#define IN1 5 #define IN2 6 #define EN_A 3 // PWM pin for speed (if your MX1616 breaks out ENA) // Note: Some MX1616 modules omit EN pins; then control speed via PWM on both IN pins.
Most MX1616 modules follow a standard 8-pin or SOP16 interface for control and power: + (VM/VCC): External motor power supply (2V–10V). - (GND): Common ground for both power and logic signals. Control Inputs: IN1 / IN2: Controls Motor A direction and speed (PWM). IN3 / IN4: Controls Motor B direction and speed (PWM). Motor Outputs: Mx1616 Motor Driver Datasheet
(The same logic applies to Motor B using IN3 and IN4.) #define IN1 5 #define IN2 6 #define EN_A
The Mx1616 is efficient, but driving 1A+ current through a tiny PCB generates heat. If you are enclosing the driver in a box with no airflow, consider soldering the module to a larger prototype board or adding a small adhesive heatsink if the load is heavy. Control Inputs: IN1 / IN2: Controls Motor A
. It is designed to drive two DC motors or one 4-wire, two-phase stepper motor using internal MOSFET switches to minimize heat generation. STMicroelectronics Technical Specifications