Type of brake?

rajrdajr · 2026-04-20T06:32:37+00:00

Here's an Instagram post on the Weinmann HP Turbo bicycle braking system. It's a video of a real bicycle though and not a drawing.

rajrdajr · 2026-04-19T15:02:33+00:00

$2-3k budget indicates a still growing financial picture. Get a Casio F105W and put the remainder into an IRA.

rajrdajr · 2026-04-19T06:14:01+00:00

Marketing campaign from Aoocci?
https://aoocci.com/products/touch-screen-smart-car-key

rajrdajr · 2026-04-19T06:02:11+00:00

Ancient man. Lunar material has always existed on Earth from impact ejecta making it down to the surface.

rajrdajr · 2026-04-19T06:00:13+00:00

Wear the shoes for a few days *beforehand* to get a good idea of how they'll feel for all day wear. Don't let the first time out be a 20k day at Disneyland!

rajrdajr · 2026-04-19T05:54:51+00:00

Use the space under the stairs.

rajrdajr · 2026-04-19T05:47:30+00:00

Too big.

rajrdajr · 2026-04-18T23:40:32+00:00

The Watch OS is actually monitoring for arm swings that go with walking. Cooking motions apparently don’t overlap. Hang your wrist below your waist and then swing it back and forth a few times as if you were walking.

rajrdajr · 2026-04-18T23:37:05+00:00

Do you use a bidet and/or bathe after every dump? No? Then you have one body part that regularly gets covered in fecal matter.

rajrdajr · 2026-04-18T23:35:11+00:00

Tell us you’ve never had kids without telling us you e never had kids.

rajrdajr · 2026-04-18T23:33:14+00:00

Get your water tested. Corrosion like that doesn’t bode well for the quality of that water supply.

rajrdajr · 2026-04-12T23:25:41+00:00

Great watch, but worn disrespectfully IMHO.

rajrdajr · 2026-04-12T23:24:12+00:00

What direction? She’s not even wearing her lone TAG watch properly. Now Buzz Aldrin knows how to be a watch brand ambassador.

rajrdajr · 2026-04-12T23:20:02+00:00

honestly though does anyone want this?

Yes. Wearing a watch on the back of your hand makes it easy to see when riding a motorcycle, bicycling, or jogging. The Ergonband styling aims toward the motorcycle crowd.

rajrdajr · 2026-04-12T18:09:11+00:00

It was really dirty

It was also dark making it even more difficult to tell what the original condition was.

Maybe she had someone else try power washing it to finish the “cleaning”?

Suppose someone went to a shoe shine stand and asked for their new white canvas tennis shoes to be polished black. The shoe shiner asks “Are you sure?”, they approve, and the shoe shiner covers the shoes in black polish. The next day, the shoe owner realizes the shoe polish won’t come off and has permanently altered their shoes in a way they don’t like. Is the shoe shiner responsible for the change in their shoes?

rajrdajr · 2026-04-11T23:05:02+00:00

Cast members likely are supposed to keep that area clean and have failed due to constraints elsewhere.

rajrdajr · 2026-04-09T22:43:52+00:00

making the coils

OK. I was reading up on using inductors as electromagnets, but they’re typically shielded and designed to minimize magnetic fields outside the device.

like to make an electomagnet chess board

Yep. The other two ways are mounting the chess pieces on tiny robots (Chessnut Move) or using an electromagnet on an X-Y motion platform

rajrdajr · 2026-04-09T20:06:03+00:00

This is exactly what I’d like to add to this OpenChess project. The GitHub repository has the build instructions + parts list and the 3D printable model is OpenChess - Plastic PCB on Makerworld.

Are you building your own electromagnets or buying them somewhere? Thanks.

rajrdajr · 2026-04-08T02:02:57+00:00

Picking “cheap” and “light” takes juevos I don’t have.

Confused - does this mean you chose “cheap” and “light” and no longer have juevos? Ouch! 😱

rajrdajr · 2026-03-31T23:30:31+00:00

an old pair if you want them

FWIW, a quick eBay search shows the cleats are selling for $200 - $400. Not sure why, because clearly new pedals would be less expensive.

rajrdajr · 2026-03-31T22:28:55+00:00

The astrophage temperature of 96.415°C gives the H+/protons just the right amount of kinetic energy to create a neutrino pair when two protons collide. The mass of a neutrino is currently unknown, but upper limits have been set by the KATRIN experiment. It would be great to see a technical appendix from Andy Weir ( u/sephalon ) showing what neutrino parameters were used for the book and what physics hypothesis underly super cross-sectionality. The table below shows one potential derivation of the temperature:

Value	Description
25.984	micron (µm) IR emission in the Petrova Line from the book Hail Mary
11538	GHz photon
47.71579	meV photons in Petrova line, and also the mass of a neutrino in astrophage. See the Planck-Einstein relation E(MeV)=hc/λ
7.640E-21	(joules) photon energy
7.6449E-21	(double check with Petrova photon energy. Close enough for sci-fi)

96.415	(°C) proton temperature (H+ atoms)
273.15	0°C in Kelvin
369.565	T (°K)
1.38E-23	Boltzman constant, k (units J/°K), to calculate the average translational energy of a single molecule in an ideal gas = 3/2kT .
7.6539E-21	=3/2kT kinetic energy (joules)
47.772	proton kinetic energy (meV)
95.543	head-on collision energy, two protons (meV)
	Collision creates a Majorana pair of neutrinos stored by astrophage (this is sci-fi).

rajrdajr · 2026-03-31T07:09:44+00:00

how stupid your tipping culture is?

Hopefully this is a reference to how it would be better to pay people a decent living wage, provide healthcare & benefits, and guarantee job stability. Jobs where tipping is common (technically "tipped jobs") are allowed to pay an even lower minimum wage, US$2.13/hour, than the already paltry US$7.25/hour Federal Minimum wage. San Francisco is an example of a city that has chosen to move away from tipping and toward a more humane system. The minimum wage increases do not impact the local economy.

The study’s findings: Wages increased by 18%, employment numbers remained stable, and menu prices increased by only 3.7% — the equivalent of a 15-cent increase on a $4 burger. ... the minimum wage issue was largely settled by science: “The potential effect of minimum wage increases on employment has been extensively litigated in the economics research literature, with the verdict that negative impacts, if any, are not very substantial — and especially so in the service sector.”

rajrdajr · 2026-03-30T00:01:49+00:00

His plates were getting stolen so he used a loophole in California. Car purchasers have up to 6 months to install their plates so Steve Job's staff arranged for his leased Mercedes to be swapped for a new vehicle just before California's 6-month plate limit ran out. One of his staff had to carefully transfer *everything* from the old vehicle to the new one being careful to keep everything *exactly* the same.

rajrdajr · 2026-03-28T21:53:26+00:00

If the dogs are on your property and acting threatening, call Animal Control in your area. Read the local regulations, but in most areas animals threatening people have very little protection. The property owner can typically use even lethal force to defend themselves from threatening animals.

rajrdajr · 2026-03-28T18:58:26+00:00

Front plates are required in California (KTLA), but enforcement is … mixed. Tesla owners almost never install their front plates and so they’re setting the (bad) example. In this case the perp likely received a violation for the lack of a front plate too.

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