Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: TVA on October 08, 2008, 01:43:14 AM

Title: Need help with servos
Post by: TVA on October 08, 2008, 01:43:14 AM

I have 2 cheap servos that i got from an old RC toy. Problem is that they only have two wires. That means that they are just simple DC motors geared down and unmodified to run 360. I want to use them to drive the wheels of the 50$ robot. What do i have to do to use them?

Title: Re: Need help with servos
Post by: ArcMan on October 08, 2008, 06:32:29 PM

You'll have to drive them with a motor driver then - like the L293D chip.  Check out this site and the internet to learn about them.

Title: Re: Need help with servos
Post by: szhang on October 08, 2008, 11:02:33 PM

you also need to supply a PWM control signal to vary the speed.

Title: Re: Need help with servos
Post by: Admin on October 10, 2008, 05:14:52 AM

This question has been asked a billion times. As such, I added it to the FAQ:
http://www.societyofrobots.com/robot_faq.shtml#servo_vs_motor