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    Natural Sciences

    The Amp Hour

    The Amp Hour is a weekly conversation about electronics and the people who design them.

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    Copyright: Copyright © The Amp Hour Electronics Podcast 2020

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    Latest Episodes:
    Open Source Tapeout with Matthew Venn Jan 23, 2023
    Show notes

    Welcome back to the show, Matthew Venn!

    • Matt was previously on Episode 467 from 2019 Supercon, before he started working on the open source toolchains and the education around them.
    • A bunch of news in the open source silicon space
      • Latest shuttle was MPW8, MPW9 coming up soon
      • 2 new open PDKs
    • Open source tools growing, much of it comes from Google "Willy Wonka-ing" process and sponsoring the shuttle
    • This was driven by past guest Tim Ansell (on 501)
    • Tim Edwards of efabless
    • Claire Wolf was on the show in the past
    • Dan Burke talked with Matt at Supercon 2023 about the term "Tapeout"
    • Matt runs the ZeroToAsicCourse youtube channel, which includes a podcast.
    • Global Foundries / IHP open source
    • What is driving the growth?
      1. Open source tools
      2. Google MPW
      3. Open source PDK
      4. RISC V
    • Ming Zhang on The Amp Hour talking about chiplets with ZGlue (now defunct).
    • If you don't get into the lottery, you can pay efabless $10K for 300 chips
    • Packaging is also tough
    • Volume problems - What happens between 300 chips and 10K chips?
    • Why should people get started with trying out the open source tools?
    • Why are people signing up for the couse?
      • 30-50% want to understand silicon
      • 20% are academic -- many Universities are switching to the open source toolchain
      • 20-30% are commercial users who might want to use the info for
    • Reasons for going custom silicon as a business?
      • Security by obscurity
      • Space
      • Power
      • Sourcing (?)
    • MPW gives you about 10 sq mm
    • Matt put more designs onto his MPW slot, bundling even more designs (which has continued on)
    • OpenRAM
    • You could fit 25K of SRAM on 10 sq mm
    • #OpenSourceASICHighlight
    • Mohamed Kassem of eFabless was on the show in the past. eFabless highlights designs on their site.
    • Check out the 2022 highlight video from Matt!
    • Open Tapeout
    • FOSSI foundation runs the Latchup Conference
    • OSDA
    • India driving growth of chip design, many large scale companies also have verification teams in india
    • Security and "inspectability" from cloud companies
    • Root of trust chips - Laura from Oxide talked about this when she was on the show.
    • TSMC has an educational program for students in Taiwan
    • TinyTapeout
    • Extension of the course, joining designs together with a tristate bus
    • "Vosotros" is the "y'all" of the Spanish language
    • HDL is mostly controlled by the tools
    • OpenLane by eFabless was based on OpenRoad
    • TinyTapeout is meant for beginners
    • Uri from Wokwi (on show 599) worked with Matt on TinyTapeout
    • He added gates to Wokwi, which then can be connected together. The program pushes the gates out, which then can be synthesized.
    • You're closer to the hardware with Wokwi than you will be with Verilog.
    • 500-600 standard cells in tiny tapeout
    • The Shuttle lottery is getting harder to win
    • There are more TinyTapeout slots
    • It costs $25 for design only, $100 for chips
    • When you get the chip back on a PCB, you select your design (or others!) with a DIP switch
    • Check out what was on the TinyTapeout 2nd run
    • Olof Kindgren won the Serv RISC V prize, which is a small bit serial processor. Past guest Greg Davill put that design onto TinyTapeout.
    • There is a Discord for the course
    • Siliwiz explains how silicon can work, allows you to use sliders to control how the silicon gate sizes change.
    • A wafer will take 6 months start to finish if all goes well.
    • MPW1-4 had a hold violation. Sylvain (TNT) who was also on episode 467 did some wizardry to get things working!
    • Siliwiz still not open to public
    • What does it take to tape out a design? Putting the logic inside of other logic when creating a wafer. Then eFabless takes care of the rest.
    • The harness with everything that allows you to access the low level IO is called "caravel"
    • Europractice is another IC service

