flip9
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- May 17, 2015
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- F770, SG9665GC
I've been toying with the idea of a simple relay and some chopped up USB cables to achieve this effect.
I'm sure someone else MUST have thought of this and tried it, but I haven't seen where.
The idea needs testing. It might be better if the relay coil is fed from the USB port that charges the battery pack instead. It needs to be confirmed if either of the devices can 'back feed' power from their input, which might have the unwanted effect of latching the relay on when it shouldn't be.
I posted about this a while ago. You dont need a relay, a DPDT switch can easily handle it all.
For it to work seamlessly, your powerbank needs to have an auto on/off feature when a device is connected and be able to be charged while in use. I know my Xiaomi powerbank can do it.
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