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And when I’m reconnecting and connecting the RPI Pico again, It doesn’t help, the RPI Pico board doesn’t work then, until I press the bootsel button and upload code with Arduino IDE

Hi, it's normal for the USB to disconnect after the UF2 file had been transferred. That's a sign that the code in the UF2 file is now being executed. Whether the USB reconnection sound occurs however, is entirely dependent on what the code in the UF2 file does. If the code doesn't use USB, or the code is faulty, or the code is intended for a different board, then it's likely the USB port will not reappear, until the whole process is redone, i.e. unplug, hold down thst bootsel button and then plug in again. In other words, it's recoverable. What UF2 file are you using, is it one you created yourself, or downloaded from somewhere?

Hi! Congrats on the MXO 5, please do comment to give your feedback on it when you receive it. That's a very difficult decision, because with power electronics, I can imagine you may well want more than 4 channels. I believe at 500 MHz with 8 channels, the MXO 5 should perform extremely well, because you've got dual MXO-EP ASICs inside, each one is at least MXO 4 power as I understand. And 500 Mpts per channel is a huge amount, I feel more than perfect for your use-case. So that seems like a great combination, plus at least there is a path to upgrade if needs radically change, without changing the hardware. To me that feels a better combination than the 4-ch 2 GHz 1 Gpts options. Both options very powerful of course.

@@shabaz_ Thanks for the reply. Do you foresee a situation where you might need a bandwidth higher than 500 MHz that your current instrument offers?

​@@r_be I actually use an older 1 GHz BW 'scope extremely rarely now that I'm using the 500 MHz BW one. I kind of wish R&S would offer a mode where the time-domain view is visually restricted to the licensed limit (e.g. 500 MHz), but the spectrum view to be unrestricted to the full 1.5 GHz. That would be very neat, but isn't an offered possibility. Still, 500 MHz is very usable. A good use-case for higher BW could be EMC related testing. For some high-frequency use-cases it may be just as easy (and possibly lower-cost) to switch to a separate spectrum analyzer product anyway, if the time-domain view is not essential for a particular use-case (e.g. perhaps some EMC-related tests as mentioned).

Hehe yeah it's confusing at first. Easiest way to see this, is to imagine each "pixel" in the 8x8 grid is really many tinier sub-pixels that get summed. Now imagine each large "pixel" looks out in a cone-shape into 3D space. If the tiny sub-pixels in the center see a reflection sooner than the outer sub-pixels, then the TMF8828 considers the center measurement for that large pixel to be the primary object, and the fringe measurement to be a secondary object. The secondary object can be useful to detect things that are sloped, too, in a similar way. I hope that helps!

@@shabaz_ Very weird and interesting! It sounds like Terrell rotation though I know it has nothing to do with it :) Do you know if it has a name I can google?! or a video that visualizes what you just described...

@@DrN007 I'm not aware of a video about it, but there's a bit more of an explanation in the write-up here of the overall general mechanism that the sensor uses, so hopefully that can help a little bit further: community.element14.com/technologies/sensor-technology/b/blog/posts/time-of-flight-imaging-low-cost-sensing-with-ams-osram-tmf8828-and-pi-pico in the section "How does it work?".

@@shabaz_ Thank you very much!

@@shabaz_ Thank you very much!

Agree, it's amazing how good microwave radar sensors are. I have tried a couple, but didn't record a video unfortunately, but I wrote up some of the experiments here: community.element14.com/technologies/embedded/b/blog/posts/experimenting-with-microwave-based-sensors-for-presence-detection it's pretty stunning what those sensors can do. Regarding optical, I experimented a bit more with the TMF8828, and noticed that if it's pointed directly at a door face-on, then it can detect when the door is opened by about 150mm or more, which is interesting. It's to do with the second object detection, because each "pixel" in the 8x8 grid is actually composed of several smaller sensors, and the TMF8828 can provide two results per pixel if it detects there's something further back. When a surface is slightly angles (which a door will be when it is partly open), those pixels generate two object results, which makes it very quick to determine if the door has been opened. Another use-case which should be very easy for the TFM8828 is to detect when a person is fully centered in front of a kiosk, and can also detect basic gesture detection like which hand is raised, or if they jump up and down.