    Augmented Engineering Jan 16, 2023
    Show notes
    • Dave is currently on holiday (at the time of recording), try to find him with this Tweet.
    • Worldle
    • YouTube channels that do
    • Chris and Dave took a Canberra trip when Chris was in Australia
    • Dave made a video about AI and ChatGPT
    • Chris could not get midjourney to make a "curly" straw and so he did it the old fashion way. For those interested in low power, there is a webinar coming up Weds about "Sipping Cellular IoT Power"
    • Moving up the value chain
    • Collaboration and augmentation
    • Chris has started building his conference calendar, reach out if you're going to be there!
      • Embedded World in Nuremberg Germany March 14-16
      • Embedded Open Source Summit / Zephyr Developer Summit in Prague, June 26-30
    • There was a community Maker Faire in Melbourne, Dave was suprised they are still happening.
    • Chipsets for mobile phones to talk to satellites
    • T9 text input
    • Starlink
    • New Espressif P4 Chip
    • PCB with built in strain gauge for weighing
    • MLCC capacitor cracking. AVX Ron Demco talked about that when on the show
    • Yearly perfomance reviews
    • Want to work with Chris? Check out the FAE job posting
    • Twitter has not collapsed, Chris lost the bet to Dave
    • MounRiver makes the compiler for the ch32v003.
    • We asked ChatGPT about a compiler company name
    • "A good name for an embedded compiler company could be something like "FirmwareForge" or "EmbedCompiler Technologies" or "MicroMate Compiler" which effectively communicate the company's focus on embedded systems and compilers."
    • Pete Holmes talking about not knowing
    • Dave used to be "advanced" by adding digital photos to lab reports
    • Dave's Sony Mavica teardown

    Reunion Impedance Matching and 2023 Predictions Jan 09, 2023
    Show notes

    For the first week of the new year, we welcome back some past guests to talk about electronics in 2023.

    • Alvaro Prieto is a co-host of The Unnamed Reverse Engineering podcast and has co-hosted The Amp Hour before. He currently works at Sofar Ocean.
      • 363
      • 456.2
      • 440.2
      • 440.3
    • Ariel Briner was on episode 260 of the show talking about CartesianCo, a now defunct startup. Ariel now runs an 8 person consulting shop in SF called Electron Labs.
    • Chris Osterwood was on episode 425 talking about Capable Robot Components, which he is still working on. They are preparing to release new hardware in 2023.
    • State of robotics
    • Possible to have consulting with robotics?
    • We were recording during CES 2023
    • AgTech
    • Robotic pizza
    • 3H meetup
    • Modex Fulfilment(conference)
    • IoT
    • Electron labs projects are 30% IoT, but more are connected (50%+)
    • iPhone globalstar connection is now possible and Iridium is coming soon.
    • Alvaro uses Blues Wireless modems to do firmware updates on buoys near the shore. Ray Ozzie (founder and CEO of Blues) was on episode 603.
    • Bugs in different locations due to unicode characters (or null characters)
    • FreeRTOS vs Zephyr
    • STM32U5 has DMA in stopmode, which is a low power option for DMA
    • Alvaro has been creating Joulescope front plates
    • What kind of mix of hw and software are each person doing?
    • USB C cable tester
    • ESP32-C3 is a RISC V wifi chip from Espressif. There is also support for Rust on that and some other Espressif chips (Chris Osterwood has been trying it out)
    • Hubris OS from Oxide. Oxide engineer Laura Abbott talked about this when she was on the show. Another Oxide engineer Rick Altherr was on the show (before he worked there)
    • Board bringup is a hardware activity for fimware engineers.
    • Firmware with hardware when the power rails are controlled by the micro
    • CM4 / Linux
    • Buildroot vs Yocto
    • Custom vs dev board
    • Chaos camp
    • Mark Rober video (car breakins)
    • RISC V
    • AI
    • Midjourney
    • ChatGPT
    • Is it all just "Stochastic BS"?

    It's a Keyzermas Miracle! Dec 19, 2022
    Show notes

    Merry Keyzermas, 2022! Jeff Keyzer of Mightohm.com joins the show once again.

    • Jeff has been at his place in Seattle since 2018
    • Previously when he was in Redmond, he put his antenna up in the trees
    • This year Jeff set up antennas at his new place
    • New things in Amateur radio, SDRs
    • ICOM IC705 portable
    • Sunspot cycles impact how far you can communicate
    • 5-10 watts in the backyard
    • Taking ham radio setup camping
    • Crater lake
    • Goldeneye antenna coming out of a lake (Aricibo, now busted)
    • Cape Disappointment
    • Parks on the Air
    • "2022...which is this year"
    • Long Beach Washington kite festival
    • Jeff put an antenna on a kite
    • Doers vs talking in amateur radio
    • FT8 mode
    • QRZ.com
    • IC7300 brought people back
    • Alan Wolke YouTube channel
    • Jeff hasn't been doing much consulting
    • Kit business gangbusters because of Ukraine
    • Atmel DIP parts are easier to get than other Atmel parts (but still not easy)
    • Eurorack companies closing
    • Test equipment upgrade
    • 8753D
    • Agilent took down legacy resources
    • Fixing test equipment as a way to learn
    • 53310A
    • Can't just get a piece of test equipment on a whim
    • GPS connected to MDA can get parts per billion (!)
    • Plot frequency vs time
    • Saluki
    • Fusion news
    • Hotplate vs oven for reflow
    • Making generated art (couldn't pass up the Clark Griswold reference, sorry)

