EP#30: You won’t believe this ONE WEIRD Engineering trick

November 5, 2022 - Extra LifeContent for the streamAPI for ExtralifeCustom plugin that goes to a Duke Nukem Sound BoardTrying to get it to play gifs Working with Open Broadcast Software nowLive podcast Nov 22 in HoustonMicrochip woes?Microchip has got back to us about the firmware - no issues on their endSuggested using the command line interfaceOriginally thought pullups on the reset line but they are not needed Tried them with no luckJeep Prop Fan Recently talked about designing a PCM (Power Control Module)Essentially control all the none engine related functions in a carNeed a new name since it's not for the Jeep nor uses the Parallax PropellerRaspberry pi pico Do we do Arduino style C or Micro Python? Micro Python will be cool to try out!PIO will be used for controlling reactionary lights Turn signalsHeadlightsSolid State Relays are EXPENSIVE Mosfets for sureH-Bridge for bi-directional motorsCombine with OCTOPROBER?

14 Okt 202259min

November 5, 2022 - Extra LifeI play games for children's hospitalsRaised $5,169.42 last yearWas the number one raiser for the Texas Children's HospitalWhat game for this year?What should I make for the stream? API for ExtralifeDuke Nukem Forever and Aliens Colonial Marines Custom Stream plugin for the gamesLive podcast Nov 22 in HoustonHacking FR4 for light transmissionUsing FR4 as a light diffuserThings to consider FR4 material YellowBlue GreenGrayDistanceLED AngleLED brightnessLight Bleed PipesDividers  PCB Ruler ReduxJames Pleger from slack channel“Credit card” styleDifferent stackups of material

7 Okt 202243min

November 5, 2022 - Extra LifeI play games for children's hospitalsRaised $5,169.42 last yearWas the number one raiser for the Texas Children's HospitalWhat game for this year?CNCCalibration90Dust Collection 2/4/5/6 in pipeThinking I will do an overhead PVC solutionHave to design a skirt capable of interfacing with a 4 in hoseBattleship TexasGoing to try to get someone on to talk about the restoration PCB Ruler ReduxWhat do people want to see on them?What makes it actually useful? Live podcast Nov 22 in Houston?

30 Sep 202253min

Pool Shark Update!Wolfspeed fab for NC is latest on CHIPS Act list668,000 domestic manufacturing jobsGlobal Unemployment. Do we have enough people for this?What technology are they aiming for?Here’s the latest hot list of cool chip fabs coming to the USGlobalFoundries 180nm down to 12nmIntel OhioNew MexicoArizonaMicron Memory ChipsSamsung High end computingTexas Instruments 45nm+ analog, embedded electronicsArticles say it will complement other factories already in TexasTSMC 5nmWolfspeed Worlds largest silicon carbide manufacturing facilityMuch higher power devices with higher voltage capabilities due to large band gapFailure Friday - Break something at the office this week? We want to hear about it!Billed the wrong phase of a projectDry air means static buildup, I don't think my 3v test circuit appreciated being a path to ground :'-(I ran over a 3D printer with a forkliftSaw a customer supplied "napkin sketch" that stated 12'x12" (12 feet x 12 inches). "I read it as 12 inches x 12 inches, product was cut to that size."Customer was not happySparky sparky boom boomWhat to do to make your open source project more accessible - or more popularUse popular tool chains and environments for ease of access If the tool chain is not simple to install, offer a docker or really good instructionsDocument your process and have someone test your instructions!Cherish all feedbackIf someone has a problem, do not say "works for me" They may have found an edge case to fix!

23 Sep 20221h 8min

Differential probe design updateTrying to reduce part count - Want to make it simpleDecided to go with Caddoc 1776-C681 resistive dividers. Used this on the bias test system1:100 divider with high voltage, good tolerance and good thermal performanceChallenge is to get the dividers to fit3d printed caseAir Filter / CanisterTurned out great so far will have to see how it holds up under the heatPictures on the blogDigikey NewsletterCheck Out Digi-Key’s Stock of Toshiba’s Power Management and Circuit Protection Products Email received at 8:25 AMSold out by 9:14 AM Toshiba TPH9R00CQH

17 Sep 202247min

MEP EP#343: Bricking BadBricking Microcontroller - Watch those fuses Pic, AVR, STM Atmel ATXMEGA16A4U AVR studio and microchip studio AVRDUDE Air Filter / Canister Long Running Project between Chris Kraft and Parker Mods on the red Jeep necessitated moving the original air cleaner First design was all 3D printed around 2016 / 2017 This is right around when 3D printing large objects like this started to get fessable on a hobby printer PLA glass fiber Worked but the material couldn’t handle the underhood temperatures Second design was welded together out of steel Material was due to tool and cost constraints Working to this day Used a filter that is not manufactured anymore Third design is a combination of everything Parker has learned about 3d printing Polycarbonate seems to hold up in under engine bay temperatures Endcaps printed in this material Heat set brass inserts for screws Aluminum mounting brackets for 3” hoses  Carbon fiber for the main body

9 Sep 20221h

MEP EP#342: Hackery ExpertsHyR0n Mathematician Computer Scientist AND!XOR employee of the month Working on badges and things Hackery Previous Podcast Episodes Incognito Mode episode number 69 Arduino, The Gateway Drug To #BadgeLife episode number 109 Espress-ify? Designing Products Around the ESP-32 Platform episode number 144 Feel the Hum episode number 183 Better Encryption than Zoom, Firmware Stacks episode number 238 And a couple of the Starwars Specials DEFCON 30 AND!XOR Badge Its a watch, with some watch things, hacker apps (TV B Gone, BLE Interrogator), Games, & Challenge Give them away for free at DEF CON following sponsorship from companies and philanthropists. Off the shelf device with hacked firmware LilyGo T-Watch 2020 V3 But how did we get there? A story of supply chain woes Original Watch idea - supply chain issues and crazy costs / quantity buy requirements Look at consumer watches we could hack (PineTime, then LilyGo) It wasnt just software, a true micropython implementation was done for firmware Always interested in python We always lived in a C world Makes hacking it easier for end user Micropython vs Circuit Python The Hacking Challenge - BENDER  Flashing Party - Things you should think about - i.e. Design for Drunk Hacker Production You’re going to do the same thing thousands of times, what do we automate? Loop script for provisioning Push bare minimum over serial, then use wifi to complete Turning screen green once flash done and charge at 100% Other thoughts? Really different than what we do, was really fun People like bling more than function, but …

2 Sep 202252min

MEP EP#341: Project Snackey RecapProject Snackey at Defcon30 What we did CTF Codes What went wrong What went right People’s reactions Improvements for next year Lock Picking Village Hardware improvements Physical Security

26 Aug 202257min