allisonmy iphone insists on telling me that if i'm charging from my laptop's USB-A port, I'm using a "slow charger." i dunno, keep your opinions to yourself man. maybe you're just bad at charging, did you think of that. "waaaah i'm only getting 500mA" entitled little asshole
Cat 🐈🥗 (D.Burch) 
Nazo
Cassandrich@nazokiyoubinbou @catsalad @aparrish That's gotta just be a garbage quality product, because you should be able to produce well over 10W cranking a proper dynamo by hand, plenty for a "fast charge".
LisPi@dalias @nazokiyoubinbou @catsalad @aparrish The good ones are also very expensive here.
As in "it's much cheaper to buy a foldable solar panel charger" expensive.
As in "it's much cheaper to buy a foldable solar panel charger" expensive.
@lispi314 @aparrish @catsalad @nazokiyoubinbou Used 3D printer stepper: $0-2. Rectifier diodes: Maybe $1? Capacitor: a few cents. USB PD module with integrated buck-boost: $5. Gearing: a few cents. Plastic housing: a few cents.
@dalias @lispi314 @aparrish @catsalad
Used 3D printer stepper: $0-2
I love that you assume we have a 3D printer already to install that in... Those few dollars/cents suddenly becomes several hundred... And what if we don't really have the know-how to actually modify and use one?
It would be cheaper just to buy one of these things than to try to make one that will fall apart after three uses.
@nazokiyoubinbou @lispi314 @aparrish @catsalad No, I mean motors from outdated 3d printers are something cheap you can find on craigslist/ebay/fb-market/etc. Motors out of broken vacuum cleaners made to break as soon as the warranty period runs out would also be very suitable.
@dalias @lispi314 @aparrish @catsalad Can't speak for them, but I sure wouldn't know how to modify all that. How do you guarantee it's the right voltage even? You'll tear up your electronics pretty fast if it starts putting out 120V on that USB cable... I think you'd have to add a DC-DC converter or something? Though even that could blow out if it's too extreme. I have no clue.
It still just suddenly turned into a whole huge thing that I'm pretty sure still isn't really that much cheaper and certainly is a lot less ideal than just buying a cheap one.
@nazokiyoubinbou @lispi314 @aparrish @catsalad Rechargeable vacuum cleaners typically are labelled with the voltage the motor runs at, which is what it should produce if turned at the same RPMs it'd run at. You'll get lower voltages turning it slower. The USB PD module with integrated buck-boost (a DC-DC converter) was in the "BOM" in my above toot.
@dalias @lispi314 @aparrish @catsalad Oh rechargeable vacuum cleaners. I thought you were suggesting a full blown one since you wanted to get lots of wattage out of it.
Well, that's another point where this gets more complicated than "just slap a few parts together." If one just reads vacuum cleaner, well, you see where this is going.
Not everyone can just slap all this together and presto, they have one of those. That's all I'm trying to say. You treat it as if it's weird that we don't just fire up the 3D printer and grab the soldering iron and presto, but it's not really a thing just everyone can just do on a whim.