    Slapping Industries Dec 13, 2022
    Show notes

    Show notes Listener points out Dave said to slap him in Episode 255 if he ever said he was getting a pick and place. Dave stated as much in episode #610 Dave posted a bunker tour and clean up video on Odyssey 10 cent micro showed up to Chris's lab (discussed in #610) The tooling has a windows focus, the toolchain is called MounRiver. There is some OpenOCD tooling specifically for it. GitHub repos open a web based VScode window when you hit "." (period). You need to be logged in. Discussion on embedded.fm 435 about GitHub codespaces Christmas lights Arduino is targeting the industrial market with the Opta "microPLC". They will have ladder logic for this device. John Davis was on episode 385 talking about the difficulties of working in a machine building environment. A new part from Sony/Altair, the ALT1350, looks like it has EVERYTHING in it: Cellular, GPS, WiFi (hotspot finding only), 2.4GHz / 802.15.4, sub Gig. So many radios! Lock teardowns Artemis The Grid (book) Automated transcript 00:19.99 Dave Welcome to the amp hour I'm Dave Jones from the EeV blog 00:24.37 chrisgammell And I’m Chris Gammell of the slapping industries because I am supposed to be slapping you. 00:30.24 Dave Well oh I know what this is about right? Thank you to the person who put this on who do who did who put it on the silly lie and yeah, thank you very much got the most up votes. Yeah, go ahead. Do it do it. Although I haven’t technically got 1 00:36.26 chrisgammell Ah, five days ago yeah this is this this silly lion. 00:43.43 chrisgammell Yeah, yeah, yeah, okay here we go here. We go ladies and gentlemen in the light of last week’s episode I just wanted to say that in episode number two fifty five at timestamp Fifty Six Twenty Dave says that quote. 00:47.77 Dave So you know and. 01:00.31 chrisgammell You ever hear me utter. The the words I’m contemplating getting a pick in place just you know slap me. Thank you and happy holidays. Fantastic! What a great callback? Yeah yeah there we go all right? all It’s okay, yeah. 01:07.57 Dave Ah, ah, ah or cheese and ah oh I think I’ve come to my senses I well was I thinking. Ah oh boy. Yeah, um, so yeah, so trust some nerd to remember. 01:20.52 chrisgammell And yeah, well I mean that’s I have to wonder like were they just now listening were they to listen to it recently or they have like photographic memory. Yeah, right, Very impressive. 01:25.78 Dave Right? Remember Well did they actually pull that out of their memory bank I wouldn’t surprise me if they pulled that out of their memory bank because I can still say oh yeah I can remember that in in you know, an episode ah episode and a copy of. 01:44.83 chrisgammell And yeah, yeah, it probably means that they they they had something in their memory that they they’re like yeah I really would like to see Dave slapped. 01:45.10 Dave Electronicks Australia Magazine back in 1985 there was this article that said blah blah blah blah blah you know like I can probably pull that out of my ass. But. 01:57.77 Dave Right? Slap me right? Yeah possibly Yep yep I don’t know I’d like ah I don’t know what triggered it I don’t know. 02:04.26 chrisgammell Ah. 02:09.15 chrisgammell What the the urge to get a I think it is completely natural I Think here’s here’s the thing the ah the I think the journey often goes like this. 02:10.15 Dave The ah the the lust for a pick and yeah, the urge to get a pick and place machine I don’t right. 02:21.58 chrisgammell Ah I’m so frustrated if only I could just build you know like ah these boards are taking so long to build if I’m sending them out or they’re taking so long to build if I have them in-house. All I just needed is some robot to do this. It would be so easy if a robot would do this and the answer is yeah of course it would if it was perfect but it it just sucks you know like even you know even the ones. 02:26.95 Dave There. All right? and and then you start realizing that it’s oh it’s only five bucks a board to get your board assembled or whatever right insert symbol here like and insert your assembly figure. 02:41.15 chrisgammell Yeah. Sure sure yeah. 02:48.61 Dave There right? Yeah, but let’s just say five bucks to assemble aboard you go like well how do you justify $10000 pick and place machine and all the infinite amount of time and energy required to run it and massage it and maintain it and pull your hair out and learn it and you know and. 02:56.98 chrisgammell Yes. 03:03.51 chrisgammell Yeahp I think it’s it’s really that like the idea of like the drop of the hat you know I always talk about like the 2 a m problem and like if you had a thing at 2 am yeah you know like this would be super super useful, but most people I feel like do not have that and the ones that do you know. 03:06.68 Dave Yeah, right? yep. 03:20.10 Dave Yeah, oh yeah, of course well I think part of my motivation is that it would and part of the inspiration is that I think it might motivate me into doing actual designs and getting them assembled. 03:21.50 chrisgammell It’s probably faster cheaper to just pay for overnight service like from a actual assembly house. So I think it’s. 03:37.50 chrisgammell M. 03:39.21 Dave Right? because I’ve if I’ve got the capability there I go oh here’s an idea for I could sell a couple hundred of these boards you know? and yeah, why not just do this and then just right. 