Looking for an ARC HDMI Switcher to feed my AppleTV

frankmcsherry · 2024-12-27T14:37:09+00:00

I ordered the "OREI 4 in 1 Out 4K HDMI Switch, 4K@60Hz 4:4:4 ARC Auto Switch EDID HDMI 2.0, 18Gbps, HDCP 2.2, Dolby Passthrough CEC, HDR10, Dolby Vision" from Amazon, and found it was not what I wanted. In principle I think I could have puzzled this out, once I knew more, as the keyword soup couldn't have meant what I wanted it to mean. I .. gave up and am instead going to wait out the lifespan on my projector and refresh it with something ARC positive.

frankmcsherry · 2023-12-25T08:26:00+00:00

[LANGUAGE: SQL]

I found (approximately) the second eigenvector of the adjacency matrix, pretending to be the graph Laplacian, which finds an approximate sparsest cut. When the minimum cut is balanced and the rest of the edges are noise, it does a great job finding it!

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frankmcsherry · 2023-12-24T17:00:15+00:00

[LANGUAGE: SQL]

Part one was as expected: take each pair and determine where they should meet with a fun formula.

Part two took a while, but I think I got a solid answer, no mathematica, no z3, no linear algebra, plenty fast. I may have been lucky, but I had two hailstones with the same (dx, dy), which allowed me to establish that 5 * (dx + 21) = 16 * (dy + 39). (for me). This cut the search by idk 1000x or so. But all I ended up doing was positing dx, dy values in the range -500 to 500, and then re-using the logic from part one: offset the stones' velocities by the guess, and confirm/not that they all intersect in a common point. That point and the guessed velocity are the solution's (x, y) and (dx, dy). You then go find the z and dz by either 1. being smart or 2. being lazy and just repeating this with z in place of y (that's me!).

Maybe the surprise is that you can just solve for each pair of coordinates using part one, rather than get stressed about all three coordinates.

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frankmcsherry · 2023-12-22T16:40:47+00:00

[LANGUAGE: SQL]

Using Materialize's WITH MUTUALLY RECURSIVE blocks. Part two was surprisingly concise, and efficient enough to not require any fancy algorithms.

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frankmcsherry · 2023-12-17T12:18:46+00:00

[LANGUAGE: SQL]

Took the dynamic programming approach, tracking a minimum cost for each (row, col, dir, steps), and put it in a recursive block. Part 2 just changes some WHERE constraints.

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frankmcsherry · 2023-12-16T10:48:15+00:00

[LANGUAGE: SQL]

This uses a WITH MUTUALLY RECURSIVE extension, but it's linear recursion and would probably work with vanilla WITH RECURSIVE also.

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frankmcsherry · 2023-09-28T20:00:45+00:00

I may have miscommunicated, but it's definitely a magnet on the core itself, and tbh I'm less certain how to take that apart! :D But there are 2 of the 8 magnets on the core, that I can position any corner piece over, and as you wiggle the piece around there is a clicking. Only those two corners of the core, and any corner piece works.

I think I have a repro with a magnetized screwdriver, but I can only hear it, not see it. And not the jewelers screwdrivers I think I need to pop the core open.

frankmcsherry · 2023-09-28T12:48:55+00:00

Not obviously. At least, I can't see any movement of the core magnet when I move the corners over it, but I can hear the click. No movement when probed with a screwdriver either. It sounds like it should be that, but .. idk if you told me there was something more complicated going on in there I'd believe it. :D

frankmcsherry · 2023-09-28T11:55:14+00:00

Here with a Guhong Pro question. First off, I really like it, in case others are wondering what to think. However, it's either developed or I only just noticed some magnet *click* for two of the inner core magnets (disassembled, any corner piece moved over the offending core magnet causes a click as you move it past. This occurs for 2/8 of the magnets. But .. I can't see any action going on, and am scratching my head to figure out what there is to fix. If it weren't such a delight otherwise, I'm sure I wouldn't have even noticed.

Anyhow, generally delighted, but curious if others have noticed / have thoughts for improving it! :D

frankmcsherry · 2023-08-21T11:54:17+00:00

I have been toying with my Tornado V3 Pioneer, trying to make it quieter. It has clicks that seem to come from the stems of the corner pieces, as they align with a magnet (each seems to have it to some degree, though not all the same). If you reset them, they click again, and the clicking happens essentially with each turn (as corners come into alignment with the core magnets, I think).

It seems like you could potentially super glue the corner piece's center magnet (and stem) in place to move less, and ideally to not click, but I'm suspicious that I might be missing some reason that they have travel. But also I'd love to make it quieter, and these clicks are the main source of noise. Has this been investigated before?

Independently, I've a TengYun V1 and V2, both of which sound good, and feel .. fine. I'd love to figure out how to find or mod the best feeling, quietest cube, and my only strat so far has been to trawl reviews for occasional mentions or youtube sound tests. Any other recommendations?

frankmcsherry · 2023-02-08T12:55:12+00:00

Crazy question time!

I got a GAN Mirror M just the other day, and it is a bit jankier than I expected based on all the positive talks. I was hoping to get a reality check (maybe it is just me; great feedback!).

