SQUARE WAVE GENERATOR FOR STEPPER MOTOR
CN2
R3 470K
VCC + C5 0.1uF
+V GND R1 2.2K
R2 5.6K
1 2 5V-12V DC
4
VCC
8
VCC
7 CN1 D1 LED
10uF/16V C4
PR1 100K
3 GND U1 LM555
C1 0.22uF
6
1 2 PULSE OUT
5
JUMPER FREQ RANGE SET PR1 FREQUENCY ADJ. CN2 SUPPLY IN CN1 SQUARE WAVE OUT
1
2 J1 JUMPER +
C2 0.1uF
C3 2.2uF/16V
PULSE GENERATOR FOR STEPPER MOTOR
13