Stepper motor
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Transcript of Stepper motor
REMOTE CONTROLLING OF STEPPER MOTOR DIRECTION AND SPEED USING MOBILE.
By:E. Arun KumarN. ArchanaV. Swetha
Stepper Motor finds it applications in various areas.
• COMPUTER APPLICATIONS• INDUSTRIAL APPLICATIONS• WIND TURBINES
Block Diagram :
Mobile Phone
Micro Controller(AT89C52
)
L.C.D
D.T.M.F Decode
r
Motor Driver
Stepper Motor 1
Stepper Motor 2
Power Supply
Components :HARDWARE IC 7805 AT89C52 (UC)HT9170b (DTMF DECODER)ULN2803a (MOTOR DRIVER)Stepper MotorL.C.D ( HT44870)SOFTWARE Keil
Micro Controller :8K Bytes of In-System Reprogrammable
Flash MemoryEndurance: 1,000 Write/Erase Cycles Fully Static Operation: 0 Hz to 24 MHz Three-level Program Memory Lock 256 x 8-bit Internal RAM32 Programmable I/O Lines Three 16-bit Timer/CountersEight Interrupt SourcesProgrammable Serial ChannelLow-power Idle and Power-down Modes
Stepper Motor Types :• Unipolar Stepper Motor: Unipolar stepper motors
are characterised by their center-tapped windings.
Bipolar Stepper Motor: Bipolar stepper motors are designed with separate coils.
• Hybrid Stepper Motor : Variable reluctance stepper motor (also called hybrid motors) are characterised by one common lead.
Motor Driver :
• Output current up to 500mA• Output voltage up to 50V• Internal suppression diodes• Eight Darlington with eight emitters• Outputs can be parallelized
DTMF:Dual-tone multi-frequency signaling
(DTMF) is used for telecommunication signallingover analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center.
A DTMF signal is the algebraic sum of two different audio frequencies, and can be expressed as follows:
f(t) = A0sin(2*П*fa*t) + B0sin(2*П*fb*t) + ………..
• The frequencies associated with various keys on the keypad are shown in figure (A).
HT9170b :•Operating voltage: 2.5V~5.5V•Minimal external components•No external filter is required•Low standby current (on power down mode)•Excellent performance
L.C.D :Alpha Numeric L.C.D
with 16 pins.7-14 pins are data pins.L .C.D used is 2x16.
Flow Chart :start
Display Characters on L.C.D
If key presse
d
Stop
Display Corresponding Key on L.C.D rotate
motor depending on key pressed
Conclusion :It finds its application in X-Y Plotter used in industrial
applications.