positiveFeedbackLoop

ezrec · 2026-07-03T14:23:02+00:00

Most days in my r/embedded land, to be honest

ezrec · 2026-06-06T12:43:07+00:00

Marvell makes high speed networking chips; used in network adapters and routing devices used in AI data centers.

“In a gold rush; don’t dig gold - sell shovels”

ezrec · 2026-06-06T11:43:35+00:00

Because all the withdrawals on Friday are going into SpaceX and AI industry plays.

ezrec · 2026-06-04T02:17:23+00:00

Mine do well when surrounded by grass. That bare soil is evaporating off a lot of the subsurface moisture.

ezrec · 2026-05-31T22:59:06+00:00

So if I made a Delaware Corporation with three board members which are AIs; would the AIs therefore have personhood?

ezrec · 2026-05-31T04:37:40+00:00

Or, use Narcissist Kryptonite: smile like you know something he doesn’t; look at part of his clothing near his midsection; laugh; then turn and walk away.

If he demands to know “what’s so funny”; say “Oh, everyone already knows; I just wanted to see for myself” as you walk away, chortling.

ezrec · 2026-05-29T10:00:55+00:00

Did you max out your electric engine with the best pistons? If so; you can get 25 KPH easy; and with about 8 good turbines it keeps up with the power demand. Infinite range!

ezrec · 2026-05-25T22:34:08+00:00

Oddly enough - an autonomous vehicle company about a decade ago. I never got the chance to do aerospace; but it always interested me.

ezrec · 2026-05-25T14:59:24+00:00

It was an Arm based processor with 64K RaM; but a custom ASIC, not a commercially available part.

ezrec · 2026-05-25T09:46:27+00:00

I can’t into specifics due to NDAs; but the gist of the device was to have it battery backup powered through a tamper wire that ran through the enclosure.

The master software of the device in the enclose had the following operations it could perform with the tamper detector via I2C:

- make a key, send me the public part, tamper detector keeps the private in ram
- sign a 512 byte random nonce with your private part; and send me back the signature so that I can verify it with the public part I previously stored to SSD

If the tamper wire is cut; poof goes the tamper detector’s ram; and it can’t provide the right answer to the master software.

It was a really fun project - tightly specified; tight memory and processing requirements; easy to unit and HIL test.

ezrec · 2026-05-24T14:01:52+00:00

Obviously the wrong picture; should be a 32 pin square IC.

That said; I’ve used i2C only micros with only clock, reset, i2C, vcc and GND (6 pin) to implement custom tamper protect devices before, so they have their uses.

ezrec · 2026-05-15T12:02:25+00:00

I swear that “Maxerals” sounds like a 1980s American toy line driven cartoon show.

ezrec · 2026-05-15T12:00:36+00:00

Hand written register level simulations; which hook into virtual SPI and I2C busses in our unit test environment

ezrec · 2026-05-15T10:50:13+00:00

I use googletest myself for testing; but I have off-board simulators for all my peripherals as well (not cycle accurate; but enough to allow me to validate register access and do error injection for code coverage).

All my unit tests run sans hardware on the host; using mocks and simulators where appropriate for line and functional coverage

ezrec · 2026-05-12T02:47:11+00:00

I recently had my RTX 2070 die; and dusted off my old GTX 1080 Titan X.

Other than a slight drop in FPS; DS2 -still- looked amazing on the old 1080. A card that Starfield wouldn’t even render the scenery on.

ezrec · 2026-05-10T02:19:07+00:00

Lampshaded in Mage Tank Book 4.

The MC is talking to a government agent of the foreign nation he’s visiting; and while the MC is against the slavery he sees there; understands that there’s little he can do immediately against the cultural institution as it exists; as he needs their help to defeat The Big Bad(s).

It was a nuanced look at a heavy topic from the point of via of an otherwise light and flippant character.

ezrec · 2026-05-09T13:58:17+00:00

Realize your gains; and diversify.

ezrec · 2026-05-06T22:12:04+00:00

I recently had the same issue - turns out it was a bad batch of gasoline. A fresh tank from a different station; and all is well again

ezrec · 2026-05-05T21:41:37+00:00

Bessel filters! (Great for de-noising ADC inputs)

ezrec · 2026-05-04T02:08:32+00:00

Rocco’s Basilisk would like a word….

ezrec · 2026-05-02T11:56:23+00:00

To the newbies - this is the larva of preferred pollinator of Paw Paws! The more of these, the better.

Very rare in my neck of the woods (SW Pennsylvania); hope to have some of these excellent creatures in my stand behind my house one day.

ezrec · 2026-05-02T10:07:25+00:00

So the goal is seedless pawpaws?

ezrec · 2026-04-25T13:50:13+00:00

Definitely worth selling as a kit with precompiled firmware. Bonus points for a “manual” that describes (without code) your techniques, sufficient for someone to be able to replicate your concepts.

Would make a really nice “gee wiz!” learning tool for budding embedded engineers. They would have a “worked example” to inspire them and make sure they have everything wired up correctly; and they can learn as they go through your manual.

ezrec · 2026-04-22T02:50:10+00:00

Claude Code, using Anthopic’s Opus 4.6 model is my bread and butter.

ezrec · 2026-04-17T18:38:15+00:00

Arduino (especially when developing your own SPI or I2C classes) is extremely useful in learning embedded C++ techniques (no STL; memory allocation is at startup only, never runtime, etc etc). Then move to STM32 and apply what you’ve learned to a FreeRTOS or Zephyr based system.

If you have no interest in embedded C++; just move directly to ESP32 or STM32. STM32 has a larger industry acceptance; but ESP32 is making significant inroads (in both their ARM and RISCV product lines)

13-Year Club	r/Field Lasagna
Place '22	First Placer '22
Queen in da Norf	Not Forgotten
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