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Joined 1 year ago
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Cake day: July 11th, 2023

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  • 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.


  • A cable coil will lay flat and neat, and stay orderly indefinitely if two conditions are met:

    1. The coil radius is sufficiently large such that there is little to no tendency to unwind.

    2. There is no twist running the length of the cable.

    The solution to 1 is simple: just create loops large enough that no energy is stored in the “big spring”.

    The solution to 2 is any wrap method which avoids a systematic twist along the cable. If you were an ant walking along the cable, you should find that if you start on the outside surface of the coil, you remain on the outside as you walk the loops.

    One method for coiling cables that achieves both goals:

    Hold one end of the cable fixed in your off-hand. Let the length of the cable loosely hang such that it may freely rotate. With your dominant hand, slide it down the cable measuring a length which will create a loop large enough that the bend radius doesn’t want to spring back open. Here comes the big trick. As you bring your main hand around to create the loop, use your fingertips and thumb to roll the cable in the direction which eases the twist along the cable. Finish the loop, and repeat until done. The coil should lay flat on a table without wanting to unspool wider, or spring up and launch loops into the air (problem and solution 1 and 2 respectively.)

    Practice the finger tip movement. It’s like tying shoes or whistling. Once you get it, you get it.



  • I don’t think Logitech has been a contender for years now. At least for their desktop peripherals. I used to be a fanboy, but had three mice all fail the same way within a year (middle click failed), then my new, expensive keyboard I bought for the office started dropping many keys under my left hand. And I work from home, so the keyboard only had a few dozen hours of actual use on it.

    It feels like there are so few options for peripherals that have the features I want, but don’t have gaudy LED light effects or an otherwise silly “gamer” aesthetic.