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#circuitdesign

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Embedded Podcast

This week on Embedded, Chris and Elecia talk about books, courses,, alternate podcasts, electronics, statistics, journaling and some Winnie the Pooh.
Join the chat here: embedded.fm/episodes/507

The transcript( embedded.fm/transcripts/507 ) from the show is also available now!

Thank you Mouser Electronics for sponsoring the show!

#NewPodcastAlert #TechPodcast #EmbeddedSystems
#IoT #ElectronicsDesign #HardwareEngineering #Microcontrollers
#CircuitDesign #STEMEducation #continuouslearning

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Flounder

How would I go about building a 60Hz passive oscillator? I'm trying to design an LRC circuit to measure the AC hum in my apartment but even with the biggest capacitor I own the dimensions of the coil are crazy, on the order of meters.

Also because the capacitance is so high the Q isn't great...

Can I salvage this with a ferrite core? or do I need a different kind of circuit

#electronics #circuitdesign technically not #hamradio but I got the idea from an old antenna tuner

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Kevin P. Fleming

I could use some suggestions from electronics geeks.

I've got a need to control two active-low inputs to a buffer IC in an 'exclusive' fashion: only one of them can be low at any moment in time. I've already got pull-up and pull-down resistors to ensure that they start that way during powerup.

I'd been planning on just connecting them to a pair of GPIOs from the microcontroller, but I'm concerned that during reset, if the normally-low pin was being driven high, there will be a short time when both inputs will be low as the MCU outputs move to high-Z... I can't guarantee that the reset in the MCU will cause both pins to go to high-Z simultaneously.

Is there a straightforward circuit I can drive from a single GPIO to generate a low signal on one of two outputs in a 'break-before-make' style (to abuse an old relay term)?

The reason that I need to do this is that two of the buffer's outputs are connected to two of its inputs, so if both control inputs are low at once that will generate a circular connection and I have no idea how the buffer chip will behave.

#Electronics#CircuitDesign
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Emily

Just ordered parts for a very (very) old project of mine. I started this well over a decade ago to support a platform of different display types for clocks (my time nut phase.) It's unfortunately large to fit that format I had before. Moved from a PIC18 to an ESP32-S2-Mini and hoping to get back to my Nixie Tube Clock project. (Don't bother to google as never published it).

Image of Emily's lovingly designed OpenClock design from many (many) years ago. It's displayed rendered in Kicad's 3D rendering view. There's some components visible that had 3D versions added
#pcb#kicad#time
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Laurabunny

(Tagging electronics folks, feel free to respond or not as willing/able.)

I'm doing initial research to design a custom battery mgmt/charge/balance circuit for a prototype. 4S/5S LiPo (nonprotected), 90Wh, 12A discharge. It needs to run the device while charging, like a laptop.

Any advice or resources on circuits/architecture/ICs, key safety req's? I'm a professional circuit designer but not experienced w/Li batteries.

Thanks!

@cmb @gsuberland @chris_gammell

#circuitDesign#electronics
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𝓜𝓪𝓻𝓬 𝓐𝓷𝓰𝓮𝓵

🔧✨ Nouveau projet électronique !

Voici ma dernière réalisation : une cartouche MD FRAM. 🕹️💾

📸 La carte a été conçue avec des composants de haute qualité pour des performances optimales. Vous pouvez voir les puces RAM CMS pour sauvegarder et d'autres composants essentiels ...

🔍 Note : L'EPROM est positionnée au centre pour montrer le résultat final, mais elle n'est pas encore programmée.

#Electronics#RetroGaming#Megadrive
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Sean Boyer 🇵🇸 FREE PALESTINE

Do YOU have experience designing #usb3 or #usbC circuits? How about implementing I²S audio?

I'd love to chat, and/or work together on an #openSource, budget-friendly, and VERY high quality (24bit/192K) 8 channel #usbAudioInterface.

I'm basing the front-end on the incredible differential instrumentation amplifier #INA217 by #burrBrown. We're talkin' #midas competition #preamps into a BB #adc 😎.

I could really use help with the usb implementation.

#circuitDesign#electronics#i2s
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Søren Kjærsgaard

Designing a filter for a friend, it’s a one off, meant to be used in an industrial test setup. If it works the way we imagined, the filter will be tested and verified at a calibration institute, so I decided to order a bunch of quality parts and pick the ones with the lowest tolerance.

Had too much coffee ☕️ tonight, so why not test the components? 🤪

The resistors, rated 1%, are really precise, waaay better than that. So I can use whichever of them, that’s handy.

The capacitors are just inside the 5% tolerance, measured at 10kHz. And lucky for me, there is exactly 3 of them almost bang on the needed 150nF. Perfect 👌🏻😃

Stay tuned for more episodes of this little project 👍🏼

It’s getting late… tomorrow will be a tough one 🥱 😴

#electronics#electronicsengineering#circuitdesign
Public
Jew Of the Day

✡️ Today's Jew of the Day is John McCarthy!

John McCarthy was a computer scientist, the creator of the Lisp family of languages, and one of the founders of artificial intelligence. McCarthy's contributions to computer science are vast and include fundamental ideas around how we use computers today. In the late 1950s, his discoveries around recursion, symbolic computing and lambda calculus lead to the LISP, as well as logic programming.

While working on Lisp, he pioneered the invention of automatic memory management and garbage collection, and later pioneered time-sharing- which is fundamental to multitasking. He helped found the MIT "Project MAC" as well as the Standford AI Lab.

McCarthy won many awards in his life, including the Turing Award, the Kyoto Prize, the National Medal of Science, and the Benjamin Franklin Metal.

#JewOfTheDay#ComputerScientist#AI
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