Servo Wiring Help

[Schnabel]

Howdy all,
I am using a Hitec HS-322HD servo for a project in my engineering class and was needing a little help with wiring it up. I know that one line is the pulse line (yellow), but I don't know what to do with the other two lines. Do I just hook them up to the source power?
Also, I am running this off of a Stamp II board at 15v (the max rating for the Stamp), will the servo be able to run off of this without burning up, or do I need to use resisters to get the power down?

Thanks for your help!

[ebmonon36]

From the spec sheet:
Voltage Range
All Hitec Servos can be operated within a 4.8V-6V. range.

Wire Color Meanings
On all Hitec servos the Black wire is 'ground', the Red wire ( center ) is 'power' and the
third wire is 'signal'.

Eric

[Steve_Alaniz]

Originally Posted by Schnabel

Howdy all,
I am using a Hitec HS-322HD servo for a project in my engineering class and was needing a little help with wiring it up. I know that one line is the pulse line (yellow), but I don't know what to do with the other two lines. Do I just hook them up to the source power?
Also, I am running this off of a Stamp II board at 15v (the max rating for the Stamp), will the servo be able to run off of this without burning up, or do I need to use resisters to get the power down?

Thanks for your help!

You said a Basic stamp BOARD, did you mean the carrier board? If so, it has an on board 5 V regulator and you can just wire the power supply to the hitec which will give you plenty of power. If not and you are just using a stamp module, you can't use the stamp's on board regulator. It only supplied 50 ma while the hitec requires 150ma (unloaded).
I really suggest you grab a 5v voltage regulator like a 7805, and use that to power the stamp and the hitec. Most regulators are rated at 1 amp Maximum
which is plenty to power. I wouldn't use resistors to create a voltage drop because 7805s are cheap and efficient. You should filter on both the input and outputs of the regulator with .1 uF caps if you like. It adds 3 components to your chip count but really worth it.
Steve