03:41.56 chrisgammell And yeah I I I don’t I don’t agree with that for myself I think that’s like the the buying a buying a treadmill in order to start running I think really I should just go outside and start running. Yeah. 03:54.21 Dave Right? Okay, yeah, yeah, you should just and do it but I’m sort of a bit and unusual Caseian I’ve got a large audience who will you know look if I came up with some little widget that you know I could probably like sell and distribute a couple of hundred of them. That’s that’s that’s no problem I think so you know. 04:00.40 chrisgammell Sure sure I think. 04:09.41 chrisgammell I’m sure you could yeah of course of course. Yeah, yeah, yeah, I’m not saying that I’m saying that you should if you were actually serious about that you should build 2 little widgets first. Yeah yeah. 04:13.85 Dave Yeah I should build the widgets first and then and then figure and well maybe I should do that. Maybe I should build the maybe I should build a couple of widgets in anticipation of getting a pick and place machine right? And then I haven’t ready to go. Yeah. 04:24.64 chrisgammell A exactly right? because and there’s always future ones too right? You’re going to. You’re going to do like variations and upgrades and stuff like that. So yeah. 04:35.48 Dave Yeah, well well well straight off the bat I could get into remanufactory my um, my microcurrent or a variation of it. Maybe I can just do a new variant of that. But I’ve got a couple of ideas I just need the inspiration to spend the time on them to you know to actually get it done. So. 04:40.36 chrisgammell Chair there here. Yeah, yep, totally right? yeah. 04:52.61 Dave Yeah, and and I’ve got the extra room now to do it So that that’s another thing right? Well actually it pretty much I think it it was that no it was if you see my video. It’s um, over it’s on my Odyssey channel. 04:56.74 chrisgammell Right? right? Maybe oh actually it’s full of stuff already. 05:11.23 chrisgammell No, okay, that’s I haven’t in that yet. Yeah. 05:12.60 Dave It’s an exclusive over there I think I don’t think I put it on my main thing. But anyway we have to link it in. It’s where yeah I actually cleaned up my bunker and I was so astonished at the amount of bench space I had and I went war I could put a desktop pick and place machine here if I wanted to you know and. 05:20.62 chrisgammell Um, yeah. 05:27.14 chrisgammell Yeah, yeah, yeah. 05:31.90 Dave And and then I actually started So that’s what like I and then I just grabbed my camera and I just shot a little blurb down there and that’s what that’s where the inspiration came from I think and and. 05:38.74 chrisgammell That’s what started the whole thing. Why and so and actually there was an update on that right? So we had we had talked about it on the show and then you would also kind of kept going with it and then I think you had kind of figured out that like you don’t you don’t want to go with that machine that you had talked about on the show. 05:44.29 Dave Yes, well. 05:52.34 Dave No the kit. No, even though. Um, thank you the light place. Sorry I forget his name but um, yeah, he’s still making the light place and he did. He said if I if I wanted to actually do because the kit I’ve got is like 7 years old and so it’s not you know. 06:06.40 chrisgammell Note this wasn’t the kit. This was ah you had talked about the the YYZ or something like that if you the need why I okay yeah. 06:11.70 Dave Ah, all the ah why why one yeah the yeah yeah, no I no look there. There’s been discussion on the forum I’m involved in this forum 3 where some people are you know there’s like 3 or 4 people on the ev blog forum we’ve got one you know and like. There’s there’s 1 person saying look. It’s okay, it’s doing the job. You know I solved these problems but most people seem to think oh no, the feeders are really dicky and you know and then the last thing you want is feeders that a dicky right? That’s that’s the whole thing with pick and place machines is reliable feeders right. 06:45.58 chrisgammell Yeah, yeah, totally yeah. 06:47.27 Dave That’s that’s that’s that’s like the biggest grief with a pick and place machine. It’s not that you got to spend the time to programmer you know, look that’s you know, easy easy peasy right? Yeah, no, but that’s but that’s you got to do that with any you got to do that with any machine right? But the differences between machines are in how reliable is the pick and place. 06:53.18 chrisgammell But that’s that’s something. But yeah, it’s not as much right? Yeah yeah. 07:06.46 Dave Stuff how reliable is the vacuum system the feeders, the pulloon the tape back and you know doing all the rest of it right? Can you just set it up and go and come back and you know you’re a thousand parts are done orchi or do you have to sit there and massage the damn thing you know. So yeah and like yeah, there’s just too many reports of. 07:07.48 chrisgammell Ah, yeah. 07:12.72 chrisgammell Um, yeah. 07:17.59 chrisgammell Right? yeah. 07:25.96 Dave Of dicky feeders these friction These are three D printed by the way they’re three D printed feeders. So as I think you spotted on the previous podcast. You actually see and you saw the image and you went Oh they’re they’re being three D printed. No, apparently they’re three D printed. Yeah so. 07:30.28 chrisgammell Interesting. Yeah, yeah, yeah I looked I looked at the photos at least but that could have been promotional or early photos versus production. Yeah, interesting. Yeah. 07:45.26 Dave Yeah, which is fine if they work right? But yeah nah anyway, um, an update from the previous show when we talked about is I did actually put a bid on on a local used machine. Um, and it came with 44 yamaha feeders. 