Beginner Question Thread! 2023 Edition

the bigger the mass (volume), the more heat it can absorb before saturating. the more surface area exposed to air the better performance of said heatsink. there is a balance u need to consider, not just slap the biggest chunk of metal on it and call it a day.

if the air exposed area is same for both heatsinks and they are made of same material, then the one with more volume should have better performance.

but there is also thermal conduction that u need to consider, as different material transfer heat differently, for example:

aluminium


vs
copper

and compare to a even thinner aluminium

u can play around with these number on here with bunch of different material to select:

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This isn’t really correct.

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Hi, after breaking my foot due to an esc error and over discharging my practically brand new battery pack which I poured my heart into building, I took a few years brake from eskating. Not a concious decision. Kinda just lost interest a little bit.

Anyway… Very cool to see you guys made a new independent forum and to still see some familiar faces.

Now to my question: is there a place where I can efficiently read up on what I have missed regarding technical development? What are the standard parts that everyone uses nowadays? Any new best practices? I know back then, focboxes and Samsung 30q cells were all the rage. Did this change?
I see unity is back from the dead. Does Jason still produce them? Are they any good? Ackmaniac still around?

So I would be glad if anyone can for example recommend 2-3 good build threads that you consider pretty much standard so I can get up to speed :slight_smile:

Feels good to be back.

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Molicels (P26A, P28A, and P42A) are pretty much the gold standard for moderate to high power packs now. The really high p-count packs or lower power ones can use the 5000mAh 21700’s that have been appearing over the past year or two.

30Q’s don’t have a very good rep anymore as there have been complaints of them forcing pack voltage imbalancing that’s a lot worse than other cells. Nothing definitive yet but enough people have been complaining about it that it seems something is up.

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That’s a good point unfortunately I don’t have copper on hand atm

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So, I’ve just blown my charger… :rage:
I just plugged it in (wall first, then board), it sparked near the charge port and now is dead!

The only thing that was different in my board was an inline fuse holder with a 15A fuse, I installed yesterday

As you can see the fuse popped and saved(?) the rest, but the charger is toasted

My question is, what went wrong? Is it that the fuse holder is rated at 32V? Should I just throw it away and just solder a fuse there? Should I just go back to fuse-less (it was working fine for 3 months now)

I never fuse my charge port. Just try not to stick stupid shit in there

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Or use a female charge port. Or something like TrueConn/PowerConn that’s short-proof

I don’t think we have a dedicated thread for it.

  • Ackmaniac has been MIA for years now.
  • Jason is (unfortunately) still around selling subpar parts (please avoid anything coming from Jason)
  • Most have switched from 18650 to 21700 cells
  • We now have many many more Esk8 parts vendors creating awesome products
  • BLDC is basically no more, everyone uses FOC
  • Gear drives have become a big thing, direct drives and hubs lesser so.
  • A lot of new Esk8 brands have emerged (for better or for worse because now apparently everyone and their dog is creating a subpar esk8 brand)
  • Many new VESC options (unfortunately quite few broken ones in recent times)
  • speaking of, high voltage is the new shizz for some part of the community going 16s, 18s+ etc. I’ll stick to 12s for now.
  • prebuilts have done big jumps from the initial 2018 shitty hub motor boards, now big 2 in 1 boards.
  • still a lot of lies in the china board segments
  • We lost some vendors, some members
  • lots of Drama

I’m sure there’s lots more that I can’t think of at the moment.

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Hahaha thank you VERY much for the entertaining summary <3
Don’t know how I feel about the high voltage… 12s felt like plenty back in the day :slight_smile:
Glad I missed the drama.

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Is there any news on a good panel mounted plug for connecting sensor wires to the enclosure?
(Doesn’t come loose, break, waterproof?)
I know that is one thing that I really used to search forever.

Like these? Though a bit bulky. I think the majority used a grommet like plug to just feed them through.



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The smallest ones i have found are gx12, but they’re not exactly awesome.

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Even different aluminium alloy would yield different result on thermal transfer.

But to be real here, I think any heatsink would work relatively well in our use case, the chance of anyone ( regular people, not racing board, most of them don’t use vesc anyway) can heat up enough to saturate the heatsink is very silm. And if u really saturated a heatsink, u kinda doing it wrong

I have a even smaller one for sensor

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Talk to me

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Are you sure the polarity was correct? This sounds a lot like the + and - being backwards on the charge port.

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These “M8” 6 pin connectors are a little smaller :smiley:

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Why does strain relief gotta be so long!? :sweat_smile:

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Wow these look awesome if you have enough space.

I used to feed the cable through a rubber grommet but I hated having my motors or esc stuck to the enclosure. Made opening and modifying a pain.

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