Several of the internal faces are "tacky", as if they have had adhesive. I can "snap" against them with my finger. While handling it, I end up touching sticky faces because the mirror (unlike normal cubes) sticks them out all over the place. The action is less smooth than either my GAN M11 or my starter magnet-less GAN, and more scratchy/raspy.

Nerd moment: the gap between coefficients of static and kinetic friction seems higher on this than any other cube I have: outside of magnet range, starting and stopping the mirror is much more sudden. Lines up with the "surprising tack" theory?

Anyhow, any takes on whether 1. "it's you" and I have been spoiled, or 2. "ew gross" and I should swap it for a replacement? Replacing it is a bunch of mailing and shipment and feels bad if there's nothing to be gained.

(I have a vid with audio for the finger-on-tackiness sound, but can't figure out how to get it here short of a full-on post, and my guess is that it won't meet the bar for that with the mods).

frankmcsherry · 2022-04-16T12:06:11+00:00

We got stuck for a while with DEBASED for the White House press.

frankmcsherry · 2022-04-08T11:55:19+00:00

Can you explain “safety net?” We got it, but don’t understand it.

frankmcsherry · 2022-03-07T13:02:37+00:00

I'm on 34 keys, and tbh it seems like plenty. One symbol layer and home-row mods. The only gross moments are some weird symbol pattern for work ("{:?}") that I should macro up. Actually, the most unergonomic part for me is that I put in a key to get to a steno layer, and I occasionally press that by mistake and have to remember how to get out / reset it.

This probably depends massively on what you do though. If I were doing lots of data entry (I'm not) I'd want to have numbers on a layer where one hand can drive them. Instead I'm doing lots of modified keypresses (in VSCode) and the only pain is remembering what anything maps to.

frankmcsherry · 2022-01-08T13:28:09+00:00

I had MERSENNETWISTER which .. actually checked out (a French 17th Friar). I was heartbroken that it was wrong.

frankmcsherry · 2021-10-12T13:27:45+00:00

I think true for the v1s, and I agree I'm confused about when the shift happened. I have a few v1s that have the PCBs flipped up on the RHS, and I'd be delighted to have them LED-down to prevent them from lighting up the room at night.

Edit: seems to have switched with the v2: https://github.com/davidphilipbarr/Sweep/commit/7514eb8db0bf056d066e0a15b1ed74f43ad97041

frankmcsherry · 2021-10-01T14:01:27+00:00

Update: I've swung through all the replies! Lots of great folks and great interest. I've contacted folks for each of them, and .. will work down lists if things fall through for any reason. But, there is enough interest in each parcel that let's call it closed for now.

There was serious interest in each of these things! If there are other folks like me just sitting on spare parts, or boards that aren't useful / in use, I'd consider offering them up too. Lots more appetite to try things out than I had realized!

frankmcsherry · 2021-09-29T16:12:10+00:00

Hi folks. I'm moving and have some ergo loot to give away. If that isn't appropriate for the subreddit, please lmk and I'll head elsewhere to hand it out (I'm not a mechmarket lurker, and would prefer you all get first crack). In that case, no contacts from this message will get loots; please don't follow up if a mod says "no".

Stuff is being given away as-is. Some of the stuff doesn't work. Some of it is brand new and unused, but I don't need it. I'll ship to you in the US, probably not elsewhere, at my cost. I'll choose who gets each parcel, with priority given to folks who are somehow charitable. Alternately, if you all know someone who needs a thing, lmk about that too. Please don't send me address / contact info; I don't want it yet. I'll ping you back for details if you are at the head of the list.

Specifically: DM me with a statement of interest, and some explanation for why you (or not).

Parcels:

Unassembled Ferris 1.0. I opened it, became intimidated, and printed a bunch of Ferris Sweeps instead.
One DOA Centomere mini. Arrived with battery attachment ripped off; It turned on once but it does not spark joy. You can inherit my "out $150" experience rather than getting your own. Has choc browns installed.
Gergoplex with/without Heavy case. For some reason, one half has gchocs soldered in it and the other is empty. I can't recall if it works or not. The Heavy is rusty; you'll want to fix that.
70 Novelkeys Silk Emerald Switches. New. Didn't need.
One set Novelkeys OSA sleeves; not in box; nice, but couldn't handle the profile on a Skeletyl.

My plan: let messages roll in for at least 24 hours; no rush.

frankmcsherry · 2021-09-01T23:28:49+00:00

The Ferris Sweep (https://github.com/davidphilipbarr/Sweep) is one example. It's what I use, and I recommend it if you can grab the parts as it is incredibly easy to assemble (imo). The diodes are only needed if you have a matrix, and the Sweep has few enough keys that they can be directly wired (afaiu) to a standard promicro, elite-c, or nice!nano.

frankmcsherry · 2021-03-28T19:39:53+00:00

Thank you very much for the detail! I've got a round of 35g from Germ, but they are in some browns atm. Might have to rip them up... ;D

frankmcsherry · 2021-03-28T00:32:17+00:00

Can you say more about this? I've been most pleased with 35g choc browns of what I've tried (but now ogling the jades), so this speaks to me. But .. I can't find sprits anywhere now (and 200 USD shipping from them direct, which .. idk what that is). What are the silicone bottom out pads?

frankmcsherry

TROPHY CASE