INTERFACING STEPPER MOTOR TO MICROCONTROLLER
CIRCUIT DIAGRAM:
R
IC ULN 2004
µ
P2.0 21
1 16
C O
P2.1 22
8
2 15
0
Y
P2.2 23
5
3 14
1
P2.3 24 G
4 13
Stepper
Motor
1K Ω LED
B
+12
+9v
8 9
(i) V
c
Gnd
c
Port specification:
PORTS INPUT OUTPUT
P 2.0-2.3 Step Sequence
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