MOTOR SERVO

The motor stepper often was used for applications that usually really use small torsion, like for the motivator disc the diskette or CD. Motor stepper was the DC motor that did not have the commutator. Generally the motor stepper only had the coil in stator him whereas in his rotor part was the permanent magnet. With the motor model like this then the motor stepper could be arranged by his position in the certain position and proceeded to the side of that was wanted, a direction of the hour needle or was the reverse. The speed of the motor stepper basically was determined by the speed of giving of the data to his commutator. It was increasingly fast that the data that was given then motor stepper will be increasingly fast also the round. Servo the motor was often used as actuator in mobile the robot or the robot's arms. Servo the motor generally him consist of servo continuous and servo the standard. Servo the motor continuous could proceed of 360 levels. Whereas servo the type motor of the standard could only proceed 180 levels. Servo the general motor was used was Continuous Parallax. However if you want to servo the motor that had a big force and fast, ideally your servo HS-311 (continuous) and servo HS-322HD (the standard). For moved the motor servo to right or to left, depended on the value delay that was given by us.

Motor Stepper
Motor Stepper is laboring peripheral elektromekanis by altering pulse elektronis become the mechanical movement of diskrit. motor Stepper make a move pursuant to sequence pulsewhich passed to a motor. In consequence, for the movement of motor stepper needed by controller of motor stepper awakening periodic pulsa-pulsa. use of Motor stepper own some excellence compared to by a ordinary motor DC use. Basically there are 3 type of motor stepper that is
1. Motor of Stepper of type of Variable Relustance ( VR) This Motor is consisted of a soft iron rotor with a few jag and a stator circumference. When stator circumference given by the energi with the current DC, polar - its pole become the termagnetasi. Rotation happened by when tooth - rotor tooth interested of stator. In the following athwart face from motor of stepper of type of Variable Relustance ( VR).
2. Motor of Stepper of type of Permanent Magnet ( PM) Motor Stepper this type of owning rotor which is the in form of like domed can ( tin can) consisted of the coat permanent magnet which certain period the - interlude polarly adversative.With the existence of permanent megnet,hence intensity of magnetic flux in this motor will mount so that can yield the torsi larger ones. Motor this type of usually own the resolution step the (low step) that is between 7,50 till 150 per step or 48 till 24 step of each every its rotation.
3. Motor of Stepper of type Hybird ( HB) Motor of Stepper of type hybird own the structure representing combination from second of previous motor stepper type. motor of Stepper of type hybrid own the tooths of like at motor of type VR as well as owning structured permanent magnet by aksial at its axis bar like motor of type PM. This Type Motor at most used in so many better application becouse the worked motor of Type hybird can yield the high baluster resolution that is between 3,60 till 0,90 per step or 100 - 400 step [of] each;every its rotation.

LCD (Liquid Crytal Display)
LCD represent the appliance to present the better letter from 7 segment because LCD can present the number, alphabet, or other;dissimilar character accessed by using codes ASCII for the data of presented differing from 7 segment using its input that is binary code which not relate to the code ASCII. LCD used by is LCD 16x2 line with the low energy consumption which can present 16 character in a line and have the two row to present the data, to present a data LCD use the dot matrix amounting to 5x7, therefore LCD can present the character in so many form.

KEYPAD in AT89C51

Keypad is a switch group which consist of columns and rows. Keypad have a good characteristic that is a rows and columns can not change.
In process writing and sending data keypad working use 2 method that is method scanning and method polling. Keypad in AT89C51 use scanning method the function is menerima input keypad button and a bring digit or character to instrument a bring such as 7 segment or LCD. Keypad use resistor pull up.