In my project I need to use 2 servo motor and Arduino. How to power it. One 12v battery is enough to power all? Or should I use different power supply. If so how much volys should I use. Pls share ur opinions
It is. But your RC servos need 5V and the Arduiono (depending on the LDO) needs either 5V or something < 10V. So you'd might need one or voltage regulators. Just don't powert the servos from the arduino 
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