Proper voltage reduction for a motor w/Arduino

[atagger]

I have a mobile phone coin vibration motor that is rated:

DC 3V,0.1ADC 1.5V, 0.05A

What is the best way to reduce the Arduino's 5V down to the 3V for the motor so it won't burn out? A resistor? Transistor?

[Echamberlain]

A resistor would work, but the excess voltage would be converted to heat. The "best" solution is going to depend on the use case. For example, will this system be plugged in or operate on battery power?

[atagger]

A resistor would work, but the excess voltage would be converted to heat. The "best" solution is going to depend on the use case. For example, will this system be plugged in or operate on battery power?

It's using a 9v wall plug, no battery.
Thanks for the help - I was reading in some forums using a resistor is the wrong way to do this.

This is the motor I am trying to power:
https://www.amazon.com/gp/product/B00PZ ... UTF8&psc=1

It's going inside a tube with fish food, so when the motor vibrates the food falls out like a salt shaker.

[adafruit_support_bill]

You can reduce the average voltage to the motor by never running it at full throttle. If you run at maximum speed of about 85 (255 / 3) that will give you an average output voltage of about 3v (9v / 3).

[atagger]

You can reduce the average voltage to the motor by never running it at full throttle. If you run at maximum speed of about 85 (255 / 3) that will give you an average output voltage of about 3v (9v / 3).

Ok, but how would I do this? Analogwrite()?

[adafruit_support_bill]

AnalogWrite on a PWM pin to drive your transistor as shown here:
https://learn.adafruit.com/adafruit-ard ... s/overview