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MEP EP#281: Through Hole Manufacturing Through Hole Manufacturing Processes Hand Soldering Soldering “robot” Wave soldering Design Criteria Pallets Selective soldering Design Criteria Keepouts Lead Forming Pre purchase? Forming with a die? Using hand tools? PCB design Holes Non circular? Annular rings IPC stuff IPC-2221 Generic Standard on Printed …
 
MEP EP#280: Don't Worry About It Adventures in plastic injection molding Beating the bubble Finding a new method of shooting the material to adjust for issues Change ejector pin depth Change material Light bleed Texturing Right to Repair is going global NPR business National Farmers Union Nebraska Legislature Bill 543 Getting a pro right to repair …
 
MEP EP#279: Avoiding The HR Pit of Doom, Resume and Interview Tricks for Engineers Engineering Resumes The main goal: To start a conversation The resume is intended to give a snapshot of you not to be your autobiography The person doing the interview probably has other tasks that they have to accomplish Your interview is important but it is likely …
 
MEP EP#278: Design With Manufacturing - Altium and MacroFab Ted Pawela Altium's Chief Ecosystem Officer Head of Nexar, Altium's cloud business unit Holds a M.S. in Engineering Mechanics from Michigan State University, a B.S in. Oceanographic Technology from Florida Institute of Technology and an M.B.A. from IE Business School, Madrid, Spain Chris C…
 
MEP EP#277: Bunch of Nibbles Tasty Chips segment Harwin EZ-Cable Clips Mac-Eight CZ series Update - E-Z Hook Insulation Piercing Wire Clamp - 8507 Built a housing to isolate the wire clamps COM port snooper / sniffer? Ended up using 'Free Serial Analyzer' Automating Testing Clock Drift Using an oscilloscope? SCPI or some other method? 115 pages of …
 
MEP EP#276: Skippy Documentation Fake LM338 Voltage Regulators? X-RAY results Should we Xray legit LM137 and see if the XRAY matches? SCPI or Standard Commands for Programmable Instruments IEEE 488.2-1987 Send command strings over serial to configure and get results from test equipment Test equipment mostly adhere to this with some weird gotchas CO…
 
MEP EP#275: Log Stepping Revision Control Log stepper Exercise in madness 24 position stepped attenuator 1db steps with step 0 being -infinite and step 24 being 0db attenuation Requires lots of non standard resistor values Constant total resistance Excel sheet Make before break operation Revision workflow How do you document and handle revisions fo…
 
MEP EP#274: The Pinch Load Thermal Management Part two! Interesting thermal management designs and devices Copper “fingers” Thermal Jumpers Common DRC Problems Annular ring Copper to Board Edge Tolerances of the checks? Why? -0.1mil or -0.00254mm Record Player Deconstruction Tube Amp Schematic Possible Fake components? From the thermal discussion f…
 
MEP EP#272: The Digital Mattress Right To Repair Ease of opening for repairs This sounds great but I have some thoughts Reason why phones are hard to open now Security screws only keep out people that probably shouldn’t be opening the device anyways Ultrasonic welding and potting? Access to manuals What if repair manuals don't exist for a product? …
 
MEP EP#271: The Right to Repair Right To Repair Dot Org The Right to Repair Electronics refers to government legislation that is intended to allow consumers the ability to repair and modify their own consumer electronic devices, where otherwise the manufacturer of such devices requires the consumer to use only their offered services. This already e…
 
MEP EP#270: Radio Frequency Eyeballs Cool XLR connector with a smart method of assembly NC3MD-H-BAG NC3FD-H-B XLR with two parts - one for mounting to the enclosure and the actual connector. Assemble separately - allows you to test the electronics on the board Insert and turn a small screw and lock the connector to the body Keysight scopes are now …
 
MEP EP#269: Illuminati Moment Fan controller for Jeep MCU P/N: G80F960AP 8051 core Chinese Generic MCU Override signal passes through a diode then pulled up with a 10K to 5.0V Diode to prevent back feeding voltage if you slap 12V onto it Mosfet inverter as the fix! PinoTaur REV 4 has Arrived! Goes into final testing for production certification! RG…
 
