Sara M

YouTube video by Sara M Lorenz attractor on Analog Discovery 2

www.youtube.com/watch?v=7u8S...

YouTube video by Sara M the life and death of chaos (lorenz attractor)

www.youtube.com/watch?v=FR4e...

almost symmetry!

the joke was that the box looked kind of like a jewelry box, the more i read it the worse it gets 😬i'll see myself out!

if anyone ever wants to marry me, they better propose in style.

I decided to upgrade my quickly cobbled together dual supply from last year. I hope this turns out well.

bsky.app/profile/anth...

curious indeed!

finally unlocked the power of multiplication!

about the hobbyist bit, yeah! i just picked the first result in the package i wanted, and this will still do what i need it to, just a curious thing that two versions exist

looking further down in the datasheet i found that the thicker tab one is called "dual gauge" and has a tab that's ~1.23mm thick. I just chose the first LM317 result i found for the TO-220 package without realising there were two versions. this is the only information on thermal specs

yeah! i got this after my order. no mentions of the thinning of the linear regulators, so that probably is a much older change

so linear regulators have become thinner! I thought only the fake ones had tabs this thin! for a moment i thought mouser had started shipping fake parts, but then i looked in the datasheet and, well, they did get thinner indeed! ~0.5mm specified in the datasheet. i wonder when this happened, hmm!

I forgot to consider the MOV's capacitance, which measured 2.5nF. at 60 Hz that's ~1.05MΩ and that accounts for the 108µA I measured! ._.

the extremely old varistor with one of the parallel capacitor's terminals de-soldered and standing on the newly acquired third leg

i then connected the extremely old varistor after removing the parallel capacitor, and the current through it was about 50µA. 108µA leakage for the new varistors doesn't feel right. Any thoughts on this?

B72220Q0151K101 connected to mains 120VAC in series with a multimeter in microamps mode, another multimeter is measuring the voltage across the varistor/multimeter series. 108.3µA and 120.4V

i/v curve of the varistors in the "EnergetiQ" series, specificallt the SIOV-Q20 ones, which is the series my varistors are from.

almost 40 year old varistor! in parallel with a capacitor.

So, I found an old power strip my dad had in storage. It had MOVs from the 80s in it. I wanted to replace them, so I got new ones from farnell. I got these: B72220Q0151K101. the datasheet shows this curve for ileak. i'm getting 108µA at 120V. have i gotten duds? i've tested 3, am i testing it wrong?

at least it had personality, not made by the lifeless corporate cookie cutter template that spat out the new one 💀

the tantacrul guy was like "this fits so well with our other logos" and yeah, but, those logos are so bland, generic and lifeless they are the barnum statements of logos, the more generic they are, the easier the mental gymnastics you need to do to be like "oh yeah, this totally fits this product"

a strange amazon listing showing a fluke 101 multimeter with the listing title "Pranarom - Aromaforce Oregano Mini-Caps - Certified Organic Ingredients for Natural Health - Supports respiratory wellness, easy to swallow

instead of a fluke 101 multimeter, you can get pranarom - aromaforce oregano mini-caps. basically the same thing. they are easy to swallow!

i've had a smoother experience on wayland for things like games and video playback, but i'm also annoyed at its lack of consistency, like for a display server built with multi-monitor support to not remember where windows were, it's just silly

140.3.0esr is also behaving the same way. switching to X11 seemingly "fixed" it, even when i went back to wayland, it worked fine for a while, but the problem is back. this feels more like dealing with a whimsical creature than with a deterministic machine

firefox 143, the snap, the deb and the tarball all showing this behaviour

link to the firefox forum where i ask the question and provide more details: support.mozilla.org/en-US/questi...

perhaps @jimsgarage.co.uk might know what's going on? sorry to ping you directly for this. the firefox forum has tried to be helpful but has not been successful yet :(

YouTube video by Sara M Firefox unselectable ghostly tabs on Ubuntu+KDE+Wayland

any firefox/linux wizard around? since a few days ago, when trying to drag tabs out of the main window to put them elsewhere, they become ghostly and unselectable. initially this happened when i had something else in full screen, but now it happens under any condition www.youtube.com/watch?v=dHm-...

ooo, cool, what does that do?

an amazon listing for a grounding plug that came up while searching for an adapter to connect an ESD wrist strap to mains earth. it's titled "grounding plug: safety adapter - ground socket splitter for multiple earthing producs - works with type B outlet for earth connected mats, sheets, wristbands, pillowcases" and the brand name is "merisky" which is printed on the adapter and prominently displayed in the photo.

merisky, for when you want to be ESD safe, but not too safe

a screenshot of an amazon listing for lead free solder showing a spool of solder and under it it reads: 4 oz. Lead Free Solder (95% Tin / 5% Lead)

lead free solder, you pay for the tin, the lead is free!

huh! i didn't expect to see an FPGA in a mid range AV receiver (yamaha rxv4a)

oh wow, that's not ripple, at 5V that's a tsunami! haha

does anyone off the top of their head know how to calculate filter caps for a linear power supply to get a specific ripple voltage?

i needed this today and learned that i had already forgotten how to do it and had to google it. i'm curious if anyone keeps it in their mind

a light colored plastic enclosure, with a moderately sloped front panel, in this case hosting a cheap hyelec power supply

does anyone know what's the name for this type of enclosure and where to find them? i've been looking for a sloped box for a project, but no luck, they all have a very long sloped face, but i want something like this thing. thank you!