HI! It can measure distance to 5 meters, however I've not done any accuracy tests yet. It's still a very new project, so testing is limited (I've increased the response speed since the video however). Regarding accuracy, the datasheet shows ballpark +-15 mm for most distances less than about 300 mm, and 5% for distances longer than that.

@shabaz_ wonder if the chip can be overclocked , overvolted or somehow hacked to provide 50m+ range... Even if accuracy goes down, a wider area of operation seems more practical. Thanks for answering 💜 subscribed!

@@fire17102 I think it will be difficult with that device, because there is some coating over the laser to spread it, and a narrower beam would be needed for longer range. However, you got me interested to see what is available for longer range. I saw a module on Aliexpress, which is called "50m Laser Distance Range Finder Moduule" model number HI50, which has a serial interface. That could be interesting to try. I'm tempted to buy it too. It is more expensive though, about $35.

Hi, thank you for the feedback!

Hi! I must admit, I've never known for sure. I've been using steel for a while, but never at production volume. As you say, it's probably wiser to stick with brass for the best tip longevity.

I've only seen gold colored aluminum wool with flat wire like a pot scrubber. I like a wet sponge.

@@A3Kr0n Exposed aluminium will form Aluminium oxide which is highly abrasive. Sponges only are good if you're using leaded solder only and have your tip temperature low, like < 320C. Sponges will cause more thermal shock when the temperature is higher and can create microfractures and pitting in tips.

Thanks for watching! And I appreciate the feedback. I was under the mistaken impression that TH-cam would auto-level the overall audio (it seemed to do that on a few videos) but it didn't : ( and there's no way to re-upload the video without deleting this one (which would break links) so I was forced to keep it this way. I have learned from the mistake and all recent videos have much louder audio.

Thanks for the info! I just took a look, at File->Schematic Setup, and I see there Project->Bus Alias Definitions, and it's possible to click "+" to create a bus definition there such as "LCD" and then in the "Members" column click "+" to add (say) COM[1..4] Thanks for pointing this out!

Hehe yes : ) Fun hearing it play out. I wish there was a version of this board with male sound speech, because I'd like to fit that into this head: th-cam.com/video/uGGOdKMdm_g/w-d-xo.html

Ratsnests*. And to answer myself: yes it is possible.

Hi! That's a GREAT idea. Going to get some bright colored foam. Also, that's a neat idea to use a roller for glue too. I was struggling with impact glue in a tube for the examples in the video, and it was extremely messy and hard to get a neat finish. You can see ugly remnants of dried impact adhesive in the top-right corner of the foam used for the thermal camera near the end of the video.

Hi, interesting, thanks for the feedback! I've not tried to import an EAGLE file with KiCad 8 yet. Good to know if it's been improved in this area.

@@shabaz_ It looks like it. Done it a few times and not had anything have to be replaced on the board.

Thanks for the comments! I think it's time for another MXO 4 video, I'll start thinking about what that should look like. But to give you some feedback now; when the MXO 4 was first released, I raised about 25 issues, and their customer support was willing to accept them all and work through them, and their engineers provided feedback. Some were genuine issues, some were feature requests or more minor feature enhancement requests, and some were misunderstandings from me. Now with the latest release, I think pretty much everything I raised has been resolved; for instance, in the video, you can see that the math capability was originally quite restrictive (to about four or five terms), but that's been greatly enhanced now, so I'll provide screenshots in a later video. Some of the things I was really hoping they would implement, are now present: in particular spectrum log display is executed really well, and also there's now the ability to have 4 different channel spectrum traces simultaneously. One thing that's still missing, but I *think* may become available, is spectrum waterfall. There's also now power measurements + harmonics capability (ideally with power rail and current probes, but nothing stopping using normal probes and sense resistor or a small current sensor). There's also zone triggering which is going to take me a while to explore; it has the potential to identify what part of a waveform is responsible for spurious content for example, by drawing a zone on a spectrum display (doesn't have to be drawn on the time-domain view!). I'm looking forward to trying that (that feature was just released about a week ago).

