hi all,
below is my driver circuit for controlling motor. the pin1 of optocoupler or 4n25 is connected with my arduino( the arduino giving pwm signal to the optocoupler). the circuit works fine and motor is rotating but not at full speed eventhough i set arduino(microcontroller) to "255" value which the maximum speed". I believe the current is not enough to run the motor at full speed and the motor supply i use is 9V. the motor i m using is motor from a helicopter toy. I could not determine the rated current because i bought the toy helicopter itself thus there is no datasheet on the motor. So member i would to know how can enhance this circuit ? Moreover during hardware implementation, for optocoupler base terminal i didnt connect to ground because when i connected to ground the circuit wont works. Besides that, If i change 4n25 to 4n35, what will happen? TQ**broken link removed**
below is my driver circuit for controlling motor. the pin1 of optocoupler or 4n25 is connected with my arduino( the arduino giving pwm signal to the optocoupler). the circuit works fine and motor is rotating but not at full speed eventhough i set arduino(microcontroller) to "255" value which the maximum speed". I believe the current is not enough to run the motor at full speed and the motor supply i use is 9V. the motor i m using is motor from a helicopter toy. I could not determine the rated current because i bought the toy helicopter itself thus there is no datasheet on the motor. So member i would to know how can enhance this circuit ? Moreover during hardware implementation, for optocoupler base terminal i didnt connect to ground because when i connected to ground the circuit wont works. Besides that, If i change 4n25 to 4n35, what will happen? TQ**broken link removed**