> I also removed the background color so we save ink on actual printing.

It seems reasonable to also remove the #post-title border-top:1rem solid var(--accent-dark) for the same reason? That and the padding-top on the same element struck me as unnecessarily moving the printed content down the page.

The primary value discussed in the talk was electrical isolation since there's mains voltage in the appliance and the potential for shorts or inadequate isolation would require some kind of isolation, so a path that optically isolates the communication makes quite a bit of sense.

I'm also curious if other devices have gone this route.

1. Hold a button while booting (pretty normal)

2. This reconfigures the circuit path of one of the LEDs so it is reverse-biased to VCC via its resistor and switches one of the microcontroller GPIOs to ADC input

3. You go to a website that plays a strobe pattern (encoding the firmware)

4. You hold that website in front of the LED till other LEDs blink, signifying a successful update

They could have done this using a photodiode, but no, they had to abuse an LED. Not many people are aware that LEDs can in a certain configuration be used to measure light.

[1] https://github.com/kabelincho/LG-Smart-Diagnostics-modem

All the same diagnostics you can do at the machine, the phone home service allowed a remote engineer to diagnose as well. Things like drum rpm, tilt/knock sensors, uneven balance detection. Instead of paying a human $250 to come out and press buttons, they can do it remotely.

I understand in the pessimistic age of John Deere, all remote diagnostics are bad, but that is not the case here. I was able to do all of the diagnosis myself to determine it was a bad stator and then replace it myself.

Decoding it without help would be difficult for the average consumer, but it's not an impossible task.

Do you mean by mimicking the noises themselves?

https://en.wikipedia.org/wiki/Blue_box

https://en.wikipedia.org/wiki/IEC_62056

We have a Miele washing machine and a Miele dryer. Solid machines all around even after years of use.

The usual solution here is an optical coupling of some kind - optocouplers (a box with a LED, photodiode, and air gap between them) are very common for this purpose, and are an inexpensive and effective option for digital signaling across an isolation boundary.

In this case they’ve basically built a custom optocoupler out of discrete components, which is a bit unusual, but makes sense when you consider the risk of corrosion due to water ingress at the diagnostic ports, and the need to access it while - for example - a dishwasher cycle is running.

https://www.youtube.com/watch?v=ao2Jfm35XeE

https://oldcompcz.github.io/jgs/joan_stark/xmas.html#treewit...

And of course, the BBS Documentary: Artscene episode:

https://www.youtube.com/watch?v=oQrBbm5ZMlo&list=PL7nj3G6Jpv...

Merry Christmas and happy new years everyone!

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https://news.ycombinator.com/formatdoc says:

> Text after a blank line that is indented by two or more spaces is reproduced verbatim. (This is intended for code.)

I assume that's how the top level comment posted the tree which is in a <pre><code> structure.

I kinda do want to go back to oldschool bbses, with cool text-mode lightbar interfaces.

https://en.wikipedia.org/wiki/Joan_Stark

I thought it was just a straggler.

Here is kernel dev telling they are against adding NFSv4 ACL implementation. The relevant RichAcls patch never got merged: https://lkml.org/lkml/2016/3/15/52

I see what I misunderstood, even in the presence of an ALLOW entry, a DENY entry would prohibit access. I am familiar with that on the Windows side but haven't really dug into Linux ACLs. The ACCESS CHECK ALGORITHM[1] section of the acl(5) man page was pretty clear, I think.

[1] https://man7.org/linux/man-pages/man5/acl.5.html#ACCESS_CHEC...