@@shabaz_ Thanks very much for that very thorough response ! It's especially helpful as I'm JUST about to order one myself next week. I first saw the MXO-5 review by Shahriar on his TSP TH-cam channel which really got me going. Next I convinced myself the MXO-4 is essentially just a four-channel version of the MXO-5 he reviewed with basically the same feature set (it's basically two MXO-4s in one box serving 8 channels instead of 4 with a slightly larger display and a bit more memory). And now your MXO-4 videos and I'm cooked. I just subscribed to your channel and look forward to any further reviews you may decide to do on this. Again, thanks !

​@@shabaz_ So weird; just left a response here but it disappeared when I saved it ! Anyway, thanks for this very thorough and helpful response. I especially appreciate it as I'm just about to order an MXO-4 next week. I saw Shahriar review the MXO-5 on his TSP Channel which got me going, then I discovered the MXO-5 is essentially two MXO-4s in a larger box running eight channels instead of four with basically the same specs and characteristics. I only need four. Then I watched your review and now I'm cooked. I'm really happy to hear R&S has been so responsive to feedback. An extremely good sign. I"m getting to think of R&S as sort of the anti-Tektronix. Super products except honest instead of pathologically mercenary. I've subscribed to your channel and look forward to any further reviews you do. Thanks again for taking the time to do such a great job at this.

@@Starlite4321 Hi! Yes it's weird, I can see you wrote the comments when I log in, but I can't see why they are not appearing. There's no queue/moderation or anything set against the video, so it should just immediately display. Anyway, that's great news, I hope the 'scope gives you many years of great service! It will be great to hear how you get on with it.

@@shabaz_ Thanks for the response shabaz. Computers. Am I right ?

Thanks!

Hi! Nice, e-ink is a great idea. I've been looking at LCD TFT screens, currently trying some larger circular and square TFT with ESP32. But can try to find a suitable E-ink to get functioning at some point. I'm currently documenting the larger TFT experimentation (until I have enough content for a proper writeup/video) in the comments section here: community.element14.com/challenges-projects/project14/timeandspace/a/timeandspace-projects/PR51/starmap-charting-the-stars-with-arduino

Hehe already on it! I've ordered a couple of displays to test out.

Hi! I believe the code would work very well on RP2040, although I've not tried that yet. The starmap library code doesn't mind which Arduino is used, and can also work with RP2040. The starmap_project.ino file contains generic plot_pixel and draw_line functions, and it is straightforward to call any TFT screen function inside there, to suit any display. For instance, the current code calls tft.drawPixel and tft.drawLine inside those generic functions, to suit the Adafruit graphics library. Regarding IMU, that's a great idea. Perhaps, since the chart update takes a second or two, it may be easier to (say) have left and right arrows around the North indicator, indicating which direction to turn, and then the North indicator change from red to green maybe.

Thanks for watching, and the feedback!

Thanks!

it actually works well, after you did it once

Thanks for the comments! Unfortunately the Molex tools are expensive : ( however, there is a 'ServiceGrade' version of the tool, Molex code 64016-0200 which is intended for 28-16AWG Mini-Fit Jr. It's about half the price of the normal tool, but is only designed for a life of about 1000 crimping operations. If it were a low-current non-critical application, you could also consider cheaper non-brand crimpers, but for an oven, it's going to be a high risk, because the cheaper non-brand crimpers will not do as good a job, and the increased resistance will cause heating and could be a hazard. So really the ServiceGrade crimper is about the only option to save a bit of cost, granted it's not a big saving : ( You could sell it on ebay afterwards perhaps to recoup a bit of the money perhaps.

Thanks for the feedback!

Thanks for the comments! What you write is accurate, as you say, the .uf2 file contains the binary content, and it is drag-and-dropped into the USB file system that appears when the Pi Pico is plugged in with the BOOTSEL button pressed first. I forgot to mention the animal sound mixer project, I'll add it into the video description notes.

Hi John, Thanks for the feedback!

Hi Orwa, hehe thanks! Thats's the nicest compliment ever possible for a project!