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Chapter 4 - Applications
Application Example
The figure below shows an application example that interfaces the M2-Engine to a 6 or 5-wire
unipolar stepper motor. It uses a Darlington transistor array IC (U1: ULN2803) which can handle
up to 1 Amp per winding.
Six Wire Stepping Motor IC Driver
M2-ENGINE
S3
STOP
+5V
RESET
IRQL
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
GND
+5V
XOUT
PWM
CIN
PD7
PD5
SCK
SPDO
SPDI
AD1
AD0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
GND
+9V
GND
RX232
TX232
GND
+12V
S1
LEFT LIMIT
S2
RIGHT LIMIT
6 wire Stepper Motor
U1
ULN2803
1
2
3
4
5
6
7
8
9
R1
10K
In1
In2
In3
In4
In5
In6
In7
In8
G
Out1
Out2
Out3
Out4
Out5
Out6
Out7
Out8
K
Stepper Winding 1
18
17
16
15
14
13
12
11
10
+12V
Max current per winding : 1 Amp. / 30 V DC
C1
100uF/50V
TO THE SERIAL PORT CONNECTOR
#300 - 3665 Kingsway, Vancouver, BC, V5M 5W2, Canada
Phone: 604-299-5173 Fax: 604-299-5174
Page 5 of 11
+
Stepper Winding 2