BipolarPCBschB

74194 - BIPOLAR STEPPER MOTOR DRIYER (2008) - CIRCUITBOARD SCHEMATIC - WITH BASIC CONTROLS

©2010 ROB PAISLEY

hUp://home.cogeco.ca/~rpaisley4/Circuitlndex.html

Stepper 09 Sch Disable Main 1 A 24 November, 2010

IC 1 = LM555 TIMER	R1 = 3.3K	R9 = 3.3K
IC 2* = 74LS194 OR 74HC194 - 4 BIT SHIFT REGISTER	R2 = 3.3K	R10 = 3.3K
IC 3 = SN75441 ONE - OUAD HALF-H BRIDGE	R3 = 4700	RT*= IM POTENTIOMETER
IC 4 = LM7S05 - +5 VOLT REGULATOR	R4 = 10K
01,2,3, = 2N3904 OR 2N4400	R5 = 4700	C1 = 1uF/50V
D1 = 3MM LED	R6 = 10K	C2 = 4.7uF/50V
D2= 1N4143	R7 = 10K	C3 = 4.7uF/ 50V
D3 = 1N4001 (*SEE NOTES)	RS = 3.3K	C4 = 470uF/35V

S1 = ON-OFF-ON or

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