Problem with servos

Can anyone help me...:(

my problem is that, i have this tower pro 9g servo and as I connect it to the circuit which I made, It instantly started without putting the PIC microcontroller to its socket. I've already checked the circuit connections and there were no shorted... So, i really don't have an idea now...

Lots of thanks to those who will give help.. :)

when you say it "instantly started"... what do you mean? Did it just twitch? or did it change position?

typically... in order to control a servo you need to supply +5 volts to the red wire, gnd the black wire and supply a PWM (pulse width modulated) signal to the white wire. The pulse must be repeated approx every 20ms (see the article below). So you must use a timing loop, or an interrupt based on a timer, or some other method of making sure you are repeating the pulse at the proper rate. Is your servo Digital or Analog?

Here is a description of how servos work (both digital and analog servos)
http://www.acroname.com/robotics/inf...rvo/servo.html

It is pretty normal for R/C type servos to move as soon as they have power. Usually they just move to the smallest position.

it is digital... I haven't placed the microcontroller yet, still it moves.. Maybe its calibration has its problem.. Thanks for the reply.

Yes, it supposedly work that way, but it moves continuously... Maybe it's calibration has its problem. Thank you for the reply.

I'd suggest you check the wiring again; the color code can be confusing, I've had a servo with brown, red and orange wires! And for certain combination of incorrect wiring, the rotor does stutter.

Regards,

Anand

Thanks for the response