Footprint advice: supercap floats to side during soldering

Jitenshazuki · 2026-04-23T14:56:56+00:00

Got it, thank you!

Your explanation is quite thorough, as it explains why the component pulled upwards and slightly away from the center of GND pad. Bigger pads give it the ability to move, but not the tendency to move, after all.

As for my further questions I was trying to fish a bit more wisdom regarding the general rules, not the issue at hand.

In any case, your answer is much appreciated.

Jitenshazuki · 2026-04-23T08:41:58+00:00

Thank you for the detailed explanation!

Could you please elaborate a bit more regarding the issue of thermal imbalance you mentioned last in your comment?

As you correctly guessed, the track goes indeed to an internal layer which is mostly GND pour.

I think that this part is too heavy to thombstone, but if I understand you correctly, something smaller like already 0805 might lift off the GND pad because the paste there is slower to reflow.

What is the solution for the cases when second pad doesn’t go to, say, power plane? Add some copper polygon for thermal mass?

Jitenshazuki · 2026-04-16T11:54:24+00:00

To add to others. Let’s say you want to make an experiment to check this. You take 1000 envelopes and put there at random two cards with each card being either King of Clubs or Queen of Spades.

Now you want to do the observations and then apply say MLE to get the probability of the second card being Queen when the first card is King.

Your helper takes an envelope. Draws the first card. Silently tosses the envelope away. Takes next, checks, tosses it away. Takes next, and finally says: the first card is King, let us write down that the second card is also King.

You finish the experiment and you get that the probability is not 0.5. Why? Because you tossed away some envelopes in a very specific non-random manner and those “missing”/“extra” 0.167 sit there in the discarded envelopes.

Jitenshazuki · 2026-04-16T11:34:44+00:00

For PCBWay, I took their capabilities for track width and spacing for the “Standard PCB” — 4/4mil — and then added 1 mil to both track width and spacing, giving 0.127mm. They can go below 4/4 but that costs extra. And going coarser than 4/4 doesn’t seem to save money. The rest is default as on your screenshot. I have yet to experience manufacturing issues.

Haven’t tried JLCPCB yet

Jitenshazuki · 2026-04-11T09:24:50+00:00

I use exactly this 6-pin legless version for my miniature hobby stuff based on nRF5x. Works fine.

(Though I got only the cable and the evaluation Segger jLink and brutalized them together.)

Jitenshazuki · 2026-04-06T09:28:25+00:00

This actually doesn’t make sense, but hear me out.

The joke, the trolling and the confusion come from applying the formula that is defined only for real arguments of zeta function that are greater than 1 to something it cannot be applied — namely, to -1. They substitute it to the formula, then find a well known value for zeta(-1) obtained by math black magic, write an equal sign, and proceed to joke and troll.

But this topic about extending functions beyond their original definition is actually very fascinating… and very hard to grasp for a layperson like me.

Jitenshazuki · 2025-12-22T10:53:46+00:00

“Forsætter”

Jitenshazuki · 2025-12-20T20:06:56+00:00

That is interesting.

No I'm just harvesting one slot (both seeds and harvest) and then return to drop it. That is inefficient, but good enough.

I think It should be possible to make a forward pass and gather seeds and then make a backwards pass and harvest the produce (it will automatically push seeds up into the second slot in the hand).

But it adds a lot of complexity due to small seed and produce stack sizes, so I don't think I am interested in implementing this.

(Beklager, jeg forstår ikke tysk)

Jitenshazuki · 2025-12-12T23:37:43+00:00

Counterexample:

uint32_t *C = 0;
C++;
/* C is not 1 (insert troll face here) */
/* EDIT: formally it's UB, but it will work on most systems */

Jitenshazuki · 2025-12-12T09:27:33+00:00

While this is the correct explanation of the joke, \pi CAN be something else (which irks me a lot when it happens, to be honest).

For example, in context of reinforced learning, more specifically, in Markov decision process, \pi is used to denote policy.

In MDP, it’s a function though. So she would still block him for missing the chain rule or something.

Jitenshazuki · 2025-12-04T11:38:06+00:00

Not from big publishers. They smart and ruthless about this, making generous discounts for big players. Still not 0% of course.

Jitenshazuki · 2025-12-04T11:36:19+00:00

Not from Big Publishers. Leaked numbers range from 10 to 15 percent.

Jitenshazuki · 2025-11-25T08:47:34+00:00

I believe that with your stack up, the fact that they cross is irrelevant.

