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Вміст надано The Amp Hour (Chris Gammell and David L Jones), The Amp Hour (Chris Gammell, and David L Jones). Весь вміст подкастів, включаючи епізоди, графіку та описи подкастів, завантажується та надається безпосередньо компанією The Amp Hour (Chris Gammell and David L Jones), The Amp Hour (Chris Gammell, and David L Jones) або його партнером по платформі подкастів. Якщо ви вважаєте, що хтось використовує ваш захищений авторським правом твір без вашого дозволу, ви можете виконати процедуру, описану тут https://uk.player.fm/legal.
A weekly podcast about the electronics industry. Occasional guests. Lots of laughs.
…
continue reading
412 епізодів
Відзначити всі (не)відтворені ...
Manage series 30867
Вміст надано The Amp Hour (Chris Gammell and David L Jones), The Amp Hour (Chris Gammell, and David L Jones). Весь вміст подкастів, включаючи епізоди, графіку та описи подкастів, завантажується та надається безпосередньо компанією The Amp Hour (Chris Gammell and David L Jones), The Amp Hour (Chris Gammell, and David L Jones) або його партнером по платформі подкастів. Якщо ви вважаєте, що хтось використовує ваш захищений авторським правом твір без вашого дозволу, ви можете виконати процедуру, описану тут https://uk.player.fm/legal.
A weekly podcast about the electronics industry. Occasional guests. Lots of laughs.
…
continue reading
412 епізодів
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×Welcome James Adams , Chris Boross , Liam Fraser , and Luke Wren ! The last time the RPi team was on the show was about the RP1 (#648) The order of parts being released was RP2040->RP1->RP2350 Check out the datasheet for the RP2350 Learning from silicon Security and power states The part is a “Dual dual core” The Arm side is a Dual M33 The RISC V side is a Hazard 3 processor , designed by Luke based on a previous processor called the Hazard 5 HB5 There is a mux on the core and you select which side you’re going to use at boot There are 48 GPIO (but users always want more) Chris Boross (first time on the show) is on the commercial team. He’s seing interesting applications for the RP2350 including devices that are using it for motor control. They also have seen the part used in satellites because mRAM or masked ROM is less susceptible to radiation errors The PIOs have changed, but are more evolutionary from the RP2040 The PIO allows you to create state machines that process inputs without processor interventions, basically like tiny cores 2 cores – 8 total Interesting PIO applications Luke still likes that DVI on 2040 that was discussed on the first episode they were on (#529) CAN is possible USB host / device MII / RMII ULPI – USB 2.0 Phy The core frequency only increased 133 MHz -> 150 MHz. There is tougher timing with the M33 LVT – lower voltage threshhold 30 -> 40 pins There are now variants listed on the RP2350 product page (but not in mass production) that include flash in the SOM package RP2040 was one power domain “Powerman” (and of course AVR Man ) Switched core AON – always on 32 kHz There is a C/C++ SDK that is the basis for other ports Security is a focus for the RP2350 Bootrom in every chip Secure boot M33 features – secure / non-secure RISC V PMP RCP – Redundancy Coprocessor Raspberry Pi had a challenge / bounty for getting the secret out of the RP2350 OTP with secure boot One of the few silicon companies doing this sort of thing in public Past guest Aedan Cullen was one of the hacks called “Hazardous threes”. He gave a talk about it at 38C3 Past guest Colin O’Flynn was also mentioned because collaboration around side channel attacks with the Chip Whisperer IOActive used a FIB – Fine Ion Beam – and passive voltage contrast to capture an impressive image of a decapped chip (see the RPi post ) “Never want to see ‘novel technique’ in an email” Improving the RP2350 silicon How do you decide what to fix/leave? Can it be changed in metal/vias? SIO spinlock not being fixed Chicken Bit Filler cells are reprogrammable and help with fixes It costs approximately $50K per layer to change (ostensibly because of the high costs of masks) ULA – uncommitted logic array Die shrink doesn’t seem to make sense Will keep making each chip as long as 40 nm fabs are around Thinking about the RP2040 The easiest way to get started is to use a Pico (RP2040) or a Pico 2 (RP2350). Both have connectivity options as well. Raspberry Pi is now a public company! Doesn’t change much other than the business scrutiny.…
