If it oscillates that fast, it might not feel very different from a normal shower
this post was submitted on 18 Jan 2026
618 points (98.4% liked)
memes
19125 readers
2538 users here now
Community rules
1. Be civil
No trolling, bigotry or other insulting / annoying behaviour
2. No politics
This is non-politics community. For political memes please go to !politicalmemes@lemmy.world
3. No recent reposts
Check for reposts when posting a meme, you can only repost after 1 month
4. No bots
No bots without the express approval of the mods or the admins
5. No Spam/Ads/AI Slop
No advertisements or spam. This is an instance rule and the only way to live. We also consider AI slop to be spam in this community and is subject to removal.
A collection of some classic Lemmy memes for your enjoyment
Sister communities
- !tenforward@lemmy.world : Star Trek memes, chat and shitposts
- !lemmyshitpost@lemmy.world : Lemmy Shitposts, anything and everything goes.
- !linuxmemes@lemmy.world : Linux themed memes
- !comicstrips@lemmy.world : for those who love comic stories.
founded 2 years ago
MODERATORS
This could be better than existing pressure balance based mixing systems, assuming it allows you to adjust the hot vs cold pulse width
Thermostatic is dead. Embrace thermovariable.
I currently need to replace my showers mixing valve. When will this product be available?
Pulse Water Modulation
Unfortunately it is stuck at 10⁻¹⁴M and a gamma producer.
I can make this worse. The Katy Perry song Hot N Cold starts playing full blast every time you turn the shower on.
I can make it better by changing it to Heart and Soul by Huey Lewis and the News. Which does contain the lyric, “She’s hot and cold” but also contains the lyric, “hot lovin’ every night,” and so is infinitely better.
That’s from their album Sports! It has a clear, crisp sound, and a new sheen of consummate professionalism that really gives the songs a big boost.
He’s been compared to Elvis Costello, but I think Huey has a far more bitter, cynical sense of humor.
I never quite got this monologue. I think the idea was that the character was reciting someone else’s review of these musicians, as if it were his own sophisticated take. But in what world is Huey Lewis at all bitter and cynical especially compared to Elvis Costello?
Patrick and his clique are a bunch of superficial morons who have no idea what they're talking about a lot of the time. They blindly follow popular trends, do what everyone else does and say what everyone else says. They have no personal opinions and are too shallow to form any. Guy probably sat down and wrote that "analysis" by imitating other people's reviews of other media, and then memorized it to recite at people. The discussion they have at that dinner is like that too. They're just regurgitating rehearsed and memorized statements about some social issues they clearly know nothing about and don't care at all.
load more comments
(1 replies)
Is that the scene where Batman kills the Joker with an axe?
load more comments
(3 replies)
Add some menthol and capsaicin to the body wash too, just for an extra "fuck you" even after the shower.
load more comments
(1 replies)
I was in a band called Extreme Sensory Hell Shower.
We randomly switched between German Schlager, Doom Metal, Muzak, Swing, Acid Jazz, Reggae, Polka, Latin Dance, Bluegrass, and Hard House WITHIN tracks to make sure that nobody was ever having a positive experience for more than a few seconds at a time.
And no, we weren't especially proficient or even enthusiastic about any of the genres.
load more comments
(5 replies)
A temperature knob could be added to control the pulse width. Get this shower to everyone who designed LED lighting with PWM frequency below 100 Hz.
So the concerns related to LED frequencies are real?
I saw some chatter about them causing headaches, eye strain, and disturbing circadian rhythms, but I hadn't looked further into it to see if it was legit or a "you should use red light on your balls" health influencer type of thing.
I would get headaches from watching PAL (50Hz) CRT TVs for a long time. 60Hz monitors were noticeably better, and 75 or more was good to endure all day. Modern screens don't go blank between refreshes (except PWM-based AMOLED) so the refresh rate is mostly irrelevant unless you want to shave off a few milliseconds of latency for serious gaming (then it's best to match the refresh, render FPS and video signal).
But as I'm walking down the street and move my eyes, I notice cheap lighting whose drivers don't smooth the 100Hz ripple of rectified AC. Especially if they reach 0% brightness during the ripple. This applies to:
- sodium and mercury vapor lights in street lamps
- single-board (aka mains-voltage) LED modules in cheap, powerful reflectors
- any LED bulb or fixture with a constant-current driver whose mains smoothing capacitor is too small or has failed due to heat (however, some such as EMOS and Solight spherical 18W ones refuse to turn on if the capacitor gets too bad, making for an easy repair)
- any dimmable light powered from DC (like 12V and 24V non-addressable LED strips with those cheap flat remotes, or multi-mode flashlights) whose manufacturer was too cheap for a constant-current driver (fair enough) but could have very easily set a higher PWM frequency YET DIDN'T and therefore deserve a PWM shower.
