Hi, thanks. The battery story is continued at www.djerickson.com/hp3466a-dmm I didn't think it was worth another video. Calibration is described in the service manual. It's old-school calibration with lots of trimpots.

I agree, PCBWay and JLC are game-changers. Before that, since about 2005, I used ExpressPCB for dozens of designs, and was happy with their service. I liked their 3 day turn-around. Before that there was a lot of hand-wiring and wire-wrapping. I stopped making home-etched boards in the mid 80s, too messy. Life is good now.

Hi, thanks for the feedback. My advice to repair an inverter, check the FETs for shorts, Caps and diodes for shorts and opens. May be challenging since the transformer is across some of these. It can be hard to remove parts. Check the controller chip for voltages and waveforms. Unless you plan to get it professionally repaired, you have nothing to lose trying it yourself. I did a teardown of a solar grid-tie inverter recently. It may help you since the parts are similar to most inverters. www.djerickson.com/solar Good luck!

Thanks for the feedback. Good idea. F strings were inherited from the SCPI library examples. Teensy is nice enough not to complain about them.

I did the change to Li batteries. It's described on my HP3466 web page www.djerickson.com/hp3466a-dmm. I don't think I'll do a video on it. Thanks for asking.

Hey Pete, thanks. I agree, the ImageFlow team was amazing. I am open to any and all contributions, text, video email, whatever. There are Lots of D3 areas where I am not expert. I plan to dive into ROIs and ROIStores next. Then front ends.

Thanks, you're too kind. I try to do nerd stuff that no-one else does. It limits me to a few videos a year. It limits my audience too.

Wow Dave - you covered the architecture and the wonderful adventure Datacube was so well. Nice work! What a great team it was!!

So true. Or a small GPU can do it. Now industrial cameras are digital or USB.

Thanks for the nice feedback. I was hoping the DIY community could embrace it, hoping I could get some boards assembled for sale. But the parts shortage mine field has made building and selling complex hardware close to impossible. Lead times are out to 2Q2023. The latest issue is Teensy 3.2 and 4.0 availability. It would suck to get boards built only to find 1 or 2 critical parts unavailable. Meanwhile, doing firmware updates and Python code are a possibility. I'll resume firmware work this winter. I have 4 fully working units, and willing to give away 1 or 2 to someone who wants to do some Arduino / Teensy coding or Python application code. Also I'm also looking towards upgrading my other projects: 18b DAC, and PS-Load.

@@ericksonengineering7011 yeah the part shortage has been a real slap in the face. Hopefully things get worked out, because it's affected so many random things that folks wouldn't even think of. Your SMU is one of the most well thought out and executed projects I've seen on KZbin in a long time. A lot of times folks will start something incredible like that and then just drop it in the middle of the project. (Like Marco reps and his open source measure unit) 😂. But I'm holding out hope maybe he'll pick it up again one day in the future he has all the boards and things.

Hi, and thanks!. Sweeps and breakdown testing could be done via SCPI commands over USB, and a Python program on a PC , no? I assume for breakdown testing, you increase device voltage and look for a rise in current. Is 0 .1 to 0 .5 second response time fast enough? If so it will do that now.

@@ericksonengineering7011 That would definitely work!

Where is this "text explaining how to adapt them" online? PLEASE - I want to do so like wise!!!

@@joeteejoetee Go to Dave Ericson engineering He made a you tube video explaining how to do this.

Plotter basics are working now, but changing pages deletes the old data. That needs some work. You can plot externally in Python, that works very well. The sample rate of the ADC is a few samples per second currently. ADC speed is currently just a constant. Needs a SCPI command to set the ADC rate / NPLC. I'm always measuring both the force and measure, and toggling ADC channels slows the ADC down about 3x. I need a mode to select and display just the measure channel. I still need to make the ADC reads non-blocking and come up with a proper SCPI trigger scheme. There hasn't been a whole lot of interest, so improving the software hasn't been my top priority. Thanks, Dave

Good question. I'm working on the Rev2 Main board and Rev3 Amp board, hopefully these will be rework-free. I could supply assembled and tested boards and front panels as a start. Is there interest?

@@ericksonengineering7011 I would definitely be interested. You could also check @marcoreps 's audience for more reach

I'm interested.

I just found this project and I'm also interested. I bet my maker space friends would also be interested.

i check back to this project regularly to see if you’ve updated anything and not sure how I missed this comment. But yes there are a lot of folks interested especially since Marco reps hasn’t published his open source SMU design. I totally understand that he doesn’t really need it now that he has sponsors giving him crazy nice metrology equipment ... but there are a lot of folks out there that could really use something like this. And from the designs and files I’ve seen of Marcos… They are incredibly well designed. if he isn’t going to finish the design maybe you could get the boards and relevant info from him to implement it in your own design or just to see how someone tackles it with different methods. Would definitely Be interested in both populated/testing boards and blank boards/component kits. I visit your site and videos regularly to check for updates but also just to go over the info again. It is very enjoyable to me to see how you tackle this problem with all of the different implementations and how it evolves. I reread everything regularly because it's a lot of fun… And you did a lot of work and a great job!

Thanks, I'll fix it.

Yes, definitely. I'll post it when I do.

Check out the new github page at github.com/djerickson/diy-smu It's a start. Let me know if it's OK. Thanks, Dave

OOPS! You'd think that either the editing SW or KZbin's processor would catch this. I fix!