that and the final design will be definitely different from what is currently on the Github because of encoder on the Arduino shield (Stretch Goal #1 that was reached yesterday), relay on the AUX PS and maybe even dual range current option on the Power board.

[Kean]

Oh, I just noticed Tazz asked for metal stencils.  Those would generally not be worth the cost unless you're building a batch, but OSHstencils can do stainless steel (unframed) as well.

[Tazz]

Polyimide would do the job too. Your OSHstencils.com suggestion is great !
It is still interesting to know what the pcb manufacturer of prasimix would charge for.