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@nazokiyoubinbou @lispi314 @aparrish @catsalad No, I mean motors from outdated 3d printers are something cheap you can find on craigslist/ebay/fb-market/etc.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 @dalias @aparrish @catsalad The buck-boost converter mentioned in a previous post would be the voltage part.
Output voltage is pretty much a function of the windings in the motor, and the input informs the output when run by load.
Output voltage is pretty much a function of the windings in the motor, and the input informs the output when run by load.