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The board have the TB6612 MOSFET drivers with 1.2A per channel current capability (you can draw up to 3A peak for approx 20ms at a time). It also has much lower voltage drops across the motor so you get more torque out of your batteries, and there are built-in flyback diodes as well.
Instead of using a latch and the Arduino's PWM pins, we have a fully-dedicated PWM driver chip onboard. This chip handles all the motor and speed controls over I2C. Only two data pins (SDA & SCL in addition to the power pins GND & 5V) are required to drive the multiple motors, and since it's I2C you can also connect any other I2C devices or shields to the same pins. This also makes it drop-in compatible with any Arduino, such as the Uno, Due, Leonardo and Mega R3.
Key Features
Q: What types of motors can this shield control?
A: It can control 4 DC motors, 2 stepper motors, or 2 servos.
Q: What drivers are used in this shield?
A: It uses TB6612 MOSFET drivers.
Q: How does the shield communicate with Arduino?
A: It communicates via I2C.
Q: What is the current rating per channel?
A: It provides 1.2A per channel continuous current (3A peak).
Q: Does the shield have built-in protection?
A: Yes, it includes built-in protection diodes.
