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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.


  • 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.






  • 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.