I once met a person that never drank water, only soft drinks. It’s not the unhealthiness of this that disturbed me, but the fact they did it without the requisite paperwork.

Unlike those disorganised people I have a formal waiver. I primarily drink steam and crushed glaciers.

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Joined 3 years ago
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Cake day: June 14th, 2023

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  • WaterWaiver@aussie.zonetoRetroGaming@lemmy.worldBuilt to last
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    5 months ago

    Ty. Sorry it was a grumpy warning :(

    From memory, it felt like the electrostatic discharge that used to happen whenever I was touching my car.

    That’s likely a valid comparison. Some parts of the tube might give you the same style of event as static electricity discharge when you touch them. Other parts would give you something more though :D so please don’t take this as a generalisation.

    Interestingly, the PC suffered no damage at all and didn’t blow its internal fuse, either.

    Fuses are OK as fire prevention devices, but mostly useless as electrocution prevention. They blow based off power draw and time. Many human-electric interactions don’t actually draw that much power or last that long when compared to normal circuit power draws & timescales.


  • WaterWaiver@aussie.zonetoRetroGaming@lemmy.worldBuilt to last
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    5 months ago

    Thankfully, it must have been all volts and no amps so I was OK, even though I let out quite the yelp. 😁

    Complete myth. Please don’t repeat this. It’s not even remotely close to a generalisation, it’s completely wrong and dangerous.

    (Sorry, pet peeve of mine. Have had family members happy to play with mains wires but terrified to touch car batteries for fear of death)

    100mA through someone can be harmless. 1mA through someone can be fatal. Lethal conditions occur under certain complex circumstances involving not just voltage/current, but frequency, exact waveforms, duration, contact points and the individual’s physical parameters (human skin resistance varies a LOT, it’s not an insignificant factor).

    The most commonly encountered electrical hazards involve 50/60Hz 120/230V mains and hand/foot dermal contacts. This is a lethal combination that can cause heart fibrillation. Even 5mA or 100VAC can cause this (sometimes you will see lower numbers cited, “it depends”). Death can occur a day later, see immediate medical attention if you believe you have been shocked by mains wiring.

    At very high frequencies our nervous system is not sensitive, so we can pass larger amounts of current or deal with higher voltages without much harm. I’ll still hedge this with “it depends”, you can get thermal burns (which if on the eyes includes blindness) and pathways through the body vary with contact points, changing the risks.

    Static electricity discharges can be crazily high voltages and currents (many amps, sometimes hundreds of amps). Yet they are not a hazard.

    The high voltages in your CRT will supply very high currents when applied to dermal contact points on the human body. This will likely induce involuntary muscle contraction. Prolonged contact could cause burns and unwanted chemical reactions to occur internally, but is unlikely to cause heart fibrillation because of the non-repeating DC nature.


  • WaterWaiver@aussie.zonetoRetroGaming@lemmy.worldBuilt to last
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    5 months ago

    I was young and did not have access to soldering irons. So I bridged the two pins with aluminium foil and sticky tape.

    It would slowly peel off and my controller would suddenly stop working mid game. I couldn’t reboot the console because I couldn’t save (no VMUs). So I’d fix it live – I’d leave the screws out of the case, jiggle my fingers in there and fix it.

    This was fine, worked for most of a year. Until I killed the console by accidentally touching the controller PCB to another PCB whilst doing this fix. I still have the corpse somewhere, to this day I still feel awful about it.










  • I was amazed that we transitioned from one GPU heavy bubble (Crypto) to another (LLM/AI). Whilst the hype for crypto imploded the use for the hardware sort of didn’t. I wonder if the next bubble with be the same, or if we get some refreshing variety to our money sinks?

    Microsoft et al are subsidizing GenAI to an insane degree. […] prices shoot up for their customers and serve as a rough awakening to all the websites that integrated a crappy chatbot.

    I’ve run some much simpler chatbots on just my desktop PC, so they will have some fallback (if they really choose to take it). Still it locks up my entire computer for a few second for each reply, so even a few hundred users per second peak would be an expensive service.

    (Insert joke here about customers not noticing or caring about the difference between website chatbots built on big company services vs smaller ones, because they have exactly the same problems just in different hues.)








  • There have been constant news articles coming out over the past few years claiming the next big thing in supercapacitor and battery technologies. Very few actually turn out to work practically.

    The most exciting things to happen in the last few years (from an average citizen’s perspective) are the wider availability of sodium ion batteries (I believe some power tools ship with them now?), the continued testing of liquid flow batteries (endless trials starting with the claim that they might be more economic) and the reduction in costs of lithium-ion solid state batteries (probably due to the economics of electric car demand).

    FWIW the distinction between capacitors and batteries gets blurred in the supercapacitor realm. Many of the items sold or researched are blends of chemical (“battery”) and electrostatic (“capacitor”) energy storage. The headline of this particular pushes the misconception that these concepts can’t mix.

    My university login no longer works so I can’t get a copy of the paper itself :( But from the abstract it looks first stage, far from getting excited about:

    This precise control over relaxation time holds promise for a wide array of applications and has the potential to accelerate the development of highly efficient energy storage systems.

    “holds promise” and “has the potential” are not miscible with “May Be the Beginning of the End for Batteries”.



  • Oh. Back to resistance: Doesn’t really matter audio quality doesn’t care it’s still the same AC signal just with less amplitude

    Only for ideal resistors.

    Resistors are noise sources. Intentional resistors tend not to be too bad (and probably won’t be heard in this situation unless you have super-high-impedance headphones, perhaps 10’s of K), but unintentional resistors (eg corroded unstable metal contacts inside a plastic part) can be atrocious.

    A few things to add to this:

    (1) If your resistor acts even slightly like a diode then you will encounter partially rectified RF signals (more noise yay). Metal oxides between metals can do this, eg if the connector has crimped two badly-plated bits of metal together.

    (2) Plasticisers in some plastics can leak out, causing corrosion on unseen internal metal parts.

    (Of course linking all of this together is just conjecture, the causes of Moss’ bad adaptors might be something completely different)