- This is especially annoying with RGB ones because the hue changes during the cycle, creating off-color fringes or even "rainbows" when moving my eyes. I can't believe some people use things like that in/on/around their battlestation: this would totally distract me as my eyes dashed around the monitor while gaming.
- multiplexed displays, especially with low duty cycles (look up charlieplexing, chances are your powerbank or similar gadget uses that to minimize the pin count of its chip) - these are usually over 100 Hz though
So yeah, it's not unhealthy, especially above 60 Hz. But it's annoying for me to look around badly smoothed Christmas lights. And if they are of different phases (this is uncommon for Christmas lights (and even impossible in most American homes because they have 180° aka split-phase 240 V, not 120° 400 V) but always the case with multiplexed displays), I say a long rolling R to vibrate my face and see them wiggle.
When very drunk, I've seen the flicker of normally-functioning fluorescent lights and was theorizing whether my "nervous system was desynchronizing" or if it was nystagmus-related, or if there was even a difference between those two.
load more comments
(1 replies)
Wait, I'm a specialist lighting designer and i haven't heard about this < 100hz LED is bad stuff. From my experience, frequencies at around 50hz or lower is what usually causes eye strain/headaches etc.LEDs are typically 60hz.
I'm guessing the >100hz crowd just need to go outside and touch grass for a few hours a day.
50Hz is what you’ll find in the UK and Europe.
LEDs aren’t 50Hz or 60Hz or anything else. They’re DC devices and they don’t flicker at all if you run them on a clean DC power supply.
The issue with LED bulbs is that they don’t have clean power supplies. They have very simple AC to DC, usually a capacitive dropper. Without filtering, this type of cheap power supply produces a lot of ripple which manifests in visible flicker at the same frequency of the input AC mains power.
load more comments
(7 replies)
I'm guessing the >100hz crowd just need to go outside and touch grass for a few hours a day.
Has to be 8k 240fps grass, though.
load more comments
(1 replies)
load more comments
(3 replies)
load more comments
(1 replies)
Fuck PWM
All my homies hate PWM
Signed: DC dimming gang
load more comments
(1 replies)
I once touched an experiment in the form of a metal wire coil where each alternative loop was hot and the other cold. It felt superhot instead. I feel like this would be similar.
SUPER
HOT
You can recreate this with sausages or some cooked vegetables. We do it at science fairs.
Set them up in an alternating pattern of cold, hot, cold, hot. Let somebody place their arm on top. They'll feel like they just got a severe burn, even though they're fine and the sausages are not hot enough to cause any harm.
If you want cursed showers you should see how Latin America provides hot water to their showers
Wait, what?
Electric heating element in the shower head.
Wat
It sounds scary, but there's no direct path to the electricity since there is no laminar flow between you and the showerhead and most of the water that is passing over the showerhead is not especially electrically conductive because there are no salts mixed into it that don't come directly from the water plant.
It has to actually have a mechanical fault that doesn't cause the shower heater to stop working and you have to come physically into contact with the shower head while that fault is going on in order for you to get zapped.
But it is possible for you to get zapped by them, and some people have died, I am sure, although I don't personally have any proof.
load more comments
(2 replies)
Do they use electric pumps as Britain does?
Britain has 2 showerheads 50cm apart from each other. One has cold, the other hot water
Obligatory, my plumbing is older than your country.
load more comments
(1 replies)
My gf has been dealing with this with her shower for the past 2 weeks without any extra device. Showering there is an experience.
load more comments
(3 replies)
It probably already exists at CIA black sites
Also in my bathroom.
There's something wonky with the water pressure on the cold side. Think I need a bigger tank or something. Pump runs very often and short spans, so the pressure oscillates. Hot water from the boiler is fairly consistent in comparison.
A parallel universe where William Osman still post in his main channel:
load more comments
(1 replies)
That’s just PWM with a liquid.
You call it "sensory hell", but a grifting entrepreneur somewhere is putting together an ad campaign for "Natural healing PulseHead shower! Just $69.99! Comes with our satisfaction guarantee!"
I once had a shower that did this on its own.
I figured that’s the joke, isn’t it?
Also, I’m in the same boat. My current one does it whenever someone uses water elsewhere in the flat.
view more: next ›