- VM: Motor VCC (<15V)
- VCC: Logic VCC (3.3V or 5V)
- PWMA/B: PWM port
- AIN/BIN/AOUT/BOUT: Used to control state of motor
- AO1/AO2/BO1/BO2: Motor output
- STBY: Control on/off of two motors
- There are 6 different MCPWM channels on ESP32, each has 2 outputs A and B. So you can control at most 12 different motors at the same time. In my practice, even 2 outputs on the same channel can be set different speed. But in order to prevent potential problems, you should avoid using 2 motors on the same channel.
- Since two IN pins alone can stop and brake the motor, STBY function is ignored. You should always connect STBY pin to VCC.
On 25GA20E260 motor working under 12V, the speed is about in direct proportion to pwm duty cycle:
