UDN2540B is a quad darlington power driver,
manufactured by Allegro. Each output can sink up to 1.8A continuous. The
typical applications include print heads, relays, solenoids, and stepper
motor control. It is a replacement for
In this Dual stepper motor
drivers design we use two UDN2540B to drive two stepping
motors at the same speed. Each motor can be independently controlled. The
S1, S2 switches control the ON/OFF and the moving direction of Motor1. The
S3, S4 control the Motor2, respectively.
is a hex contact bounce eliminator, it uses
to de-bounce the switches and the clock for operation of the chip can also
be used to driver the motor phase generator circuit.
The U2 and U3 (74LS74) generate the necessary clock pulse
to drive the stepper motors, the U4 and U5 (74LS157) select the phase
and direction of the stepper motors.
See Also our low cost
MD-2 Stepper Motor controller board.
All parts in this project can be purchased from us. If you need help or
have any comments on this project, please send it to
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