• 0 Posts
  • 27 Comments
Joined 1 year ago
cake
Cake day: July 11th, 2023

help-circle

















  • I have no idea how these work, but one hack idea off the cuff:

    You get the light for free. At least when your lids are open; that’s how vision works. A cheap digital watch lasts ages on a tiny coin cell because the polarisation of the LCD, which passes or blocks polarised light, takes minimal energy. Stack up a passive polariser, and the active LCD-like layer, (and maybe a second passive layer?) and you can cast selective shadows on the retina.

    This gives you monochrome “smart vision” in the same sense as a monochrome Casio wristwatch. No idea how to tackle issues of focus at such a short focal length, or achieving any sort of active display let alone colour.

    Maybe the whole thing is a pipe dream crackpot idea.


  • I have a whole desk full of calculators. The two I use most are:

    Sharp EL-W516X A very capable little dot-matrix device, with some limited programming / macro ability. Performs all of the calculus, stats, matrix, and combinatorics functions I use regularly. This was my go-to calculator until I started using the…

    Casio fx-115ES PLUS At some point, I had to write some exams which only allowed a few calculators off an approved list. This was the one I picked from the list. It is a very competent little device which can do anything the Sharp unit above can. After getting over the novelty of having to learn a new keypad, I found it nearly identical to the Sharp in usage.

    I think that both calculators are effectively identical in terms of function, but the Sharp may have a slight advantage in terms of its interface. I would wager it takes slightly fewer keystrokes for the same operation on average as compared to the Casio. I also didn’t really take advantage of the programmable aspect, instead using the four keys for the common multipliers I use in my work: kilo, milli, micro, nano. I liked how the display would read in “natural” terms like “2 * pi * 10k * 100μ” instead of having a tonne of “10^n” terms in the line.

    The Casio has the advantage that it is typically on just about any approved calculator list; if you’re taking exams down the line, consider getting used to an approved calculator now so you’re not wasting time searching for buttons later. It’s also the more popular choice, I think. I saw plenty of students, TAs, and instructors using this calculator which could make it easier to give and receive help on it.


  • One of the frustrating things about Signal is its extreme compression. I hope WhatsApp laxing up a bit will be the final push to the Signal devs to allow me to send a 30 MiB photo if I want to. Just give me a damn opt-in option buried in a settings menu for Pete’s sake.

    Annoys me to no end that I’m forced to crunch image quality down. The reasons I heard in discussion were to save disk space and network bandwidth. I have no sympathy for either of these points. Have a modicum of digital hygiene and delete old files, and pressure your ridiculous governments to invest and regulate ISPs, then join the rest of the world in the 21st century.