MOTOR DRIVER MODULE

Product features:
This module integrated with one internal 5V power supply, meaning when your driving voltage is 7V-35V it makes 5V of energy board power supply logically; when 5V of energy board power on, please not input voltage to +5V power supply in interface but you can lead 5V voltage for external usage
Eg: ENA enable IN1 IN2 to control OUT 1 OUT 2 
ENB enable IN3 IN4 to control OUT 3 OUT 4
Specifications:
Double H bridge Drive Chip: L298N
Logical voltage: 5V
Logical current: 0-36mA
Storage Temperature: -20 to +135
Operating mode: H-bridge driver (dual)
Drive voltage: 5V-35V
Drive current: 2A (MAX single bridge)
Maximum power: 25W
Built-in 5v power supply, when the driving voltage is 7v-35
Usage:
H-Bridge's are typically used in controlling motors speed and direction, but can be used for other projects such as driving the brightness of certain lighting projects such as high powered LED arrays.
How it works:
An H-Bridge is a circuit that can drive a current in either polarity and be controlled by Pulse Width Modulation (PWM).
*Pulse Width Modulation is a means in controlling the duration of an electronic pulse. In motors try to imagine the brush as a water wheel and electrons as a the flowing droplets of water. The voltage would be the water flowing over the wheel at a constant rate, the more water flowing the higher the voltage. Motors are rated at certain voltages and can be damaged if the voltage is applied to heavily or if it is dropped quickly to slow the motor down. Thus PWM. Take the water wheel analogy and think of the water hitting it in pulses but at a constant flow. The longer the pulses the faster the wheel will turn, the shorter the pulses, the slower the water wheel will turn. Motors will last much longer and be more reliable if controlled through PWM.