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I can’t quite visualize the circuit you are proposing
It should work, however during the current reversal the led will turn off...so a single LED might flicker. In my design one LED is always lit.
I printed this out and what I'm finding is that the top of the round horn for both servos is not long enough to clear the side flanges to allow attachment. Did the author or anyone else have the same issue?
Could you please explain the part of A0, A1 being normal inputs vs pull-ups?
if the GPIO's are capable of ~5V then yes; must look at GPIO Vmax.
Doorbell LEDView Instructable »
Doorbell ButtonView Instructable »