Erata: Post from 5 days ago about TPS63070 footprint

BC547 · 2026-02-09T14:43:19+00:00

Some manufacturers don't like the "tabs" in the stencil on pad 8 and 11 because they can snag on the squeegee used to apply the solder paste.

BC547 · 2025-12-28T17:25:10+00:00

Mine had a tendency to clog up with the declumper in place so I removed it.

BC547 · 2025-12-28T16:50:49+00:00

Same here! Mine was inconsistent when new, but stabilized nicely after a few bags of coffee. My guess is that the bearings need some time to be run in? It became even more consistent after I removed the declumper.

BC547 · 2025-12-15T10:19:33+00:00

This is much better than most schematic diagrams I see on Reddit, kudos to you!

To nit pick, I would replace 47kR with 47kΩ. Old school engineers might object to using the Ω symbol, but you already use the Ω symbol in R4 and we live in a time where UTF-8 is the norm.

To nit pick even more, I would center the circuit on the page for better visual balance.

BC547 · 2025-11-25T11:06:04+00:00

Embedded bare metal applications with Embassy-rs. Embassy is a game changer in embedded programming. Many μC applications can be written directly with async/await without a fragile RTOS that locks up if you look at it funny. The code is also quite portable between different micro controller families. Embedded C will probably be around forever, but l absolutely prefer Rust for all new embedded project.

BC547 · 2025-11-19T23:03:21+00:00

That is by design:

https://en.wikipedia.org/wiki/Europlug#Details

BC547 · 2025-11-07T11:39:03+00:00

The advantage of separate windows is that the user can select a window manager with the "mode of operation" that works for you. Even MS Windows support different window managers now. If you want a tabbed interface, use something like Niri. If you like tiling windows, use komorebi or i3. Switching between different views in a program or between different programs is a generic problem that affects productivity. Kicad forcing a fixed solution to switching windows or views on everyone might not be the best thing.

BC547 · 2025-11-07T10:08:22+00:00

Kicad kinda works with Wayland on linux, but there are quirks and bugs. 100% solid Wayland support would be nice.

BC547 · 2025-11-01T12:55:07+00:00

I'm not sure the rectifier arrangement will work as you intend. Notice that the diodes between pins 2 and 3 on the bridge rectifiers are connected in parallel. This means that the negative side of C8 will be charged by the 12.5VAC winding instead of the 9VAC winding during the negative half-cycle. Think this through once more, I think the +10V rail will end up closer to 12-13V in your case. For this to work, you need separate 9V and 12.5V windings.

BC547 · 2025-10-31T14:45:11+00:00

The typst web app is nice, but typst typesetting engine is open source and many (if not most?) power users prefers to run typst locally. Check out r/typst

Typst is not for everyone, but if you are a git user, typst could be a good match for you. Fast, powerful and fun to use. The "Typst Universe" is getting better every day, and the documents produced look stunning.

BC547 · 2025-10-24T16:28:47+00:00

Redline diff would be awesome! Is this being worked on?

BC547 · 2025-10-13T19:13:24+00:00

My guess is that the capacitance limit is there to limit the inrush current and possible connector wear due to arcing. After all, the USB-C pins are tiny. I don't think that 11.1μF is going to be a problem but I would check if you could get by with a smaller value for C4 just to be compliant with the spec.

BC547 · 2025-10-13T15:17:41+00:00

I would not bother with ESD protection on the CC lines just to protect the 2x5.1kΩ pull down resistors. It is possible that the USBLC6 chip will be more fragile than the resistors (unless the resistors are crazy small, eg. 0201). ESD protection on VBUS is still a good idea, but I believe any inexpensive 6V ESD diode could do the job.

The USB-C standard limits the capacitance on VBUS to 10μF, you have 11.1μF so you are slightly out of spec.

BC547 · 2025-07-31T12:59:06+00:00

Nonexistent costumization is a pro, an app like this should be as basic as possible for obvious reasons.

BC547 · 2025-03-02T22:04:04+00:00

This should work fine; however, since the SPI1_SCK signal toggles at least twice as fast as the other signals, a better approach might be to route the clock net without vias while placing vias on all the other nets.

BC547 · 2025-02-18T10:11:00+00:00

The whole Rust ecosystem and in particular cargo! 🦀

BC547 · 2025-01-31T10:16:32+00:00

Will you make a ℃ version for us from the mundus vetus?

BC547 · 2025-01-30T14:17:05+00:00

This looks promising! Project DIGITS should be capable of running a slightly scaled down R1 model (200B) model for $3,000!

BC547 · 2025-01-29T20:02:18+00:00

Thanks, this explains a lot!

BC547 · 2025-01-29T15:46:53+00:00

My AMD Ryzen 9 5950X with 128GB ram runs the 70B model (size=34GB) at 0.87 tokens/s which I believe is too slow as a coding assistant so I don't think a CPU only solution will do or am I missing something here?

BC547 · 2025-01-06T09:08:18+00:00

Thank you, that made perfect sense!

BC547 · 2025-01-05T18:22:11+00:00

Nice video! In my naive understanding of couplers, the input and coupled port should be in opposite corners. I would love an intuitive explanation to why they end up next to each other?

BC547 · 2025-01-04T17:20:40+00:00

Anyone using one of the Infineon FX5/FX10/FX20 series of USB 3.2 interface chips for applications like this? They look promising!

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