Cytron Technical Forum

there are L293, L293D, L297, L298, how i know which one i need to use?? can introduce one suitable motor driver for me to control Servo motor 360s with maximum speed?? because i want to do speed control in my project

Standard RC servo does not require motor driver.

IC....then how can i do speed control for 3 servo motor 360s if without motor driver. i check the PIC16F877a datasheet, there is only 2 PWM module at RC1 and RC2. how can i do for third motor if without PWM?? because 3 motors need to run in simaltenous way.

Thank you.

What servo motor are you referring? Standard (180 degree) or modified (continuously rotate 360 degree)? If standard motor, maybe you need to get a servo controller such as http://www.cytron.com.my/viewProduct.php?pid=Ly4uGCc9FCskMTMGAi8rJe4NglX6ozDstItiAz5SOrM= to ease your life.
If you are using modified servo motor, then these motors act as normal dc brush motor.You need to use motor driver such as L293D to control it.

IC....then how can i do speed control for 3 servo motor 360s if without motor driver. i check the PIC16F877a datasheet, there is only 2 PWM module at RC1 and RC2. how can i do for third motor if without PWM?? because 3 motors need to run in simaltenous way.

If you used 3 units modified servo (continuously rotate 360 degree), you need 2 units of driver motors (either L293D/L298). Since PIC16F877A only have 2 special pins for PWM (CCP1 & CCP2), you can generate your own PWM by using timer interrupt.

You may not understand between Servo Motor and DC Motor. Servo Motor operates from pulse input (can't rotate 360 degree), DC Motor continoues rotate if voltage supplied. A modified Servo Motor, it's function as DC Motor.

If standard Servo Motor you use, see http://shahrulnizam.com/pic-lesson-servo-motor/
If modified Servo Motor you use, see http://shahrulnizam.com/pic-lesson-dc-motor/

You have 3 motor, PIC only have 2 PWM, you can combine 2 motor with 1 PWM.