07:48.96 chrisgammell I guess. 07:57.89 chrisgammell No interesting. Oh Wow. Okay. 08:04.72 Dave Right? It was like like it was yeah it was the real deal right? and it was a desktop one and I would have had to drive to canberra to get it but fine. Okay I could do a road trip right? to get it and you know and um, a rent a Ue yep and well actually I did actually check. 08:10.93 chrisgammell Okay, yeah, yeah, yeah, yeah, rent a Ute. 08:22.90 Dave The I car I did actually measure the car and it might have just fitted in the car. It’s ah it’s more of like the awkwardness because it weighs like one hundred and ten Kilos so it’s more like the awkwardness of trying to like slide it in there and you know stuff like that. So it it it? Yeah, so well don’t care about that. It’s an old car but you know, um. 08:25.77 chrisgammell Oh okay I know? Yeah, yeah, yeah, yeah, yeah, not hang up the car to ah at it. 08:41.43 Dave Yeah, so we weren’t yeah so it it would have actually fitted the problem is getting it anyway. I could have figured out the transport right? And so I unfortunately I should have hit the buy it now button. Okay because the guy like there was a make an offer thing so I went. Oh yeah, I’ll make an offer So I made a you know quite a generous offer on it. 08:51.31 chrisgammell Me. 08:59.50 Dave Um, but it it was below the selling price. So I waited for the guy to get back to me and then he didn’t get back to me and then the it it just vanished the actual ebay listing just vanished right? So um I contacted him said hey yeah, what’s going on you know and he said oh no, we decided to keep it. It’s like oh damn. 09:08.14 chrisgammell Yep. 09:17.94 Dave So even even if I hit the Bowat now button and like paid for it straight away I think he would have re-nigged on it anyway. So you know anyway, yeah, and and that yeah it was a use machine. Um was it the charm high or something which yeah I know they got a bad. Oh no, it’s some variation you know it. 09:19.59 chrisgammell Yeah. Yeah. 09:36.47 Dave It is one of the chinese ones but it’s one of the better ones. But yeah, like but but but it uses yamaha feeders right? So it’s one of the ones. Yeah, and okay and it came with like forty yamaha feeders for goodness sake. So I’m like like and it was only like 3 3 grand or something. 09:37.35 chrisgammell But then yamaha feeders Interesting Interesting. Yeah. 09:48.18 chrisgammell And maybe you should just ah contact that person and just be like hey you want to build some boards. 09:53.96 Dave Yeah, right? Well ah well I’ve already got my assembly guy up the coast. You know I’ve already got my assembly guy for what board assembled you know? So so’s no problem. Um, hey I’ve got one I’ve got one in the business park here. There’s an assembly house in the business park here. You know I can just walk. 09:55.56 chrisgammell And come down I can do some videos and yeah may okay, they go? Yeah, Okay, sure sure. Okay. No there you go Boom done. Okay, So what’s the problem here Man just go talk to that person again. 10:11.63 Dave Down the road and have my boards assembled. It’s not the same. You know what I’m making myself Anyway, yeah so um, yes I was all hyped about that. 10:19.58 chrisgammell Okay, well. 10:24.58 Dave And was all ready to go. You know I was planning my trip I was checking out you know, ah you know prices to hire utes and stuff that you know I was like I was going to go yeah know and like I was happy to pay the original price like if he wanted to haggled on the price I would have paid the full price right? And um, yeah, and he just know Damn it. 10:38.92 chrisgammell Um. 10:43.48 Dave So that one fell through and like and they’re so rare here. That’s the problem right? Yeah, yeah, well you can buy secondhand pick and place machines here, but you get them through like there’s 1 or 2 big dealers and no, you’ll be paying 20 grand for one so you won’t be able to get like a used desktop one for. 10:45.16 chrisgammell And yeah, yeah I think that’s the thing they haven’t been imported right. 10:56.30 chrisgammell Um I see oh. 11:02.88 Dave You know under 5 grand no isn’t gonna happen. So this was yeah rare as hens teeth, especially one with that many feeders and I think they were genuine yamaha feeders. So who you know anyway. Ah boy I don’t know whether I should just go for it and yeah. 11:12.95 chrisgammell If yeah. Oh well, there goes that dream I think you should just build some honestly you should just build something I think you got to you got to get those muscles flexing again you know think about it like the gym right? This is your couch to five K but it’s a couch to building this all icon of widget. Yeah yeah I like build something like. 11:22.56 Dave Yeah. 11:29.54 Dave And bill as in build something or actually design a product you talking to build build in right. 11:…

