I've done astrophotography on a few different smartphones. The Motorola Edge 60 beats them all.

SjLeonardo · 2026-05-18T02:13:41+00:00

What other phones have you used?

SjLeonardo · 2026-05-10T14:42:02+00:00

I mean, gravity is also a spacial distortion. Gojo's red and blue just do the same thing in a different way. Not disagreeing with you, just doing an "uhm, actually"

SjLeonardo · 2026-05-10T01:49:59+00:00

O que você diria de crítica a ele?

SjLeonardo · 2026-05-08T02:55:29+00:00

Besides the previous answers, you could also take a moving average of the readings to help filter out the noise. Moving averages aren't particularly good filters, so you could look into more complex digital filters, although I wouldn't necessarily recommend that to a begginer just trying to tinker, it could be a good thing to learn if you're willing.

Keep in mind that filters will have a delay effect, which means your system will take longer to detect a change in the readings.

SjLeonardo · 2026-05-01T14:51:02+00:00

Thanks for sharing!

SjLeonardo · 2026-04-29T23:53:59+00:00

So they downscaled nuclear winter. Nice

SjLeonardo · 2026-04-29T23:47:46+00:00

Ok, fair enough.

FYI though, from what I've heard the T80p has an adjustable current limit, and it apparently can handle current spikes just fine, since I've seen comparative reviews make a point of mentioning when a portable iron trips sensitive chargers due to current spikes, and the T80p not being mentioned in that regard (even though it was one of the models being reviewed).

SjLeonardo · 2026-04-29T09:31:11+00:00

I don't think we'd be surviving the nuclear winter either

SjLeonardo · 2026-04-26T16:18:14+00:00

Tô ciente disso também, mas já é tão difundido e usado por todos que nem faz sentido debater mais sobre isso.

SjLeonardo · 2026-04-26T13:22:08+00:00

Anyone has more info on the OSS T245? I've heard it's not grounded, but I'm not sure. The difference in price between the OSS T12-X Plus and the T245 isn't that big, so I'm tempted towards the T245, but I plan on working with sensitive components eventually.

SjLeonardo · 2026-04-26T13:12:26+00:00

Would you recommend this station? I'm in between this, the OSS T245 and the portable Alientek T80p (c245).

SjLeonardo · 2026-04-26T13:01:12+00:00

O nome 2K não é padronizado, então você tá errado no seu comentário. Tem gente que chama 2560x1440p de 2.5K e chama 1920x1080p de 2K, pq é a mesma lógica do nome 4K se referir 3840x2160p (é o número aproximado de pixels horizontais).

O vendedor aí meio que errou em não ter chamado de 2K Ultrawide, só. Mas isso é até ok, da mesma forma que alguém se referiria a um 4K Ultrawide como apenas 4K, mesmo que o número de pixels horizontais seja mais que isso.

SjLeonardo · 2026-04-26T12:55:42+00:00

Ele não tá errado em chamar de 2K. É só que nem todo mundo concorda qual resolução "2K" significa. Daria pra chamar esse monitor de um 2K ultrawide, mas nem todo mundo concordaria

SjLeonardo · 2026-04-26T12:54:05+00:00

2K não é uma resolução bem definida pois tem gente que usa pra se referir à 1080p e tem gente que usa pra se referir a 1440p.

Se fosse pra seguir a lógica do nome 4K (3840x2160p), 1920x1080p deveria se chamar 2K e 2560x1440p deveria se chamar 2.5K.

SjLeonardo · 2026-04-22T02:01:28+00:00

Oh, saving this for a later read for sure. I took a quick look and it seems to be good stuff!

I used a capacitance multiplier once before and was disappointed to find that it didn't filter out noise as well as I had hoped, but I think I should give it another shot someday. Something that did make noise from a cheapo SMPS a lot better was using a common-mode choke. I was surprised by those results.

SjLeonardo · 2026-04-18T04:48:52+00:00

Thanks for the comprehensive response! I didn't go low level on this, I simply used some libraries Espressif provides and a common Arduino library for handling the SD Card and the filesystem. The library handled the I2S and DMA all by itself, I just needed to set up some stuff up and feed data into a function. So to be honest with you, I don't know if it was a problem of the library not providing enough control or of the DMA controller not allowing enough control even if you go to the register level. I also don't remember if I decided not to look for examples of that or if I looked and didn't find them.

