I was trying to run a SG90 servo using 2 Li-Po 3.7v Batteries connected serially. But it won't work.
When I try to run it using an ESP8266 through vin pin, it works!
why can't it work on 7.14v (3.7v*2).
Note: The Power and GND is only on battery and the Data wire is connected to ESP8266
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