    Full show notes at the publisher

    Grad School Time Capsule with Joshua and Zach Dec 05, 2022
    Show notes
    Joshua Vasquez of The Allen Institute and the Jubilee Project and Zach Fredin of Commonwealth Fusion Systems

    Welcome Joshua Vasquez of The Allen Institute and the Jubilee Project and Zach Fredin of Commonwealth Fusion Systems!

    • Background
      • This is a special show because I (Chris) found a 2019 recording during Teardown (other shows were released from that event). Somehow the show with Joshua and Zach was never published, I think because I found it on my recorder much later.
      • The 2019 show (starting at 1:31:00 on the recording) was when Joshua had been in grad school at the University of Washington for 1 year and Zach was getting ready to go to grad school at MIT at the Center for Bits and Atoms (CBA). Both were intending to get their PhD.
      • I caught up with Joshua and Zach at the 2022 Hackaday Superconference in early November (discussed on 610) and learned that they had both left their PhD program with a Master's Degree and now were back in industry, working at some very cool new jobs.
      • I thought it would be an interesting experiment to record with them again in 2022 and get their perspectives on grad school...but I didn't let them hear the 2019 show first.
    • The Jubilee Project is a toolchanger on a CNC machine / gantry.
    • Zach had been on the show before for Neurotinker
    • Zach worked on Reconfigurable computation systems
    • NMR
    • Joshua joined University of Washington to work with past guest Nadya Peek
    • "Fabricatability"
    • Kinematic coupling, which is a method of exact constraint
    • It's like "Free body diagrams but in reverse"
    • Bal-tec precision balls
    • Joshua contacted a seller on alibaba and has an 8 mm ball with M3 threaded hole made for other people wanting to build a Jubilee
    • Hackaday vocabulary of parts
    • Misumi
    • Jubilee project long term? Still going, some people building the project still. Filistruder makes a kit based on it.
    • Jubilee Discord community
    • The community is working on some specialized heads, like a sonicator head
    • Zach was working on nuclear magnetic resonance, trying to make containers that could withstand 7 million rpm / 112 kHz.
    • Using the machine they were able to get the molecular spectrum (like mass spectrometry) of things like brain plaque for Alzheimers research.
    • PI = Principal Investigator
    • Work is continuing on the microadjusters and making diamond tubes
    • What are the downsides of grad school?
      • Getting to work on the things you want to work on
      • Balancing Research and Development
    • Prior to grad school, Joshua was at a synthetic biology company. He was "the human who would write software for hardware" and building machines for their manufacturing capabilities.
    • E3D toolchanger
    • Was drudgery part of the process?
    • Zach gives cautionary advice for grad students: "Early on you need to learn how to evaluate rabbit holes" (note this advice when listening to the 2019 section)
    • Tidal forces
    • How to make almost anything
    • Joshua says that in grad school, "the projecting part of you becomes weaponized. [It was] was near and dear to who I was"
    • A lot of work before grad school was trade secret
    • Joshua's current work is open source, which is an unexpected benefit.
    • He works at the Allen institute (named for Microsoft co-founder Paul Allen), in the recently formed "Institute for Neural Dynamics".
    • They are imaging mouse brains to understand what are the ingredients inside the brain.
    • They already know a lot of the genes in neurons, but now they're finding out where those genes are expressed.
    • The project he's working on is like a "reverse SLA printer".
    • It's a rolling shutter camera with a laser sheet slicing across a mouse brain that is "transparent" (with some bio chemical voodoo)
    • 1 mouse brain = 100 TB of data
    • Zach is now working on Commonwealth Fusion Systems, a 400 person startup for fusion energy.
    • They are busy trying to get deuterium and tritium to fuse
    • ITER is a long running fusion project in France, built using the magnetics available at the time.
    • CFS is using higher temp superconductors, which represent better magnetics. Magnetics and plasma containment are one of the key constraints for "power in vs power out"
    • Zach does instrumentation for the machine as a "Tokamak Instrumentation Engineer"
    • The platform CFS hopes to commercialize is called "ARC"
    • Zach is getting back to making by joining the recently relaunced Artisans Asylum
    • Joshua felt bona fides (masters degree from UW) helped in the interview for his current job (which he found out about at the Seattle Hardware Happy Hour!), but he didn't need to have the knowledege gained at grad school to understand the work.
    • The 2019 portion of in the show starts around 1:31:00

