Repost from BLF to share these future flashlight designs. There isn’t too much content like this out there that I’m aware of but it’s fascinating to me.

Bonus 90mm TIR:

https://programming.dev/post/3666732

Change log for upcoming Lemmy version 0.19.0 I am just reposting this from the original post: https://lemmy.ml/post/5711722.

It’s interesting to see this for the software we’re all using and it makes me want to learn a bit more about the architecture. Quite a few user-facing features and some backend improvements. For example:

Outgoing Federation Queue The federation queue has been rewritten to be much more performant and reliable. This is irrelevant for client developers, but admins should look out for potential federation problems. If you run multiple Lemmy backends for horizontal scaling, be sure to read the updated documentation and set the new configuration parameters. The Troubleshooting section has information about how to find out the state of the federation queues.

https://github.com/LemmyNet/lemmy/pull/3605

Who’s getting one?

Interesting post from the designer of the ts10 (I think) about potential new body styles of the next-generation ts25.

Bonus comment with good news

Wurkkos Terry: Got it my man. I can feel that the higher and higher voice of regulated driver. We are constantly increasing the regulated models.

cross-posted from: https://programming.dev/post/2656516

What are your real-world applications of this versatile data structure?

They are useful for optimization in databases like sqlite and query engines like apache spark. Application developers can use them as concise representations of user data for filtering previously seen items.

The linked site gives a short introduction to bloom filters along with some links to further reading:

A Bloom filter is a data structure designed to tell you, rapidly and memory-efficiently, whether an element is present in a set. The price paid for this efficiency is that a Bloom filter is a probabilistic data structure: it tells us that the element either definitely is not in the set or may be in the set.

What are your real-world applications of this versatile data structure?

They are useful for optimization in databases like sqlite and query engines like apache spark. Application developers can use them as concise representations of user data for filtering previously seen items.

The linked site gives a short introduction to bloom filters along with some links to further reading:

A Bloom filter is a data structure designed to tell you, rapidly and memory-efficiently, whether an element is present in a set. The price paid for this efficiency is that a Bloom filter is a probabilistic data structure: it tells us that the element either definitely is not in the set or may be in the set.

Updated link from https://zeroair.org/2023/08/28/convoy-m21h-flashlight-review/ to https://darrenyeo.com/convoy-m21h-xhp70-3-hi-flashlight-review-best-budget-pocket-rocket/ since the former had some pretty aggressive ads (the new link has some but they were only at the top).

Convoy is a personal favorite brand for single-cell mechanical switch lights. I’ve been comparing an s2+ with 18350 vs T3 with 14500, and T3 is my preference as a daily light.

So why is the T3 so great? It’s large for a 14500 but also durable and it has an elongated shape (21mm x 97mm) more similar to larger lights than the short s2+ (24mm x 84mm). Just like the s2+, it’s semi-custom in that the customer can choose from a few LEDs and in the case of the popular 519a choose a color temp from 2700k-5700k. Plus Convoy now offers these lights with MAO or in copper (coated for the T3) or titanium (linked) for more consumer choice direct from the factory.

The biggest downside of the T3 and the reason I keep trying to like short s2+ is the T3 driver. With a limit of 1.5 amps with a 14500, this is only 30% as powerful as the standard s2+ 5 amp driver. That’s still very useable with a 519a, but if it were bumped up to about 2.5 amps I think it would be even better. The driver itself has great reviews and regulates the output such that brightness does not immediately decrease with voltage. And for the DIY-capable, the driver is the same size as s2+’s so it has the potential to be just as powerful.

So far I have aluminum T3s in sst-20 deep red and 519a 3000k plus a broken 219b 3500k. Did I mention these start at $15??

Anyone else using Hollow (written by Netflix) in production?

Hollow is a java library and toolset for disseminating in-memory datasets from a single producer to many consumers for high performance read-only access.

This novella fits well under the larger umbrella of speculative fiction I think. It feels like magical realism with a touch of science fiction and having fairy tale elements.

I also enjoyed Noor and I plan to check out the author’s Binti trilogy.

Would recommend checking one of these out for something a little bit different!

Edited: previously linked to https://www.sofirnlight.com/products/sofirn-if30-edc-powerful-flashlight?spm=..collection_eea4d417-4338-4a86-ba3e-1a41b66cb32b.collection_detail_1.1, replaced with an image for better Lemmy preview.

Something new from Sofirn. These larger cells (than 26800) seem to be popping up in flashlights more often now. This one lists 6500 mAh which isn't a much bigger capacity but presumably the maximum discharge must be pretty high to support 12000 lumens.

Sft-40 in the center surrounded by flood emitters. This isn’t one I’ll be picking up, maybe I’ll hold out for a 461000 cell!

Throwing Rocks: Without spoiling the plot, what are some good books that involve the threat of weaponizing a planet’s gravity well against its population?

Please if possible don’t specify whether the event actually happens in the book to keep it a mystery.

cross-posted from: https://literature.cafe/post/270743 ![email protected]

I have been reading the English translations and the characters and especially their dialogues feel very fake. I do appreciate the hard science aspect of the books but the long monologues, kids speaking like middle-aged philosophers, and army personnel being one-dimensional macho men breaks the immersion for me. It has the depth of a 1980s low-budget thriller.

I don’t read a lot of hard science fiction or translations of Chinese books. I don’t know if this is genre-related.

This article helped defined the “data engineer” role so I’d say it belongs here!

Although some time has passed, I find it very relevant: SQL is used more than ever, graphical ETL tools that don’t output code are rare and vendors are still trying to convince executives to trust all their data to proprietary data warehouses.

The author Maxime Beauchemin also wrote Airflow and Superset so they have some experience worth listening to.

There are some great posts by experienced modders here. I’m not one, but I want to start making simple modifications beyond swapping reflectors. For example, swapping out a 5a linear driver for a 5a buck in a Convoy S6.

For a simple job like unsoldering two wires then soldering them, is there a small usb or battery-powered iron that would do the job without spending too much on the initial investment?

Any input is appreciated!

A few small lights I had around. The hs10 gets a lot of use as a night light and the ts10 is carried the most right now. Never really used the s21d in this form but it’s very compact!

Left-to-right:

Sofirn hs10 16340 2700k

Wurkkos ts10 14500 5700k

Sofirn sc21 16340 4000k

Acebeam Pokelit AA/14500 5000k

Sofirn sp10 pro AA/14500

Convoy s21d 18350 2700k (with Wurkkos 20350 tube and tail cap)

Three Convoy lights with 8A buck drivers for getting the most runtime out of 21700 size batteries. Purchased for $28-$38 each with batteries included I think these are an incredible value.

*white balance is not consistent

M21B with SFT40:

S21D with four 519A 2700k emitters and 60 degree beaded TIR:

S21B with Osram CULPM1:

What other sites ought to be included (if any!)?

Tools

• Parametrek Flashlight Search: A supercharged flashlight database. “Start with an expansive catalog and provide parameters that you are looking for (or are avoiding)”

• LumiReviews.ca Flashlight Review Database

• CamelCamelCamel Amazon price tracker

• Andúril Diagrams

Buying Guides

• Arbitrary List of Popular Lights

• Grizzly’s Convoy Guide

Discussion

• Budget Light Forum: Established English-language forum. “Where Frugal meets with Flashlight!”

Two new SBT90.2 lights from Convoy

3x21D: 28 amps, 90.5mm head diameter

L21B: 18 amps, 62.6mm head diameter