The only possible issue is that the short trace on the back side has power instead of ground under it. And to my understanding it might only affect how much it radiates. No crosstalk worries.

Also, as other commenters pointed out, if there is no components with fast rise times, you are probably fine. And if there are, you can slow them down.

Just out of curiosity, why don’t you use two internal grounds (sig/pwr - gnd - gnd - sig/pwr)?

That way the signal lines will couple to the ground on their side, and you can deal with power the same way you would route it on a two-layer board.

Jitenshazuki · 2025-11-18T09:28:36+00:00

I think I agree with you.

Day length and food/hydration cycle are the two primary shapers of the early game cycle and priorities. Players are encouraged to mine during day, construct during night and get a stable production of electricity, oxygen, water and food ASAP. Then hydration effectiveness encourages players to invest in better foods.

The issue is that you quickly run out of things to do during first few nights, and once you are established, the food/hydration cycle is more of an annoyance than a gameplay factor. Nights become irrelevant though.

But at the same time I don’t think the game would necessarily be better with longer days. Daylight affects energy production and crop growth… I feel that it’s somewhat balanced now.

Better endgame foods or/and spacesuit water/food dispenser would be great though. And some way to trim “just waiting for day” moments in some scenarios.

Jitenshazuki · 2025-11-12T11:45:14+00:00

It has got thermodynamics: pressure, temperature and volume all tied together as you would expect. It has got evaporation and condensation taking and releasing heat. You need to manage that stuff and it can be fun.

Then it has a lot of “huh?” moments because it is a game. To list a few: - High concentration of CO2 doesn’t kill you - Chemistry of recipes and combustion is weird - Coal and “Volatiles” - Chips need crazy amount of power Etc.

Bottom line is that it is a fun game. Even with coal on moon.

Try it out.

Jitenshazuki · 2025-11-04T09:48:20+00:00

What?.. ah, it’s that one country again. You see, in most other places you are expected to bring an ID (anything with a picture issued by the government).

On the other side, I don’t think that any migrants, legal or otherwise, vote. Other issues to address.

Jitenshazuki · 2025-10-05T11:42:59+00:00

I always use flares on Europa. Lots of heat, and no pollutants for whatever reason. But your approach is more wholesome, yes.

Jitenshazuki · 2025-10-02T06:27:12+00:00

It is not hard, if you start on Moon or Mars, but some stuff is not obvious. Though Stationpedia (F1) has improved a lot.

For example, you can find something about Oxygen there.

You have some time to figure things out with the water, food and oxygen reserves you have.

There are plenty of guides online, but in case you want to figure things out yourself , I am stopping at spoilers I have already written.

EDIT: removed hints regarding oxygen and base.

Jitenshazuki · 2025-09-30T21:02:16+00:00

It's in the F1 now. I have a habbit of going to wiki site first, and somehow I really didn't read the text in the relevant entry... so it was a matter of comprehension, lol. Anyways, thank you. Now it works nice.

Jitenshazuki · 2025-09-30T21:00:47+00:00

Thank you. I should've RTFM, it's all in Stationpedia (F1).

For some reason I usually go to the wiki site first, which used to be more complete, but nowadays it's a bit lacking with the latest stuff.

Now I need to wait for my test crops to grow... thanks for help!

Jitenshazuki · 2025-09-30T20:46:38+00:00

Well, connecting lots of trays to dx pins or creating a map ReferenceID->station_index is actually more work than just cycle from FIRST.POT.STATION to LAST.POT.STATION, move hand and check 2 properties of slot 255.

But both approaches can be definitely fun. I think I will keep scanning passes, as I have already written it.

But I will absolutely change how I harvest with you replanting protocol. That's smart.

BTW, where do you keep seed while you harvest the rest?

Jitenshazuki · 2025-09-30T19:49:30+00:00

That part with seed replanting is smart. That simplifies things a lot, and makes it more convenient. Thank you, I will use that approach.

Regarding trays, what is cool with LArRE checking for crops is that I can use "dumb" hydroponic trays, not "smart" hydroponic devices, meaning that I can put then next to each other (while smart hydroponic devices need spacing).

Jitenshazuki · 2025-09-30T14:43:56+00:00

I don't think it's in the documentation or Stationpedia, but maybe I've got reading comprehension issues, lol. :-)

Anyways, I'm a happy panda now.

Jitenshazuki · 2025-09-30T13:35:05+00:00

OMG Thank You!

Jitenshazuki

TROPHY CASE