MEP EP#268: Avoid The Extremes Fan controller for Jeep Brushless fan temperature controller Nothing fancy but the “override” signal is ground triggered! Will have to invert the A/C compressor signal with a relay Controlling PCB cost What are the knobs that can be turned to adjust the cost of the PCB itself? The easy ones Size (not necessarily recta…
 
MEP EP#267: Honey, I Shrunk The Parts Tradeoffs on component sizes "World's Smallest" Claims Can Come With Trade-Offs Design and Production considerations when going small Different PCB Design Rule Checks PCB pricing Via in Pad Escaping Components Silkscreen Part placements Assembly documents Tooling Paste Jetter Stencil coatings STICKERS/Labels fo…
 
MEP EP#266: The Expert Design for Manufacturing – Beyond the Digital Domain Webinar that Chris Church (Co-Founder of MacroFab) will be co-hosting with Edwin Robledo of AutoDesk. Building a Program and Testing procedure for your first production run Take lots of pictures Keep it up to date and version controlled Hand off the procedure to a colleague…
 
MEP EP#265: NuFuel and Gas Classic Resealing 12oz cans? FAIL! Worked till can shaken a bunch Improvements Working on finding a softer sealing surface Currently using a Shore 55A neoprene rubber sheet Increase seal pressure on can Carmakers wake up to new pecking order as chip crunch intensifies Follow up from last week's discussion on Auto industry…
 
MEP EP#264: Electronic Wear Items Tesla Recalls Cars With EMMC Failures, Calls Part A ‘Wear Item’ Wear items on cars are designed to be “easily” serviced Is this just a cop out to avoid warranty issues and recall problems? If the EMMC is a wear item it should have a recommended service interval but it does not Derek Fronek from the slack channel: “…
 
MEP EP#263: Hoarders Edition Chris Carter Owner of Mercury inc, a design consulting firm with expertise in electrical mechanical software and firmware development Was last seen on MEP episode 244 Comic Con for Engineers DFM For Safety As in Supply Chain Safety Difference in projects Project specific information Based on price and quantity breaks fo…
 
MEP EP#262: Flex PCB Primers Parker Robert Feranec Published a video about what to consider when selecting chips for your new board design. Don’t want to steal Robert's content so go check him out. Hardware design and PCB Layout online course Comprehensive Power Supply System Designs for Harsh Automotive Environments Consume Minimal Space, Preserve…
 
MEP EP#261: Critical Path Components Parker What can you do to help alleviate component shortages and lead times in your design Last week we talked about automotive component shortages Passive components Most passives it is easy to find substitutes Check your specifications Components that have extraordinary specs for there package size Active comp…
 
MEP EP#260: A Couple Months Ago... Parker Homebrew going big Uncle runs a brewpub down in Alvin, Tx Going to help him repair and rebuild the brewery for post COVID Building more electrical boxes Chip shortages hit even as auto chip sales climb Ford and Fiat Chrysler are temporarily closing factories due to limited supplies of electronic components …
 
MEP EP#259: Troncrete Parker Your C@$% Is Mine Now We actually brought up the security report on this device back in Oct 2020 on episode MEP 245: K-factoring A Gumbo Qiui, the China-based manufacturer of the device, which is aptly called Cellmate, did not respond to a request for comment Stephen Solar Freaking Roadways! First talked about on MEP EP…
 
MEP EP#258: Chainsaws, Wasps, Doom, and Gloom Parker PCBA Lead Times in Q1 2021 Supply chain disruption in 2020 started with the Lunar New Year and quickly extended into the COVID-19 2021 LNY falls between February 9 to February 16 COVID-19 Vaccines Logistic capacity being reserved for the vaccine distribution 10 Day service at MF will be the bigge…
 
MEP EP#257: Viciously Different Creams Parker The ole ordered a 0603 and it was metric instead resulting in an 0201 imperial chip component. 0.6mm x 0.3mm = 0.024” x 0.012” 0201 imperial chip size only size that does not match the actual size Imperial 0201 is 24mil x 12mil... not 20mil x 10mil like the name implies Imperial 0603 is 60mil x 30mil 06…
 
MEP EP#256: Color Clashing Chip Consolidation Parker Whats up with the Cat feeder unreminder? Still waiting on components to test with PinoTaur taking priority Email PDFs of wiring harnesses Jeep Fan Project Revisit Jeep Fan was a project idea to take sensor input from all over the Jeep and display on a VFD Universal Multi Gauge exist but kinda suc…
 