Welcome, Stephen Hawes ! Chris interviewed Stephen back in 2020 for his second episode of The Contextual Electronics Podcast. It was when Stephen was still working at Formlabs and the Lumen/Opulo were a glimmer in his eye. The Lumen v4 is a Benchtop Pick and Place machine that works with OpenPNP Where are we in relation to reprap? Powered feeders Videos about eeprom KiCad pos file Can reliably place 0402 Lumen v4 product page Motherboard of v4 Running Marlin FW Head has two heads/nozzles Compare the Lumen to other methods (hand placed, paying for assembly) OHM (Open Hardware Manufacturing) podcast What industries are open? Thea Flowers (of Winterbloom synth fame ) just joined the team Microscope Other tools Space constraints Stephen does a great job talking through many experiments and upcoming features on his youtube channel Prototyping PCBs with a fiber laser Micronix Making PCBs on a 3D printer (hack session with Stephen’s former employer) Timon (Skerutsch) makes double sided PCBs by inserting enameled wire through drilled holes Is this the year you should get a Pick and Place? Stephen won’t say yes (but I will)…
Home assistant Homelab subreddit Solar assistant proxmox CarPlay / android auto NUCs Video Interview with Lee (since posted as #684 of TAH) 25K pound amplifier repair and associated EEVblog forum post Louis Rossman also talking about the copyright claim How the Fairlight CMI changed Music Read more here Synths / woodworking are hobbies that will eat all free cash flow (and Chris is considering the latter… ) Pat Gelsinger has stepped down / retired / been forced out at Intel Intel will now have co-CEOs . As past guest Luke Wren wrote on Mastodon, “ Based on historical trends I predict the number of Intel co-CEOs will double every two years “ Startup in Ohio will apparently be making Quectel parts for the US market . We expect to see lots of silliness like this in the next few years because of forthcoming tariffs……
A full 3 hour discussion with the legendary Lee Felsenstein, designer of the Osborne 1, SOL computer, VDM-1, Pennywhistle modem, and the inventor of social media. Covering everything from the Berkeley free speech movement, the counterculture movement, his career, through to Obsorne and how he invented social media with Community Memory. His book: https://www.amazon.com/Me-My-Big-Idea… https://felsensigns.com/ 00:00 – Full 3 hour talk with Lee Felsenstein 08:24 – University of California at Berkeley, and the Free Speech Movement. 29:04 – First Junior Engineer job at Ampex 36:20 – The first hackathons with Richard Greenblatt 37:33 – Hackers, Heros of the computer revolution 1:03:36 – Techical career at Ampex 1:12:52 – Atari Computers and Steve Jobs, Nolan Bushnall, and Allan Alcorn 1:15:00 – He tried to pitch social media to Steve Jobs 1:22:15 – Designing the Pennywhistle 103 modem + 1:25:36 – Marty Spergel selling kits 1:31:53 – Steve Wozniak and how the Apple 1 is NOT a personal computer 1:43:42 – Osborne Computers 1:53:22 – Osborne 1 physical design 1:57:57 – Osborne 1 development timeline 2:01:19 – The Osborne Effect wasn’t what killed the company…
AI tools for helping with coding ( but NOT layout , amirite) Troubleshooting as a skillset Stick meme Dave got an updated electrical box Home assistant Keith Burzinski episode (ESPhome) Toothbrush show Andreas Spiess discussing Bluetooth proxy Ian Scott Johnson DIY home automation Electrarc240 reviews every element of a linear power supply India power cables Buried cables Spotify is bricking the Car Thing but others are trying to save it “injurnear” Chris recently developed and coded up a cellular connected relay board for a Smart Locker application…
Chris has been troubleshooting a PCB with a dead short on inner layers (put in by board house by mistake) Don’t Touch My Gerbers shirt “Is there an AI tool that will fix this for me?” … No Chris dumped a bunch of current in the board and looked at it with this thermal camera 6.5 digit DMM to track down shorts Etching problems in the old days 100% etest Adding rails to PCBs for production Reddit discussion thread: why not work on a product? That is, Dave, the wise one. Videos Live stream issues Post from Twitter: Is 2 layers all you really need? This person thinks so, or is trying to convince themselves as much. Armchair quarterbacking Ian Johnston replacing the display on an 8.5 digit DMM Jack Ganssle has posted his final newsletter (The Embedded Muse)…happy retirement! Jack has been on the show twice: Episode 54 (!) Episode 489 Ward Christensen, Inventor of BBS and XModem, (and former listener of the show!) has passed away Dave is interviewing Lee Felstenstein for our next episode…
