Gallium Nitride (GaN) Charger for Esk8

Excellent summarising, you spotted my original intent. I had too many weird eyes over the years when I was in Starbucks, which is why I was inspired to bring this project to light

Sure - but someone mentioned using a better fan. You can get much quieter fans than the cheap ones that come in the existing chargers.

I have a 210w exway GAN charger, and it is fanless. But it also gets borderline dangerously hot. So… obviously there’s something to be said for making one that doesn’t perform that way. But still.

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i wonder Is the goal not achieved? or not achievable? (by a significant margin )

How much of a charger’s size can really be reduced by being more efficient?

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Are you just ignoring what we’re saying lmao

The extra length defeats the purpose of a volumetrically smaller charger. Additionally, in a backpack, you won’t be able to even notice the difference, unless you can’t fit the GaN charger cause it’s too long.

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If you have looked at fan options as I have, you’d see that a fan that fits in a reasonable size with this charger will not be quiet. The very fact that this has a smaller overall volume really kills the options for installing quiet fans.

In fact, the length is smaller with the regular charger, and everyone knows length matters so

My point is, I’d rather have the radium size than the longer one

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my $60 12s10a charger with a quiet fan would like a word

Possible since youre trying to bring a charger of menial specs to market @300$ retail.
Thats up there with the Cycle Satiator which is much more capable.

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I think you can afford a $5 (10?) noctua fan in a $300 charger

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i think there’s some debate that thickness matters. :stuck_out_tongue:

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Sorry missed this message

To me, a 27mm length increase is infinitely less important than the 19mm height decrease. Having a thinner profile allows it to be both wielded easier and packed easier. Maybe you guys can find some foam and cut it to size and compare how they pack inside a backpack, but me personally as well as the people I’ve showed irl and had their hands on with this charger already all agree that the thinner profile is much more advantageous than having it shorter

What’s the decibel reading on it from a metre away

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Okay, this is a more appropriate statement, rather than calling the radium one smaller calling it shorter in the length dimension I think is a more correct argument. I respectfully disagree with having it shorter is better though, maybe someday when you get your hands on it you’ll see my POV

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Everyone knows it’s about the girth… or in this case lack there of

The silicone is like $6 already, it’s not really about the cost of adding it that’s stopping me from doing so

so… IIUC.

the potting makes it heavy but also somehow makes cooling better?
so… in order to reduce weight ( a reasonable feature) (and repairability as maybe a bonus) people propose no potting, and are countering with use a fan to cool, use a quiet fan to stay within noise requirements.

concerns of fan are with a small case, airflow for cooling will just be too noisy. counters are… "are you sure? "

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does it add 20-40k in RK&D? :scream:

Okay, since everyone is so mad about the pricing, what would YOU guys like me to do with it? I can bring it way down and make about $0 per unit by selling it at $200 for charity, which for the record, I am willing to do so. However, doing so will KILL the hope of ever gathering enough capital to do the UL certification, which, as mentioned before, could cost between $20000 and $40000 USD depending on the performance rated, which mine exceeds most chargers out there, so it’ll definitely be on the more expensive side. Even at the $300 price point, I’ll only be able to finance that certification after about 200 - 400 units sold, which, let’s be honest here, I don’t see that much enthusiasm supporting that number of sales within a reasonably short period of time.

Are we, as a community, OKAY with it only having CE, ROHS, and CCC certificates? If we are, then we can work out the new price and be happy with that.

I am aware of the existence of other GaN chargers already in our industry, but most of them use GaNFets made here in China instead of importing Japanese, Taiwanese, or American GaN components, that’s why they overheat so much. The Fets I’m using, as previously mentioned here in this thread, are from Transphorm, a leading company in the industry next to GaNPower, which makes chargers and power supplies for Apple. Believe me when I say that I want to reduce the price, too. I think making on-the-go charging a more enjoyable experience is crucial to the experience of group rides, and group rides are hands down the single most integral activity supporting this community even if racing takes off in the future, as group rides are for everyone and all skill levels. That’s the change I wanted to bring by working on this project.

From where I’m sitting, maybe a feature-rich, high power, low profile charger that isn’t utilizing GaN technology would have been a better idea. IE Radium

The price is just not worth the benefits imo

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find me like someone who knows how to desolder a compact SMTed PCBA, able to ID the broken component just by looking at the part without having the BOM at their hand, able to source the component in singular digit units, and able to resolder it back onto the PCBA, and able to salvage the firmware from the broken component then re-flash the proprietary firmware if the component broken was the one storing it, and miraculously revive it?

I’m the guy making it and I’m not even confident enough to be able to fix that…