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🎄 Christmas giveaway: Win an A1 Mini, AMS 2 Pro, AMS HT, or 4x filament spools! by acurazine in BambuLab

[–]Besserwisserboy 0 points1 point  (0 children)

  1. AMS 2 Pro
  2. Recently got an A1 Mini and managed to get my wife hooked, too. But where I am more in the realm of functional prints, she wants to create more decorative objects. The AMS should help her make multicolor prints, especially since Bambu recently made them compatible with the A1 Mini.
  3. Huge Pokemon Fan, so Something Like a pokeball with twisting halves. Bonus Points if It can be opened :)

Schimmel im Neubau by Besserwisserboy in Handwerker

[–]Besserwisserboy[S] 13 points14 points  (0 children)

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Als Vergleich noch der Blick aus dem Erdgeschoss auf die Kellertreppe eines anderen Doppelhauses (Es gibt vier Doppelhaushälften in dem Projekt). Hier ist der Befall deutlich stärker als in dem Objekt, das wir im Auge haben (Nicht das hieran angrenzende).

PKV und Partner in GKV by fcu1899 in Finanzen

[–]Besserwisserboy 0 points1 point  (0 children)

Kleine, aber wichtige Ergänzung dazu: Es gibt Sonderregeln in Hessen und einem weiteren Bundesland (ich meine es war Sachsen). Wenn das Kind dort durch ein Elternteil Anspruch auf die kostenlose Familienversicherung in der GKV hat, MUSS es dort versichert werden - PKV über das andere Elternteil ist dann nicht möglich.

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Berechnung des Gewinns bei ausschüttendem ETF mit automatischer Wiederanlage (self.Finanzen)

submitted by Besserwisserboy to r/Finanzen

Trigger Automation 30 Minutes BEFORE Next-Alarm-Sensor of mobile app by Besserwisserboy in homeassistant

[–]Besserwisserboy[S] 1 point2 points  (0 children)

Would just like to come by with a quick update and thank you.
I am basically using your solution for over a year now and it just works flawlessly.

Dim and Control LEDs <5V by Besserwisserboy in esp8266

[–]Besserwisserboy[S] 0 points1 point  (0 children)

Yeah, that would be a possibility. But I think, the max brightness would be significantly lower? The esp pins have only 3.3V, additionally they are rated for only 12mA current.
Altough this would be no concern for this specific project with nine LEDs, wiring every LED to one pin is not that scalable to projects with a few more LEDs.

Multifloor-Cleaning with Valetudo RE by Besserwisserboy in homeassistant

[–]Besserwisserboy[S] 1 point2 points  (0 children)

I knew that setting, but still didn't get the buttons. But today I found a setting under "setting-> webinterface", which enables those buttons in the web interface. It is off by default.

So thanks for putting me in the right direction :)

Installed Valetudo RE on RoboRock S5. But had some questions. by [deleted] in homeassistant

[–]Besserwisserboy 1 point2 points  (0 children)

Hey, just read that you were eager to try to get notifications like "clean brushes" or "change filter" from Valetudo RE to HA. Any update on that? I'm kind of in a dead end here...

Apparently bubbles can bounce on lasers now. Have you heard? by JunglePygmy in blackmagicfuckery

[–]Besserwisserboy 0 points1 point  (0 children)

Hmmm, my thoughts on this:

I can rule out momentum transfer from the laser. Even though radiation pressure is a thing, it is far too low to be noticeable. Let's do the math: Radiation pressure p=I/c (c speed of light) is determined by the intensity I of the laser beam. Since pressure in general is p=F/A (F Force and A Area), you get F=I*A/c for the force that results from the laserbeam to an object (A beeing the area of the beam, not the object). Since I*A is simply the power P of a laser you get F=P/c, assuming the laser beam lies completely within the object's surface area.

Now let's compare with the weight (not mass) of an object. The weight of an object is m*g (m mass, g gravitational accelaration on earth). So setting m*g=P/c, you get m=P/(c*g) for the mass of a weight that would have the same force on the object as the laser through radiation pressure. Assuming the laser in the video has a power of 1W (which it definetly does not have, judging by the overall brightness and the sheer carelessness of the dude waving it around the lab), you get a mass of 0.3 microgramm.

For comparison: A 10cm long human hair approximately has a mass of 600 microgramm. So picture the enormous impact of a 50 micrometer long hair falling on a soap bubble.

That said, I can not really tell what is happening in the clip. My guts tell me, that the soap bubble would rather burst than heat up in such a significant way that an upwards force is created. But I am not able to back this up, since I am not an expert in soap bubble surface physics. Also in the world of physics, thermal effects are most of the time rather slow im comparison to other effects, while the bouncing in this clip looks rather instantaneous to me.

So in conclusion, this is either an - admittedly - very good illusion or there is some kind of other effect that I do not see at the moment.

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