how do i locate objects in the sky with my telescope using setting circles?

[micro]

i need to know how to start the setting circles and how to use them

[Carlos_dfc]

First of all you need to polar-align your mount.

Easiest way (assuming you are in the Northern Hemisphere) is to set the telescope in the 'home position on your mount - on a standard equatorial mount that means the scope should be pointed straight forwards (at 90 dec) with the weight rod pointing straight down.
Point the mount as close to North as you can - Now find Polaris (the Pole Star) in the telescope by adjusting ONLY the lattitude and azimuth of the mount head (LEAVE THE DEC AT 90, AND THE WEIGHT ROD POINTING DOWN)
Polaris isn't EXACTLY on the North celestial Pole - but it's near enough for visual purposes - you can refine your polar-alignment later, after you get some experience.
When you centre Polaris, lock off the altitude and azimuth adjustments, and do not move them for the remainder of the observing session.

*Note for Southern Hemisphere polar alignment
In the South, there isn't an obvious South Pole Star - but there is one that's visible in a scope, which is as near to the Sout Pole as Polaris is to the North Pole.
That star is Sigma Octans (magnitude 5,5) - worth looking it up if you are ever gonna need to polar align from the Southern Hemisphere.

To find the object you are looking for, first locate a nearby bright star, and look up it's RA and Dec co-ordinates on a chart.
(I keep a list of about 50 stars - with co-ords - handy for this purpose)
Using RA and DEc only, point the scope at this bright star.
If your polar align is OK - then the Dec setting on your mount, should now match the Dec co-ord for that star.
Now rotate the RA scale, so it also matches the RA co-ord fpr that star.
Your RA circle is now set, and you can use it in conjunction with the Dec scale, to 'hop' to your target.

So - the steps to follow - with a polar aligned mount
Look up co-ords of a nearby star
Point scope at that star
set RA to match that star
Use setting circles to hop to target.

If you have a RA drive motor, laeve it running all the time, this will minimise how often you need to re-calibrate the RA scale.
So long as you keep viewing to one side (East or West) of yor mount, and the RA drive is running - you won't need to re-calibrate - But.......
Imagine a line from the North Pole - through you and your scope - and extending due south to the meridian .
If you switch from viewing one side of the line, to the other (from East to West - or vice-versa) you'll need to re-calibrate on abright star again.
Because of this, If I'm using setting circles, I try to view all my intended targets to one side, before switching over to the other side - so I only have to re-calibrate once during the session.

**Note**
Don't get too hung up on setting circles unless you really need to though.
Now that I've learned my way round the sky, I rarely need them any more, and can nearly always find my target looking through a wide-field eyepiece.
Handy to know how to use them though, just in case.