MEP EP#255: Fifth Annual MacroFab Star Wars Christmas Special - Neo Jedi Parker SPACE TRASH in Star Wars Recently ESA commissioned the world’s first space debris removal ClearSpace-1 which will launch in 2025 Would space trash be a concern for the galaxy far far away? I don’t think the Empire cares all too much about space garbage since they just j…
 
MEP EP#254: Ridiculous Relay Ratings Parker PinoTaur updates REV 4 Automotive relays are not certified to run at the voltages we need G2RL-1A-E-CV DC12 Max voltage rating is 300VDC “Rated” current is 24VDC at 16A G2RG-2A-X DC12 Rated at 500VDC at 10A Looking at other relays used for this purpose in production machines… Am I missing something in cho…
 
MEP EP#253: Benjamin Jordan of Autodesk Benjamin Jordan A Computer Systems and PCB Engineer with over 25 years of experience in embedded systems, FPGA, and PCB design Is an avid tinkerer and is passionate about the creation of electronic devices of all kinds Holds a Bachelor of Engineering with First Class Honors from the University of Southern Que…
 
MEP EP#252: Kicking Troglodytes Off The Stage Parker PCB serial numbering or other unique marking I have batches of boards and need to put some unique numeric identifier and a MAC address on each board. Besides stickers, laser etching, scratching or DIY stencil and paint, what are folks doing? PinoTaur REV 3 boards arrived REV 4 changes already ;) …
 
MEP EP#251: Loopholes or Equivalent Parker Wiring Harness update Wire Jacket Temperature rating Wire strandedness or number of strands Labeling Requirements? Treatment to pigtail end RoHs? The Untold Story Of The Bug That Almost Sank The Dreamcast's North American Launch Audio IC hardware layout problem Floating input pin causing the IC to flip int…
 
MEP EP#250: Artisan Sudo Toasters Parker EXTRALIFE charity update How Biden may handle China and the electronics trade CHIPS Act Creating Helpful Incentives for Producing Semiconductors Incentives for the construction of semiconductor manufacturing facilities and equipment Calls for $300 billion in new funding over four years for R&D and breakthrou…
 
MEP EP#249: How Soft Are Your Diodes? Parker Signed up for the EXTRA LIFE charity this year to raise money for the Texas Children's Hospital This Saturday (Nov 7th) Parker will be broadcasting a 24 hour video game stream Will be playing the Half-Life 2 video game all the way through This includes the two episode expansions to the base campaign Diff…
 
MEP EP#248: Keeping The Spirit Costs Extra Parker AMD to buy Xilinx for $35 billion in stock Wasn’t that long ago that Intel bought Altera Why such a merger? Sharing topography, technology, and manufacturing techniques Tariffs and the Election Engineers and Manufacturers have been decoupling from China for the last 4 years The big question is what …
 
MEP EP#247: To Bake an Apple Pie Parker PCB Stackup Why is it important to manufacturing? Who should define it? CM? PCB Fabricator? Designer? PCB Bodges Your worst bodge Most proud bodge? DIY Glycol chilling? Chiller Daddy Pump Diverter Stephen Brexit and the UKCA Mark New regulatory mark to make things easier… Goes into affect 1 January 2021 The U…
 
MEP EP#246: Doing Something Magical Parker Physicists build circuit that generates clean, limitless power from graphene University of Arkansas physicists Energy harvesting the thermal motion of graphene Without getting all quantum about it, it seems to work by configuring the graphene as one electrode (or both) of a capacitor. As the graphene flaps…
 
MEP EP#245: K-Factoring a Gumbo Parker Security flaw left ‘smart’ chastity sex toy users at risk of permanent lock-in List to podcast for additional information... Stephen Fusion 360 has changed their personal license subscription model All of these went into effect on Oct 1 Project storage is limited to 10 active and editable documents Exports are…
 
MEP EP#244: Comic-Con for Engineers - Chris Carter Chris Carter The owner of Mercury Inc. Mercury Inc. is a design consulting firm with expertise in electrical mechanical software and firmware development DFM for PCB Assemblies Industrial Design What is this? Special Assembly Unique processes Sequences and events Design for Serviceability Documenta…
 