    Picking a Pick and Place Pickiness Nov 21, 2022
    Show notes
    • Dave is considering getting a Pick and Place
    • Chris mentioned the episode with Saber where they talked about the Vapor Phase One.
    • Seon (UnexpectedMaker) has detailed his trials with Charmhigh and Neoden Pick and Place machines
    • Chris gave a talk at Hackaday Superconference called The One Engineer Dev Shop, which mentioned having in-lab manufacturing (and how it might not be a time saver)
    • Neoden YY1 is less than $3K. There's a thread about it on the EEVblog forum.
    • Chris mentioned the Lumen (by Opulo) from Stephen Hawes (who also documents on his YouTube channel), but Dave thinks it'll be too DIY for his needs.
    • Mrs EEVblog pointed out this article about using Mushrooms to reduce eWaste
    • After seeing the name of the site, Chris recommened The Anthropocene Reviewed, a book by John Green (vlogbrothers)
    • Dave posted a Heat pump follow up video to the original (we talked about this the last time we recorded together)
    • Chris is reading a book about the Grid now that he finished past guest Kathy Joseph's book about the history of electricity.
    • The Hackaday Supercon badge was a 4 bit computer that you programmed with assembly.
    • See how all the badge hacking turned out (and spot a familiar face around the 20 minute mark)
    • The winning "add on" category hack was a "punch card"
    • A $0.10 RISC V part was released by WCH out of China
    • The manual is available here and the product page is here
    • Maybe Dave will use that on the first product he picks and places? :-D

    Open Circuits with Eric Schlaepfer and Windell Oskay Nov 14, 2022
    Show notes

    Welcome Eric Schlaepfer and Windell Oskay. They are Co-Authors of “Open Circuits: The Inner Beauty of Electronic Components”.

    • Windell's background is in physics, he worked on some very sensitive experiments at NIST. He has been running Evil Mad Scientist Laboratories (EMSL) with Lenore since 2006.
    • Eric has worked at large software and semiconductor companies throughout the bay area.
    • Eric and Windell started collaborating together on the "three fives kit", which allows people to build their own 555 timer out of discrete components.
    • The first prototype was breadboard that is still in the EMSL library.
    • The 555 Footstool
    • They went on to collaborate on the 741 discrete op amp kit, which comes in through hole and surface mount.
    • Eric made a fake datasheet on an ideal op amp
    • The MOnSter6502 was a discrete version of the MOS 6502. It had additional LEDs that showed the state.
    • Chris was thinking about it when he saw the Hackaday Supercon 2022 badge.
    • The meetup after Bay Area Maker Faire was where it was conceived when Bunnie (past guest) asked what the largest discrete version of a part could be. The meetup was also the basis for Hackaday Superconference ("what if we could make that meetup be the entire weekend?")
    • The creator of the 6502, Chuck Peddle, was on the show back in 2015
    • Open Circuits is a book they have been working on for a few years together that was recently released.
    • Focused on components, not devices
    • Chris just finished Kathy Joseph's book The Lightning Tamers and was amazed at the comparison of modern electronics with how things started in the field of electronics.
    • Natural vs synthetic materials
    • The Way Things Work (McCaulay) was another formative "coffee table" book, albeit with more Mastadons on the cover. The book Eric was trying to remember was ... also called The Way Things Work
    • Why not use CTs?
      • Loses texture and color
      • Flattens the image
    • What are the slogs of writing a book?
      • The time process
      • Took 9 months to get inital material
      • Took another 9 months for editing and getting things right (explaining to a wide audience)
    • No Starch Press provided a great editor.
    • Describing complex topics like "multiplexing" is tricky to a wide audience.
    • "Up Goer Five" (XKCD) is an example of simple language trying to explain complex topics.
    • Windell works on the AxiDraw on a daily basis, which is a pen plotter (and associated software)
    • #PlotterTwitter is a hashtag on Twitter to follow digital artists
    • TubeTime is Eric's experiments on Vintage computing. He also does long tweet threads on many of his projects.
    • He's currently making a replica Apple I computer
    • There is a large community; AppleFritter is a site that documents a lot of idiosyncrasies of the original computer
    • Many early computers has async logic to cut down on required circuits. HDL solves clocking for you.
    • Eric troubleshoots using a Saleae Logic Pro 16
    • Stringy floppy
    • How to preserve data in an era of "using other peoples' computers" (Cloud). The Internet Archive maintains a lot of data.
    • Twitter is hopefully not shutting down anytime soon, but :shrug:.
    • Get your copy of the Open Circuits Book at any of the vendors listed on the book website.
    • Evil Mad Scientist has signed copies! (be sure to click "yes")
    • Find Windell online at evilmadscientist.com
    • Find Eric on Twitter at @tubetimeus, his website tubetime.us, and (if needed) tubetime@mastadon.social

    Vapor Phase with Saber Kaygusuz Nov 08, 2022
    Show notes

    Welcome Saber Kaygusuz of PCB Arts!

