What is motor shield?
The Motor Shield is a driver module for motors that allows you to use Arduino to control the working speed and direction of the motor. Based on the Dual Full-Bridge Drive Chip L298, it is able to drive two DC motors or a step motor.
Do I need a motor shield?
You don‘t need this shield to drive servo motors, they have their own controller, you need just a 5V power line, GND and digital output pin to generate a PWM and that’s it. Usually Arduino has enough power to drive servo motors. This shield you are talking about is used for DC (direct current) and stepper motor.
Do you need a motor driver to run a motor?
So mainly, any motor usually needs a driver circuit because its voltage/current requirements are different from the device that’s trying to control it. At a high level, a motor driver takes a “logic-level” input (desired “effort”) and delivers a corresponding “high-side” output to the motor.
How do I know if my motor driver shield is working?
The shield comes with a pulldown resistor array to keep motors switched off during power-up. The on-board LED indicates the motor power supply is Okay. If it is not lit, the motors will not run.
Do you need a motor driver for Arduino?
Driving electromotors needs a high current. … For example, Arduino UNO pins are limited to 40mA of current which is far less than the 100-200mA current necessary to control a small hobby motor. To solve this, we should use a motor driver.