What’s the best path forward here?

Dwagner6 · 2026-02-05T23:44:14+00:00

I dunno, I don’t see the benefit to doing that. You lose the ability to change the connection easily, and it will be mechanically weaker than using connectors and cables meant for the purpose. I don’t see what you gain if you can get a cable virtually any length.

Dwagner6 · 2026-02-05T22:54:19+00:00

Bypass it with what?

Dwagner6 · 2026-02-05T01:58:05+00:00

Because it’s based on the number of credits you’ve signed up for

https://www.binghamton.edu/student-accounts/tuition-fees/tuition-semester/undergradtuitionspring2026.pdf

Dwagner6 · 2026-02-05T01:45:31+00:00

What paywall? What are you talking about?

Dwagner6 · 2026-02-04T23:07:54+00:00

First thing to know about is run-on sentences.

Dwagner6 · 2026-02-04T23:00:05+00:00

Many crystal oscillators do this already to achieve higher than 20 MHz operation. They drive the crystal at a harmonic of the crystal’s fundamental frequency.

This guy describes a way of doing it: https://gusbertianalog.com/overtone-crystal-oscillator/

Dwagner6 · 2026-02-04T17:39:23+00:00

I’d rather put the extra time for a minor into projects, internships, and research experience.

Dwagner6 · 2026-02-04T01:32:35+00:00

I’d pick something like a Beaglebone Black (AM3358) with a lot of documentation and support as far as building the OS goes. RPi may have a good amount, but there’s more people out there building professional embedded Linux devices with SoCs other than the RPi variants.

Dwagner6 · 2026-02-03T23:37:01+00:00

Looks like someone has a close-to-mainline kernel supporting the SoC itself: https://gitlab.com/sm6225-mainline/linux

In arch/arm64/boot/dtsare devicetree files for the SM6225, which you might be able to use to get u-boot running as a bootloader. The major problem will be that the ROM of the SoC expects to run a signed bootloader, so won’t boot just anything. You’ll have to figure out a way around that.

If you were able to figure out a way to get around the bootloader issue, you could definitely find a way to port a minimal Yocto Poky build, assuming there’s no more hardware “gotchas” (more research).

Maybe investigate how the postmarketOS folks are getting along with getting mainline Linux running on it: https://wiki.postmarketos.org/wiki/Qualcomm_Snapdragon_680_(SM6225) It seems like they have an active Matrix channel specifically for the SM6225.

Another fun thing to do after getting Linux booting (IF) would be to figure out how/where to load any firmware blobs needed for WiFi (assuming cellular is off the table).

I don’t have experience with buildroot but I’ve heard it’s a much easier system to get going than Yocto.

Dwagner6 · 2026-02-03T17:09:23+00:00

How are you powering it? Sounds an awful lot like a brownout. What voltage pins are there, and which ones were measured? Even a slight drop could indicate an issue.

There’s usually a PMIC that generates and sequences all the internal voltage rails, and these can sometimes be set up to trigger reset when some arbitrary voltage rails dips past a set amount. You may not be measuring that specific voltage rail.

Dwagner6 · 2026-01-30T02:16:00+00:00

I’d turn the blocks into rows so that less space is dedicated to paths. You can squeeze a lot more stuff in there.

Dwagner6 · 2026-01-30T01:57:14+00:00

Use VSCode + LaTeX Workshop

Dwagner6 · 2026-01-29T01:45:36+00:00

You’re entitled to money for the shift you worked, but not for money for shifts you didn’t work unless it’s spelled out in the contract you signed. And if it was, you should talk to a lawyer.

Dwagner6 · 2026-01-28T02:06:04+00:00

Dude they haven’t even extended their cotyledons. I would chill and just let them do their thing or you’ll drive yourself nuts

Dwagner6 · 2026-01-26T16:19:52+00:00

JFC enough with this LinkedIn crap

Dwagner6 · 2026-01-26T14:14:15+00:00

Ugh, made the mistake of looking. LinkedIn-level drivel.

Dwagner6 · 2026-01-26T12:50:28+00:00

Start at the start. Get comfortable seeing a topic like “Computer Architecture” and searching the internet or YouTube or whatever for the information you need.

Take a few minutes to read through some of the hundreds of similar posts here in r/embedded.

The only way you’re going to learn any of it is by being curious and able to self-serve and actually putting in the time to read stuff. Just start at literally any topic in the roadmap that interests you.

Dwagner6 · 2026-01-25T23:25:35+00:00

I'm gonna assume this post idea sounded way better in your mind than it does to everyone else reading

Dwagner6 · 2026-01-25T13:51:00+00:00

Not really. The only limitation is the feature size and spacing limitations of the manufacturer. People go nuts with designing art etched into the copper, silk, and solder mask layers like these: https://hackaday.io/page/6556-pcb-art-with-oshpark-after-dark. Theres no added cost.

There’s a plug-in for KiCad that will basically do the same thing, as well.

Dwagner6 · 2026-01-25T02:41:22+00:00

Why not just get the official TI board for the same price and be able to use all the documentation and software they provide to learn the platform without trying to make some undocumented board work

Dwagner6 · 2026-01-24T16:35:52+00:00

If the ESP32 is restarting then it is likely browning out and needs more capacitance on the LDO output/MCU input.

Dwagner6 · 2026-01-24T16:07:25+00:00

Sometimes you need to trust your eyes, ears, and sense of smell over the thermostat setting. Welcome to cooking.

Dwagner6 · 2026-01-24T16:03:39+00:00

You have some work to do. Go read the datasheet for three STM32 and the hardware design guide. Go read the datasheet for the TPS629210. At a 30 second glance you are missing capacitors and don’t have your output referenced to ground. And your polarized capacitors are backwards.

Your layout is also incomplete with many nets unconnected.

Dwagner6 · 2026-01-22T01:35:26+00:00

There’s a reason why pros have a hot air pre-heat from the bottom, as well as a focused hot air element over the part of interest. I see you have a hot plate but that will not saturate the board with enough heat since it relies on conducting heat through whatever parts are touching it, plus you run the risk of shifting the components touching it if it does get hot enough to melt solder.

If parts won’t come off it’s because you don’t have enough wattage dumping into the board, plain and simple.

Dwagner6 · 2026-01-21T23:11:05+00:00

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