am using Arduino mega. i want to measure current voltage power consumption of three servo motors simultaneously running. load on each motor is different. will i use any sensors.
Hello sunildp
The market for sensors presents a lot of sensors for current measurement.
Take a view an make a selection to your technical requiements.
Have a nice day and enjoy programming in C++ and learning.
Дайте миру шанс!
Put one current sensor between the servo power supply and the combined servo connections to get the power sum of all servos.
Would you not just use your digital multimeter? 
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