    • PCB Arts has been developing the EdgeKit, a modular platform for AI and vision applications baesd on the nVidia Jetson
    • Saber and team were building robots previously, up through 2017
    • After they encountered software people not understanding hardware, they decided to focus on nvidia jetson
    • They focus mostly on smaller companies
    • Example application is an inspection tunnel in auto manufacturing
    • Use nVidia resources to rebuild camera modules in the kernel
    • They have 6 people on the team and do consulting services in additoin to the products they build
    • 3 month timelines for projects
    • They have been focusing on reinvesting in the business and investing in product development
    • Buying parts 1.5 years ago
    • Complexity of the product determines the percentage of the overall process the design piece is (vs manufacturing / certs / sales)
    • The Vapor Phase One is a prosumer level Vapor Phase reflow machine
    • Chris first encountered Vapor Phase when Jonathan Hirschman of PCB:ng was on the show.
    • Compared to infrared ovens, Vapor Phase doesn't have to worry about scorching or shading components.
    • Normally they are 10K+ euros for oven
    • Safety wise, it's safe as long as the liquid is heated precisely
    • The Vapor Phase One is available in their web store
    • Also available on Mouser for US people (as are most Crowd Supply campaign products). There are 4 distributors in Europe.
    • It was a hassle to get the product certified in the US
    • They targeted a $1500 price, ended up at $5k (still half of most Vapor Phase)
    • The liquid inside the machine is called Galden, which stays at a stable vapor temperature when heated.
    • 1kg lasts 1 year or more.
    • After a bit of time, you need to clean the flux out of the Galden resevoir.
    • There is a post cleaning process based on water cooling built in the system. At 120C, the PCB will come out "dry".
    • PCB Arts has posted on Twitter/their blog about visualizing boards in Blender.
    • They are focused on software improvements for the Vapor Phase machine.
    • Since PCB Arts is based in Nuremberg, they will again be at Embedded World
    • Follow the company and Saber at PCB Arts on their site.
    • Follow Saber on LinkedIn
    Note: Chris lost his voice at Hackaday Supercon, that's why we had a computer intro!

    The Joulescope Upgrade with Matt Liberty Oct 31, 2022
    Show notes

    Welcome back, Matt Liberty, creator of the Joulescope! Matt was on The Amp Hour in early 2021 (Episode 527) talking about the previous product revision called the JS110. The new model is the JS220, which goes on sale November 2022.

    • Who uses the Joulescope?
    • Changes between JS110 and JS220
    • Switching to pub sub
    • PicoRV32 core (created by past guest Claire Wolf) on the ECP5
    • Specialized ALU on the ECP5 built with Verilog and cocotb
    • Matt got some help on the marketing/business side from Harris Kenny, cohost of the (now paused) Hello Blink show.
    • "Hit by a bus" test
    • Contact Matt (below) about helping with support on the JS220
    • Asking customers what they are really trying to achieve
    • On the consulting forum, we have heard part shortage stories
    • Ordering 500 from CM
    • Cashflow as a small business
    • Voltmeter and ammeter are separate now on the JS220
    • Matt sourced a custom cable assembly and carry case from Alibaba.
    • Testing stations at MFG
    • For tracking manufacturing, Matt uses PartsBox (former guest Jan Rychter)
    • Forecasting
    • Power supply is done with a Cuk (topology) converter to generate the -15v rail
    • Higher rails makes for more dynamic range.
    • The JS220 has more bits on the ADC (15.1 ENOB)
    • Enwavify
    • Measuring through range switches
    • Bounded error during times of switch
    • "Anyone who's played with mosfets says 'this is super weird' "
    • Power profiler from Nordic and similar chip company offerings will do some but not all measurements.
    • ISO17025
    • Why would you need 100 MHz of bandwidth? Only if you're able to probe directly on silicon
    • 300 kHz on the Joulescope for boards because that's likely what your board can handle with parasitics on the PCB
    • C API with Python bindings
    • Moving towards Simultaneous Device Support, bringing it to the UI
    • Matt Venn MPW shuttle
    • Evaluation kit with RP2040
    • Thonny is a simple IDE for Python
    • REPL
    • Using PIO onboard with the generation code in the examples for the RP2040
    • Reserve your JS220 today on Joulescope.com
    • Follow Matt on Twitter: @mliberty1
    • For support, visit the Joulescope Forum
    • Listen to Matt talk about working with contractors on Hello Blink episode 23
    • Check out Joulescope projects on GitHub
      • New Joulescope driver
      • JLS (file format)
      • Pyjoulescope (JS110 & new compatibility layer)
      • Joulescope UI
      • Joulescope examples

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