EP#7: The Art of Retention Force

PDA - Parkers Death AmpGoing to do a restoration on it and a recoverNeed to get rid of the death partsSome scary stuff after looking at the schematicChat GPT-3AI computer model for conversations / text generationPeople have been putting assembly into and and asking for notes on what the code doesThe AI sounds very sure of itself when giving completely wrong answersSuggested as a replacement for general internet searching How do you know what data it is pulling from or if it is even correct?Could push us further down the slope on the reduction of critical thinking in our societyReduction of solid researching skills“What connector should I use for my power distribution module”CNC update:Anodized parts for the brackets are completedExtruded aluminum for the strand is on orderGoing to be a while till another update

10 Joulu 20221h 3min

End of 2022 Engineering Questions?What trends in the past few years have changed PCBAs the most in the last few years? Weird SMT packages are starting to become more normalPCBs themselves are being used more as a structural part of the overall productWhat do you think will be the next “big” thing that will change the way EEs design PCBs? Rigid Flex changed the way compact consumer devices where designedAdvancements in mosfet technologies and materials increased power densitiesPDMListener Questions During the project do you plan on hosting it so it’s accessible somewhere like GitHub?Why plan for peak currents on constant current rating on the pins?What are the plans for customer connections? StarWars Christmas Special will be December 13thReturning Cast! Roz, Chris Kraft, and HyR0n!

2 Joulu 202256min

Louis Rossmann’s fresh start in Austin, TxMoved his business from New York to Austin, TexasLearn how to open and fix thingsClasses will be freeMercedes Makes Better Performance a $1,200 Subscription in Its EVsSubscription to make your car vroom vroom fasterAcceleration from 0-60 mph is said to improve by 0.8-1.0 seconds and the overall characteristics of the electric motors are supposed to change as wellMicrojet Spray SystemStarted 3d modeling the ideaAmazon linkVenturi Mist system with separate air and alcohol controlsMultiple ball joint nozzles that are individually adjustableStarWars Christmas Special December 13th?

28 Marras 202256min

Jeep Prop Fan ThingyJeep Prop Fan thingySpec SheetConnectors The Quest for 25 AmpsTE Connectivity 1-1418362-3Pg 63 of this catalogHaltech released a new PDM10 8A4 25A2 Push PullArduino OptaArduino's First Micro PLCsupporting standard languages including LD (Ladder Logic Diagram) and FBD (Function Block Diagram)STMicro STM32H747XI dual-core microcontrollerOpta Lite, Opta RS485, Opta WiFiHigh-power relay switching (4 x 2.3 kW)ManimEpisode 340 Necrobiotic SynthesizersFinally got it installed and playingLooking into circuit animation

18 Marras 202255min

November 5, 2022 - Extra Life RecapImprovements to the scriptThank you to everyone that hung out, supported, and donated!What is next for CNCParametric cnc model in fusion Model by Ed Frazierhttps://grabcad.com/library/parametric-cnc-router-1Changed to a 5x5 cutting surfaceAll 8020 construction with good bit of milled aluminumAdded a 40 series tableATP-5 aluminum by vista metals https://www.vistametals.com/assets/pdfs/products/atp-5-precision-tooling-plate.pdfPrecision tooling plateCast aluminum 5000 seriesCan be welded and about 5% lighterExcellent corrosion resistanceRMS value of 15 to 20Thickness tolerance of +/-0.005Good flatness tolerance Building up Z axis after the podNext steps:  Finish drilling and tapping all the holesBuff all of the surfaces with scotch brite wheelsAnodize

16 Marras 202256min

Python Demo for Extra Life APIStream Date: November 5th, 2022Python to OBS functioning!Websockets. What are they? HTTP is unidirectional where the client sends the request and the server sends the responseWebsocket data is continuously pushed/transmitted into the same connectionOBS has a built in local server that you can establish a websocket with another applicationPython module obswebsocket Provides a wrapper for all the OBS websocket functionsCan basically control anything in OBS it seemsDocumentation is a bit lacking and module is out of dateBuild animations and transitions in OBS and modify them with the python connectionBuilding a donation progress tracker? Signal switching tipsManeuvering signals around your designMethods of switching on and off portions of your circuit SeriesShuntSeries-shuntRelaysDG series of analog switches Virtually every configurationsingle, dual, quad SPSTs and SPDTs, 4:1 and 8:1 multiplexersMany have separate control and signal voltage inputsEstimating project timeFollow up from slackJosh Pieper - DoomcheckTakes in a text file and uses probability distribution to estimate timing for projects

4 Marras 202246min

Python Demo for Extra Life APIStream Date: November 5th, 2022Functionality so far Check Extralife API for donations This is done with the requests moduleThis endpoint seems to return old and new donationsThere isn't a “new donation” end point it seemsGet the donation IDs and compare them to a local file Local file is made with the pickle modulePickle allows you to take any data structure in python and “package it” into a binary file for storage. If there is a new donation ID that isn’t in the local file Queue up a random audio clipRecord the donation ID to the local fileAudio is placed through the playsound module Weird “bug” that short audio clips get cut offAdd a little sleep after the call to get around itAuto parses the audio folder for the files Looks into audio fileGets all the file namesAdding a new audio clip is as simple as dropping it into the folderPreventing truly random files Made a rotating bufferUsed the collections module to implement a bi-directional “stack” Think like a bitwise shift but with an array of stringsMultithreading! Threading module used to setup the API and Audio player queues API runs every 20 secondsAudio player runs every 30 secondsIf a new donation, global mailbox variable increases one for each new donation.Audio player runs and looks at that global variable. Threading has a “lock” function to prevent race conditions on that global variable.What is next? Play graphics in Open Broadcast SoftwareOBS has some python hooks that I am just starting to learn Chip Fab JobsNeed practically every engineering disciplineMechanical to design and maintain equipmentChemical for designing the masking / chemical bath processesElectrical for testing and validation Estimating project timePCB layoutNew project revision About 1600 partsLots of duplicatesThings that impact timing Components Parts with pours and complex groundSpecific trace routs like differential or snake tracesLayersDuplicationRest dayCleanup day

28 Loka 20221h

November 5, 2022 - Extra LifeHaven't had a chance to work on this yetGoing to stream working on it?Adventures in injection moldingPINNACLE 5112C38% haze - this is pretty low. Any lower and it would be considered “clear”Low melt flow, excellent processability - VoidsTwo ways to create diffusion HazeSurface TextureJeep Prop Fan Half bridges for each outputCurrent sensing INA219Inputs Found a product that will do the thermocouples on canbusInstead of that crazy LTC2986 chip Just expose an ADC 0-5V Connectors are the hardest part of this project so far Dictate the entire specificationsRFAB2 Lab - an expansion of the RFAB1 LabSept. 29, TI announcedt began initial chip production at RFAB2, a new 300-mm analog wafer lab in Richardson, TX300 analog fab digital isolatorEthernet transceiverbrushless DC motor driverdigital-to-analog converter100M units/day within a few years

23 Loka 20221h 1min