MEP EP#243: Schematics and Connectors, Name a More Iconic Duo... Parker Battery Charger debacle update Two batteries recovered, One failed Amazon Sidewalk draws electronics from among TI, Silicon Labs and Semtech Amazon Sidewalk, a new shared wireless network for IoT consumer device DXF to Board outlines? Eagles DXF importer doesn’t work all too we…
 
MEP EP#242: The Heartbeat of Cats and LEDs Parker Battery charger and maintainer died Took all my batteries with it Company is replacing the unit Nothing looks particularly wrong with the PCB Assembly besides it being gross SF1565SG Current Mode PWM Controller FQPF12N60C Fet used in the PWM Controller HT46R004 HolTek MCU Cost Effective? Cat Feeder …
 
MEP EP#241: Failing to Electrocute the Chicken Parker Bit of feedback on a live stream People suggesting YouTube live Will set this up for episode 242 The little things no one sees that make projects take forever 3D printer update completed New fans TI calls for lower-cost sensors to boost robot adoption “We don’t see as many robots as we’d like” E…
 
MEP EP#240: Disturbed Solder Accuracy Parker Got a fully automatic screen printer! ESE US-2000X Potentially lower our minimal paste size Twitch Live Stream podcasts? Amazon multimeter probes Stephen High voltage low current measurement Don't want to break the connection so a traditional ammeter isn't going to work Sticking with the read both sides …
 
MEP EP#239: Frictionless Spherical Cow Transformers Parker Garage Door opener hacking Converting my normal style garage door opener to a “jackshaft” style opener Reversing the direction of the A/C single phase motor? Split phase motors One phase is shifted with a large capacitor by ~90 degrees In my application I just had to reverse the wires and t…
 
MEP EP#238: Better Encryption than Zoom, Firmware Stacks with AND!XOR AND!XOR Previous podcast episodes: Incognito Mode which was episode number 69 Arduino, The Gateway Drug To #BadgeLife which was episode number 109 Espress-ify? Designing Products Around the ESP-32 Platform which was episode number 144 Feel the Hum which was episode number 183 Fir…
 
MEP EP#237: Ice Cream Solder Paste Equipotential Parker Cat Feeder Unreminder Started designing the parts and symbols in Eagle. Will post more on twitter as I build the components and put together the symbols Garage Door opener hacking Converting my normal style garage door opener to a “jackshaft” style opener Why? LiftMaster, Chamberlain, Craftsme…
 
MEP EP#236: Excited Electrons Parker Lead Forming Topic Tools 3D printed forms Best practices? Cat Feeder Unreminder Choosing a solar panel Solar Panels generally act like a current source across its useable power band Specifications that are important Power (Watts) - Max Current @ Peak Power Voltage @ maximum power point (Vmpp) Vmpp - Voltage @ op…
 
MEP EP#235: Solar Freaking Cat Feeders Parker Cat Feeder Unreminder Pulsing current to light LEDs http://donklipstein.com/ledlocup.html http://www.discovercircuits.com/H-Corner/lowpwrflasher.htm Timer IC LTC2956 Power Management Solar with super capacitors Panasonic BSG series solar panels Will have to do research on specifying solar panels AEM1094…
 
MEP EP#234: Bashing LEDs Parker Didn’t get to work on the Cat Feeder Unreminder but there are lots of interest and ideas in our slack channel! TheStumbler Found a 12hr egg timer. Defeats the purpose of building and learning a new embedded skill. Eric McFall E-Ink for the persistent display. This is a great idea. I will look through my parts bins fo…
 
MEP EP#233: Good Enough for a Bagel Parker The Cat Feeder Unreminder Bagel Pin Toaster Controller usable? PT8A2514APE MC14536B 24 stage stage counter with on board RC oscillator Stephen SPI Code Bytes Working on the second PCB revision of a product Code that worked on previous revision didn't work on the new prototype! Changed Chip Select pin for t…
 
MEP EP#232: Chonky Motherboards Parker The Cat Feeder Unreminder Different implementations to accomplish the goal Stephen Synth DSP replacement Korg MS2000 Was pulling an additional 500mA on the power supply Found a blown surface mount fuse The DSP chip XCB56362PV100 was hot to touch Replaced with part found on ebay Wasn’t sure if this part needed …
 
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