djharby Posted September 6, 2015 Share Posted September 6, 2015 Hi, everyone!! I was thinking about building a usb power bank simular to LUXA2 P-MEGA 41,600mAh. Anyone have any ideas on boards or wiring? I want tons of capaticy several 2.1 amp usb ports. This could make a cool build for the show. Thanks :) Quote Link to comment Share on other sites More sharing options...
flops Posted September 11, 2015 Share Posted September 11, 2015 i think you should just buy it... its not even that expensive :D Quote Link to comment Share on other sites More sharing options...
djharby Posted September 20, 2015 Author Share Posted September 20, 2015 I just think it would be fun to build. using a bunch of 18650 cells. I just need to find a board with more than two usb ports. I would like two 1A and two 2.1A ports, or wire 2X two port boards together. Quote Link to comment Share on other sites More sharing options...
cooper Posted September 21, 2015 Share Posted September 21, 2015 (edited) I just think it would be fun to build. Which is the VERY BEST of reasons. And hey, you might even learn something as you go. Who knows? The way I'm seeing this is you need a beefy 5V battery, a stack of USB ports and some circuitry to deal with powering the battery. The USB ports themselves should be trivial. Something like this should be a good start. Unscrew it from the metal bracket and use the screws and holes to affix it to your own case. Attach the red cables from the USB plugs to +5, the black ones to ground and snip off the white and green cables (which are for data, so can be discarded here). There won't be anything there preventing the attached USB device from pulling in more than 0.5A but I'd expect only devices that can take it to actually claim that much. Let it be their responsibility (and on the plus side: you can now use your power bank to run a Raspberry Pi off of). So the only remaining problem I can see is battery selection and charging circuit. Maybe someone else has a well-founded opinion on that? Edited September 21, 2015 by cooper Quote Link to comment Share on other sites More sharing options...
djharby Posted September 21, 2015 Author Share Posted September 21, 2015 Thats the part i am trying to figure out is the circuitry. I have only seen boards with 2 ports. Quote Link to comment Share on other sites More sharing options...
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