BUILD THIS
STEPPER
MOTOR
CONTROLLER

FIGURE 4

by
David
Williams

T

his project allows you to
control the speed, direction, and step size of a
unipolar four-phase stepper motor. Thecontroller
is capable of handling
motor winding currents of up to 1.25
amps per phase and it operates from a
single supply voltage of 6-30 volts DC.
A unique feature of this project is
that thecircuit can operate in either
remote mode or stand-alone mode. In
the stand-alone mode, an on-board
pulse generator and a four-position DIP
switch allows you to demonstrate all of
the functionswithout any additional
connections. This mode is perfect for
demonstrating basic stepper motor

greater than the voltage rating of the
motor for improved performance.
Stable voltage for the restof the
circuit is obtained by regulating the
input voltage down to 5V with U4, a
LM78L05 voltage regulator IC.
Capacitors C7, C1, and C5 provide
additional voltage filtering. U1 is capable ofsupplying up to 100 mA of current.
The heart of the stepper controller
is U1, a UCN5804B stepper-motor
translator/driver IC. It contains a
CMOS logic section for the sequencing
logic and ahigh-voltage bipolar output
section to directly drive a unipolar stepper motor. U1 can generate waveforms
for three different sequence modes: (1)

If you’re interested in robotics, motion control,
or justwant to learn about stepper motors, then
you should try building this versatile stepper
motor controller.
Pin Assignments GND

1

8

Vcc

TRIG

2

7

DISCH

OUT

3

6

THRESHRESET

4

5

CONT

Pin Assignments -

control principles. The circuit even
has LEDs that show the energized
phases for each step.
In remote mode, all motor functions can be interfacedto external
logic or a microcontroller. This
allows the controller to be incorporated
into a robot, an X-Y plotter, or any
motion control project you have in
mind!

CIRCUIT DESCRIPTION [continua]

Leer Ensayo Completo

Cite este ensayo

APA

(2012, 08). Microchip. BuenasTareas.com. Recuperado 08, 2012, de http://www.buenastareas.com/ensayos/Microchip/5108142.html

MLA

"Microchip" BuenasTareas.com. 08 2012. 2012. 08 2012 <http://www.buenastareas.com/ensayos/Microchip/5108142.html>.

MLA 7

"Microchip." BuenasTareas.com. BuenasTareas.com, 08 2012. Web. 08 2012. <http://www.buenastareas.com/ensayos/Microchip/5108142.html>.

CHICAGO

"Microchip." BuenasTareas.com. 08, 2012. consultado el 08, 2012. http://www.buenastareas.com/ensayos/Microchip/5108142.html.