motor driver

FYP Starter Pack, ICs, Voltage Regulator, Resistor, Capacitor......

motor driver

Postby KSW » Wed Sep 15, 2010 12:36 am

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 :)
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Re: motor driver

Postby ober » Wed Sep 15, 2010 9:07 am

Standard RC servo does not require motor driver.
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Re: motor driver

Postby KSW » Wed Sep 15, 2010 10:21 am

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.
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Re: motor driver

Postby hyng » Wed Sep 15, 2010 10:29 am

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.
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Re: motor driver

Postby redips_id » Sat Sep 18, 2010 8:14 pm

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.
Request for complete solution for FYP? Why don't request for graduation certificate?
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Re: motor driver

Postby shahrul » Mon Sep 20, 2010 2:11 pm

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.
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