Two questions about USB/DC lipo charger

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pneumatic
 
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Two questions about USB/DC lipo charger

Post by pneumatic »

I have two questions about the "USB/DC LITHIUM POLYMER BATTERY CHARGER 5-12V" PID:280.

1) Is says quite clearly on the silkscreen on the back that "DC Out is not for input!", but perusing the schematic, the only reason I can see for that is that it lacks the input protection diode. If I just want to gang two together, can I just connect them through their DC out pads? I'd still be feeding the two of them through one of the 2.1mm jacks from a 5V/3A source, which should be capable of handing the current that two will draw.

2) I want to connect the two using stand-offs, but the holes in the corners are too small for a standard 4-40 screw. Can I just ream them out a bit? If not, what would you suggest to hold the two boards together?

Thanks,

-- Mitch

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Re: Two questions about USB/DC lipo charger

Post by adafruit_support_bill »

You should be able to gang two of them together as you describe. 5-56 or M2 hardware will fit. Although there is room to ream the holes a bit if you want to use larger hardware.

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