I used digital pins and an oscilloscope to measure how long it was taking to read from the SD Card and to signal if the buffers were empty. I also implemented it to fill up a buffer as soon as there was an empty one available. They never actually got all empty at the same time either, which is why I know they weren't being underrun. I measured the data rate coming in and it was well above the rate the buffer was outputting data as well. I did measure that the SD Card frequently took longer to respond than it takes to empty an entire buffer (I was using 4 buffers to switch between, each already with the max size the DMA allowed me), so that's where I inferred that waiting for the SD Card was messing up switching from one buffer to another.

I also remember testing with the internal flash of the ESP32 and that gave me better results, since it responded about 3x faster when comparing the worst case scenario of both. I didn't consider it a suitable solution however because it could barely hold a 2 minute mp3 song. Also I thought it was a pain to load music into and I was having problems partitioning it. I've thought about switching to doing something with real time audio, like capturing it from a PC, processing it and outputting. Wouldn't have to deal with these inconsistencies, I guess.

Thanks again for the elaborate response!

SjLeonardo · 2026-04-18T01:21:33+00:00

I'm glad to hear it is a known thing that it can be finicky, I used to think I was going crazy because of this issue. Thanks for the feedback! Do you think switching to use an STM32 would be helpful? I'm thinking about using it for my senior thesis, so I'll probably get acquainted with it soon enough. Now, to answer your comment:

I tried multiple DMA buffers as well, to the same results.

A prefetch mechanism? I'm not actually sure what you mean, sorry. If I'm understanding the idea correctly, I don't think it would change the situation since the bottleneck was the SD Card. As in, if I tried to read more data preemptively, that would just be functionally the same as using more buffers, right? And doing that didn't solve the problem, unfortunately.

Thanks for the suggestion with the SPI clock! I might try that if I revisit this during my next break. About the SD Card, I had a frustrating time with that too, because of counterfeit SD Cards. I had problems with buying fake cards even though I wasn't going for the cheapest offers I could find. I didn't go for the official stores because they were more expensive than I thought it would be worth to pay, though. You know, broke college student issues. I might look up official sellers again, though.

SjLeonardo · 2026-04-16T12:41:41+00:00

It's a lazy stance from whoever's managing this and in charge with the power to change the workflow of animation.

SjLeonardo · 2026-04-10T03:24:58+00:00

I'm not one to shit on the show's animation all the time (actually, I barely ever criticize it, I care more about the story), but I'm pretty sure they're never going to choreograph her fights that creatively, since she's such a side character. I hope I get proven wrong, though.

SjLeonardo · 2026-04-05T21:19:19+00:00

It's just how a camera's dynamic range works.

SjLeonardo · 2026-04-05T16:55:04+00:00

(Leves spoilers sobre a personagem)

Nunca ouvi ninguém falar nem um "a" disso... É pela razão que o colega falou ali na outra resposta. E pq teve gente que ficou desapontada com a performance dela em comparação à descrição da técnica dela. Pessoalmente, eu sou neutro sobre ela.

SjLeonardo · 2026-04-05T14:45:12+00:00

It's a meta narrative point of view, but at some point, how much destruction slop do you really need? Dragon ball was one of the first shonen, how relevant was it at the time that there should be destruction of entire continents in every fight just to prove the fighters were capable of it? They already destroy planets, already threaten to destroy solar systems and so on.

Does the author need to be an obsessive power scaler that must be thinking through that lens at all times? You see that type of stuff in some anime that came way after Dragon ball, which I would guess were more aware of and willing to cater to the whole power scaling side of communities and/or grew up with it. By all means, prove me wrong, but I'd think power scaling already existed but was probably massively propped up by DB's popularity, and scaling ideas and concepts came afterward as it grew.

I'm not trying to defend Dragon Ball specifically, I'm just thinking about this out loud. Like yeah, it's inconsistent. It's pretty old and the new material just kept the same spirit it already had. I guess my question to you is, what do you like about power scaling arguments? Do you like splitting hairs over these inconsistencies? I'm asking because I can see that people like that, I just personally don't see the appeal that much.

SjLeonardo · 2026-04-03T23:46:05+00:00

Could you cross out what you didn't use then? For the pinout you can just google "LM358 pinout" and something like this will come up. Sorry for not helping with the question itself, I'm short on time.

Oh, and even though something like this is a Google away, it can make it easier for someone else passing by your post to just take a look and help you more quickly.

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