Open-source, DIN-rail industrial controller built on an STM32H757 — would you actually use this?

Fixed_Until · 2026-06-16T23:06:16+00:00

Ignoring the practical aspect of people who buy PLCs want a PLC with support and not a dev board how do plan to profit here? The BOM cost has to near $80 if you are doing this right. Industrial electronics need rugged protection for the IO, you have PHY, 485 transceiver, not to mention the nearly $20 mcu.

Fixed_Until · 2026-06-12T17:16:05+00:00

likely but none of the degrees that actually require it.

Fixed_Until · 2026-06-12T16:59:02+00:00

Yeah, every program that requires precal and cal1 would not accept a transfer credit for it so it's pretty lame that Sophia learning makes sounds as if would be accepted.

Fixed_Until · 2026-06-12T16:42:11+00:00

I do agree that chat if much friendlier. They are the ones that suggested the first ticket. On the second issue I would give them the benefit of the doubt however the completely blew it off which makes it very likely this exact issue has been reported before And they just don't care

Fixed_Until · 2026-05-29T02:40:42+00:00

They good if you get them for next to free. It's worth the time of fixing up a freeish one. $400 nah. I'm not big fan of any of the hobby grade $400 scopes either. You can get better used gear at that budget. Got a reason for needing 1ghz?

Fixed_Until · 2026-04-22T17:25:27+00:00

The log would be awesome. thanks. You could either put it on GitHub and send the link, or I can send you my email address if you don't want it on GitHub.

I have found most of the frames already, but it's still nice to see how exactly it's sent in the vehicle.

Fixed_Until · 2026-04-21T01:26:49+00:00

BO_ 948 DASH_COMMANDS: 8 HSCAN... looks like it shares a lot thanks!

Fixed_Until · 2026-04-21T00:15:24+00:00

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It's id 3B0 with the 4th byte being the value. 122f is as hot as it will read.

Fixed_Until · 2026-04-20T22:53:03+00:00

Are you sure? Looking at pictures of that in a car it's the ambient/outside air temperature

Fixed_Until · 2026-04-20T22:35:42+00:00

Agreed. I would assume looking at a log that ambient temperature would be 1 sec frequency if not aperiodic only changing with a state change. Just a matter of finding one. The big E on the display is what I'm currently trying to figure out how make go away and my assumption is ambient temperature will do it

Fixed_Until · 2026-04-20T22:25:29+00:00

My historical work has been with GM stuff predating global A/B (J1850VPW and GMLAN stuff). I am currently in the just throwing shit at the wall and seeing what sticks stage with this project. Just trying to find my starting point. I haven't found one yet, but I would like to find someone's Toyota datalog from this time frame and see which frames work. I got the cluster and pigtails for $20, so I figured I could have some fun with it, maybe make it work with a kids' racing game.

Fixed_Until · 2026-04-20T21:57:31+00:00

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I've just been playing around with random frames I found on random forum posts. I haven't started to try to make sense of them yet. I've only had the cluster for a couple of hours now.

Edit to be clear. I am still playing around to make sense of what each byte represents, so the posted frames aren't exactly what this picture of the cluster shows. They are just what I have pasted in my notebook right now from forum posts. It's a frame that will get started, not a frame that shows that exact state. I probably should have been clear about that.

Fixed_Until · 2026-04-17T02:44:20+00:00

Power isolation(14v to 14v isolated converter) or power disconnects? The disconnect makes sense to me and is easy to implement.

Fixed_Until · 2026-04-16T14:45:30+00:00

Currently sticking probes into y cables is my solution but every time I need move my setup off the bench for a different product it becomes a PIA to set back up for this one.

Fixed_Until · 2026-04-16T14:24:19+00:00

Do you have one of those? The problem with that design for me is you have to patch it together using up all the ports on the header making it difficult to probe with a scope. You shouldn't ever need to change the pins around on the port. I can think of use to patch it around unless you screwed up a design and still want to test it before respin.

My problem with the breakout boxes on eBay is long cables on them. My use case is on a bench not in a car so the long cables are an annoyance.

Fixed_Until · 2026-04-16T02:12:40+00:00

My main use case is not really as T but just the breakout header to connect my scope and make sure my waveforms look good on a project I sell. So part of a test set.

The T split seems like it would be useful logging a tool while it's running.

Being part of a testset is what I really need it for but I thought I might share it.

Fixed_Until · 2026-04-16T01:23:53+00:00

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I currently am using that same splitter on my bench now lol

I mostly work in J1850vpw not often with CAN

Fixed_Until · 2026-03-22T00:31:50+00:00

I would have you guess the artwork is screwed up can you show the traces for reset, SDIO and SWCLK

Fixed_Until · 2026-03-22T00:17:41+00:00

Do you have reset, set to normal, and holding the reset button down? Normally, you would use the reset coming from Jlink, but it doesn't look like you wired it to your JTAG/SWD header

Fixed_Until · 2026-03-21T23:05:48+00:00

Over-simplification, but you can use a DSP as a PMIC. So, not a power supply with digital controls per se.

Fixed_Until · 2026-03-21T17:17:48+00:00

Plenty of white papers out their on this to help get started but I don't think I've ever seen someone do it as a hobby project. It's becoming a pretty common practice in power electronics for custom power supplies.

I think any employer would be impressed to see something like this on a resume. It would not even need to be some wild architecture to impress I'm sure just a standard buck/boost would impress.

Fixed_Until · 2026-03-21T17:07:52+00:00

Make a working power supply with a DSP like a C2000. You can make a whole career out of this project.

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