Is it dangerous to this current (I2) go to the Arduino
I = current flowing out of the stack battery.I1 + I2 = II1 current is just that from the battery through the motor, through the collector/emitter and back to the battery. I1 does not flow through the arduino board.I2 current is just that from the arduino output pin through the base resistor onto the base emitter and back to arduino ground. This current is from whatever voltage source is powering the arduino board.So there is no I (total) = I1 + I2 as they are separate current flows from separate voltage sources.The only place there is a I (total) = I1 + I2 is at the emitter terminal of the transistor.I2 is current going to the Arduino. Is it dangerous to this current (I2) go to the Arduino?
1) Resistance (For I prevent the passage of current through the base => arduino)
2) The passage of current I2 to the plate.