Thanks for the reply,
I put the cube aside for a while as holidays ended for me early Jan.
Buy when I did finally plug back in, came good after a couple of resets.
Thanks again for detailed answer, will be more less trigger happy with power supply from now on oops:
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Hi I am new.to electronics and have done something silly. I tried hooking up an rgb led strip to pulse with cube, but this requires 9v. Normally with arduino this is fine and power gets regulated. So a little smoke came as soon as I connected 9v battery. Disconnected and now won't recognise usb for ...