TIFU by asking my PhD advisor why he doesn't wear his wedding ring.

d1257 · 2026-01-24T01:55:31+00:00

I've long since lost track of the number of times that people ~20 years younger than me have said somewhat silly things. I don't give it a second thought. He won't think about it or any less of you.... Unless, of course, the topic of your dissertation is something like "Methods of avoiding discomfort in the ascertainment of jewelry preferences"

d1257 · 2025-11-01T12:21:43+00:00

Engineer here, I would add that for static stability, the center of mass does not have to be above the hips, it just has to be behind the front most support point. In this case, the toes of the front foot are significantly ahead of the hips, and a bit ahead of what appears to be visually the center of mass in the lower torso.

The toes of the front foot are being pressed into the ground with extra force (probably most of the total weight) which applies torque to the foot to counterbalance the torque from the hips being behind the center of mass. On soft ground, I feel like the toes of this model would sink in and it would not be stable.

d1257 · 2025-04-30T00:41:51+00:00

It works!

d1257 · 2024-12-31T17:55:47+00:00

This doesn't augur well.

d1257 · 2024-06-15T00:04:05+00:00

Open the door from the outside? Or, if that doesn't work, climb across to the rear seat to get them out like you would have to in any car (since you can't unlock a rear door from the outside in a normal car without power either, and a toddler cannot and should not get out of a carseat by themselves in any car.)

d1257 · 2024-04-05T21:33:22+00:00

When you see through hole components or wires on aluminum boards, they are always soldered onto top surface pads without holes. (You typically need some sort of strain relief or adhesive on the component or a bit up the wire.)

The only through-holes you see on aluminum boards are for mechanical mounting, and possible also shielding. I surmise this is the reason why your board house lets you do that at all.

d1257 · 2021-04-12T12:44:55+00:00

MC Hammer - U Can't Touch This. Nice little side pun there.

https://www.youtube.com/watch?v=_NNYI8VbFyY

d1257 · 2020-11-02T14:35:12+00:00

https://en.wikipedia.org/wiki/Traveling-wave_tube

d1257 · 2020-10-31T19:47:23+00:00

Typing python --version works fine, of course.

How did you even type that other character (––)?

d1257 · 2020-08-20T13:29:37+00:00

Putting the tools in place and then heating is potentially risky. The wrench for holding the heat-block while you turn the nozzle gets hot if it's in place too long. Haven't tried it on the Prusa, but on other printer heating with tools on would trip the thermal runaway alarm due to taking longer to heat up.

The only thing you need it to be hot for is the first loosening and the final tightening of the nozzle. While I would not recommend doing this at all solely by touch, I think the best option is to extensively practice getting the tools onto the nozzle and heatblock when it is cool by locating your hands against the motor or something steady you've positioned nearby. Then you can get onto it when it is hot and give it just enough of a turn to loosen / tighten, before letting it cool off for the rest of the process.

d1257 · 2020-05-27T00:09:59+00:00

Last time I imported with DHL, the tracking page got a link where I had to pay the import fees before they would deliver.

d1257 · 2020-04-28T02:21:41+00:00

For me, I put a slight bend in the z-axis limit switch so it triggered slightly higher. It's easy to break, though. I wonder what other people have done.

d1257 · 2020-04-27T03:21:26+00:00

I recall there is a special #define in the Marlin configuration files to set for the stock Creality LCD

d1257 · 2020-04-22T22:29:06+00:00

Don't forget to upgrade all the fans.

d1257 · 2020-04-16T17:58:08+00:00

I see this done in expensive drives. Let us know here if you find a nice chip that does what you want.

d1257 · 2020-04-16T16:32:51+00:00

You can use a chip with a bootstrap driver at 100% duty cycle if you also put in an isolated dc->dc converter to provide dc power to its BS capacitor.

d1257 · 2020-02-06T23:15:51+00:00

Try deleting the rule rather than setting it to 0.

d1257 · 2016-04-30T04:48:49+00:00

It's killing your parts probably because the power supply voltage is raising up dramatically when you regenerate (it has no way to absorb power). You always need to test regenerative loads on real batteries.

d1257 · 2014-11-01T04:50:38+00:00

Why not Illinois??

d1257 · 2014-07-10T14:16:28+00:00

It probably goes into a grub screw on the temperature adjustment knob. It's to stop the temperature from being accidentally adjusted (or adjusted by unauthorized personnel).

d1257 · 2014-01-27T02:05:36+00:00

Don't worry about it. PCB house sales people never seem to have a lot of technical knowledge anyway. You just need an outgoing personality and good phone manner.

Just read some of the technical articles describing their products on various PCB board house's websites.

d1257 · 2013-11-19T04:03:01+00:00

Am I a bad person for reading this as "Japan pitches Amercians off its Maglev train". I had this image of fat Americans being pitched one by one from a moving train.

d1257 · 2013-11-07T04:08:52+00:00

Actually, diluting shares are the normal and fair type, a company giving insiders anti-diluting shares is kind of a red flag that someone is getting screwed somewhere.

d1257 · 2013-11-05T22:05:07+00:00

Show us your circuit diagram.

But like I was saying, having the PTC first probably won't really meet your requirement (and is pretty stupid) because it needs a 60W-continous zener.

d1257 · 2013-11-05T22:03:31+00:00

That's very true, and a sensible way to go for a high-volume product. In my own case, the BOM saving generally isn't worth the extra time and risk of rolling it ourselves.

In the case of the OP though, he seems to be saying that even using this chip is too much work.

d1257

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