hello firends, i am doing a project in it i use two sources.. one is usb supply and other is 3.7v li-ion rechargable battery....i am using a relay circuit for switching between two sources and the switching circuit i am attaching below.. when i battery is not connected the relay is switching well a…

Relay switching issue between 2 sources

INTP September 14, 2016, 2:26pm 2

You need to explain how your grounds are wired.

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