1. I'm sorry that... [ex. I was so rude yesterday] 2. It's my fault. (= I am taking responsibility for the problem) 3. Oops, sorry. (for very small problems) 4. I should have... [ex. called you and told you I'd be late] 5. (formal) I apologize for... [ex. the delay]
The driver controls the motor via pulse width modulation PWM . PWM noise may affect other devices installed in its vicinity. When installing a sensor or microcomputer near the driver power supply, take appropriate noise cancellation measures.