Welcome Lukas Henkel of OV Tech GmbH , a product design firm based in Nuremburg Germany! Miniturization and the limits of miniturization Price is a constraint Using standard PCB tech (off the shelf) Open source SIP Steps Conventional pcbs / components Silicon inductors embedded in boards Bonded Bare dies / stacked Need volume to make it work Requirements to fit into ______ iMX8 ULP – 0.4mm CSP SIP Footprint Module abstraction layer talk Framework laptop Software support / BSP SIP will be different than PiMX8 Crowdsupply campaign launching 2-3 weeks and delivery in Dec/Jan OpenSource laptop CM4 vs PiMX8 SPI Flash with backup partition Secure element SE050 Footprint for coral tpu and Halo 8 Trying to solve the problem of vision use cases Marketing using layout / products but also making money on it Katerina show Visualizing simulations Developing intuition OpenEMS Usability is based on python scripting Using Blender for heat map BVTKNodes uses .vtk file output Multiphysics solvers Things that drive Lukas For HDI, Thinking in 3D / 2.5D and being able to visualize Layers ranging from 4 to 18 Any layer design for SIP Wurth electroncis for high density “any layer stackup” Article series on altium for the open laptop Follow Lukas on LinkedIn Lukas also was a co-founder of PCB Arts . We had his cofounder Saber on the show in the past.…
Starship 5 landed on chopsticks! (you know, in case you have been offline for 2 weeks) Dave’s EV had a stuck cable Portable charger is surprisingly good CCS Charging standard Fast charge 36/50 kW MKBHD Chevy Silverado review JLC is now offering silkscreen QR codes to have individually marked boards That’s the board that Chris has been designing on a livestream each week 1 wire UID (pioneered by Dallas, then Maxim, now Analog…le sigh) Dave is selling a new Bryman multimeter, the BM2257 ( teardown photos ) Chris just returned from Embedded World North America, doing a demo at the Joulescope booth Chris also gave a talk at the Zephyr meetup which will be released in a few weeks Hackaday article about their comment section and project/article feedback References Musk Sticks NC floods might impact the supply chain due to Spruce Pine NC being a source for quartz. We didn’t read this article, but it was a better explainer than we had at the time . Meshtastic objects to the proposed FCC changes…
Dan Esparon from Inovor Technologies in South Australia joins Dave to discuss all about the engineering of designing and launching satellites! Dan works for Inovor Technologies , an Australian company that designs and builds satellites entirely in-house! Recently they designed and launched the aussie Kanyini satellite on a SpaceX Falcon 9 rocket https://www.inovor.com.au/missions/ They design and build their own Flight computers, ADCS systems, UHF radios, Battery modules and Solar Arrays in Australia.…
Welcome Katerina Galitskaya ! Chris started following Katerina’s antenna posts on LinkedIn Monopole vs dipole Lower frequences are harder bc longer wavelength PCB size half of frequency Place antenta on the shorter side How to ruin your PCB When to go to a antenna engineer? Where will the device be? Antenna environment Start from vacuum, start adding elements Dummies in the lab. The one in the episode photo is a dummy head filled with liquid (?!) SAR – Specific Absorption rate Simulation vs lab work (dimensions) Anechoic chamber When to go with custom antenna? Buying off the shelf antenna? New Airpods with fancy 3D antenna Ben’s video about laser sintered antennas MIMO / Beamforming the failed promises of 5G When to simulate Some open source programs out there (“EMSee”?) Simulating vs visualizing Most of the time it’s not about vizualizing fields What is the iteration elements of the antenna? Satellite antenna design Good to go external Thinking about the dielectric const of case Follow Katerina on LinkedIn !…
Spam calls Keysight released the HD3 , a 14 bit ADC oscilloscope ( teardown video ) Chris will be at Embedded World North America , please let him know if you’ll be there! Chris will be at the Joulescope stand along with former guest Matt Liberty This is one of the only tradeshows for general electronics in the US, Embedded Systems Conference went away many years ago. Chris, Dave, and Jeff (yesssah!) recorded at ESC in episode 41! Bootstrapping new conferences Cellular power modes Dave old GSM video PSM / eDRX ALT1350 Dave got a smart meter on his home setup EDMI EEVblog forum post about leaky power bill Maybe a trickle Chris has been trying out Meshtastic , which is based on LoRa. Check out Jeff Geerling’s video for a good overview . meshtastic subreddit People posting about airplanes flying overhead ( example post ) like ham radio contacts Meshmap…
Chris has been moving house, which partially explains the terrible audio problems the past few episodes… For a lab, Chris believes in Lots of wire shelving (with epoxy coating) Everything on wheels (including shelving and workbenches) As much storage as you can get Chris has been doing livestreams of hardware design for Golioth . The module he is designing is called the Drachm (“dram”) The hardware Chris has been working on for the past 2 years is now open source Flox video with machine learning on a camera also featured Chris Altium finalized their acquisition by Renesas . The price already went up ( discussed previously) Raspberry Pi released the RP2350 while we were away Inductor polarity on the RPi Pico 2 RP2350 Datasheet You can choose the processors you want (Dual m33, dual RISC V) Microchip was offline due to …. HACKERS Dave has been trying out a new home battery storage system NMC vs LFP Reverse cycle There have been lots of layoffs in tech, including 15K (!) at Intel Layoffs.fyi Being sued for a battery review? Say it aint so…
Welcome Shawn Hymel ! Shawn will be transitioning out Developer Relations at Edge Impulse. He will now be building courses full time. (this was recorded before Shawn announced his departure) He want’s to be like a Professor, which partially explains his signature bowtie Should people go into content? What about Developer Relations more specifically? New courses will include FreeCAD and 3D printing and will be published by Digikey Part design in FreeCAD 0.22 in Mango Jelly Learning modeling vs learning an actual program Scoffolding Making a Zephyr course Zephyr / Golioth training Ecosystem vs RTOS Workshop at Harvard Trying to train on hardware What should engineers know about ML Andrew Ng’s course on Coursera Updated for NumPy / Python Understand Neural Networks Can treat them as a black box More important to understand statistics and data science Hot dog / not hot dog (silicon valley) Model zoos Hugging Face Coprocessing on U55 – U85 ToorCamp Michael Cheich Robert Ferenec Marketing courses Running You can find Shawn as ShawnHymel on most social Twitter LinkedIn Mastodon Bluesky TikTok Instagram You can also check out his site, shawnhymel.com…
Murphy More efficient with cooled panels Battery storage solution Server rack batteries Chris has been doing hardware Livestreams Geofence n8n , Similar to Zapier, IFTTT Home assistant EE Grad wants some insight on new tech https://4dsystems.com.au/ Scott Williams of Xentronix recorded with Dave and then Chris Saw at Electronex My Cousin Vinny Embedded World North America is happening in Austin in October. There is a vendor map now. Voltnuts Open source book Tiny Tapeout Tantalum Caps from AliExpress What’s next for ASML Ben Krasnow printing PCB traces again…
Welcome, Matthias Balwierz / Bitluni / Luni ! Midi pedals Old projects LED walls Dunning kruger Sonar scanner Aliens Romulus Lifelong learning Beamforming Previously had worked on something similar in the medical field but didn’t realize it was the same tech ESP32 Gowin FPGA Video generation / crt control R2R cnlohr videos for making PCBs ESP32 VGA PCB mill Failing Tiny Tapeout bringing down costs like PCBs Jeri doing “home etching” (making silicon at home) Building the meme project on TT02 GIF construction set Almost like a ROM on board, on each clock it exposes the next byte on paralell output Luni hasn’t submitted to each tiny tapeout but is building a new project Browser assembler that runs in the handheld gaming: “Luni-Asm” cpu + gpu to get vector output Bitluni live youtube / Bitluni – twitch happens Weds at 8 pm CEST Community helps Writing memory controllers Bus master because internal SRAM is so expensive Expense of flash/ram is in IP People running test structures the tiles FPGAs, Gowin – 9K standard up to 25k Gabriel / Lushay Labs – Tutorials for FPGAs HDMI connector Some IP blocks from Gowin Yosys support VS code tools and simulation Gowin FPGA designer Learning clock domains Moving back to art Demoscene came from the cracker scene Different categories / limits 4K category only allows 4K of memory for images and sound (generated) White demo competitions Contact bitluni github twitch…
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