I have a bipolar stepper motor with a rating of 1.2A/phase and 3.3 ohms resistance, since this motor will run on a 4v supply is it safe to power this motor via Arduino's Vin? btw I am using a 7293D h-bridge to drive this motor and basing my circuit from a sample four wire bipolar circuit which can be found here. Here are the list of options I just need some advice which one is the best.
Power the motor with an external 4.5v supply connected to pin 8 of L293d. However will that damage Arduino since I'll be powering it from that external 4.5 supply?
Power the motor via Arduino's Vin connected to pin 8 of L293D. Since this is a 5v supply this might damage the motor.
Can I voltage divide that 5v from Arduino's Vin before going to pin 8 of L293D to supply just enough voltage to the motor?
Thanks in advance!