Electronics > Projects, Designs, and Technical Stuff
USB Battery Bank Auto Shutoff
Peabody:
No, certainly not. Having gone this far, I just thought you might want to know how little current it would actually take to keep it alive. But I guess that's not the case.
SilverSolder:
To get to the absolute minimum current to keep it alive will probably require a micro to do accurate timing, and go into deep sleep while it is waiting until the next "kick".
engrguy42:
Well, FWIW, this thing is all soldered and done, just waiting for a USB female plug and a box. Seems like a lot to go thru just to get a pulsed load, but hey, it should be of use for a long time.
I was surprised when it was all soldered that it actually worked !!! Now I have a solid 10 amp-hour, 5VDC supply.
Hmmm....do I need a boost converter? :D
SilverSolder:
--- Quote from: engrguy42 on May 13, 2020, 07:34:46 pm ---Well, FWIW, this thing is all soldered and done, just waiting for a USB female plug and a box. Seems like a lot to go thru just to get a pulsed load, but hey, it should be of use for a long time.
I was surprised when it was all soldered that it actually worked !!! Now I have a solid 10 amp-hour, 5VDC supply.
Hmmm....do I need a boost converter? :D
--- End quote ---
Looks good! These 5V power banks are super useful for electronic projects.
Would be cool to open one up and modify it inside. Mine is completely sealed so it would not be a good candidate... wonder if that is true of all of them...
kjr18:
--- Quote from: SilverSolder on May 13, 2020, 09:12:31 pm ---
Looks good! These 5V power banks are super useful for electronic projects.
Would be cool to open one up and modify it inside. Mine is completely sealed so it would not be a good candidate... wonder if that is true of all of them...
--- End quote ---
That would be difficult on some of them, as some of designs reuse parts inside for charging and boost, keeping smaller parts count. For it to work, they should has ups function. You don't really need to open them, just small box with plug and socket on the other side, even you could buy one of the cheapest usb doctors and use it's case for this purpose.
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