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[FAQ] Driving a Hobby Servo Motor

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We drive all kinds of motors including Brushed, Brushless, and Stepper varieties.

What about Servo Motors?

Yes we are can include those as well. A servo like the one below has three input wires but it is not a brushless motor, it takes 5V, GND, and a single PWM signal. This PWM signal varies it's duty cycle which the Servo uses to tune it's exact output shaft position. This position is fixed for a particular duty cycle.

While our Motor Drive devices are slight overkill for generating a single duty cycle varying PWM (This is usually suited for a 555 timer or an MCU GPIO) the internals of such a Servo can utilize a driver such as the DRV8876 or DRV8874.

EVMs for this purpose can be found here:

http://www.ti.com/tool/drv8876evm

http://www.ti.com/tool/drv8874evm

Regards,

-Adam 


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