Stepper Motor


Switchmode Constant Current Source

Operating a stepper motor using a fixed (constant) voltage supply results in poor torque at high speeds. In fact, stepper motors tend to stall at fairly low speeds under such conditions. Several approaches can be used to overcome this problem, one of which is to use a constant current supply in place of the more […]


Stepper Motor Generator Diagram

Stepper motors are a subject that keeps recurring. This little circuit changes a clock signal (from a square wave generator) into signals with a 90-degree phase difference, which are required to drive the stepper motor windings. The price we pay for the simplicity is that the frequency is reduced by a factor of four. This […]


Maximite Stepper Motor Interface

This simple circuit and program listing allows the Maximite microcomputer (SILICON CHIP, March-May 2011) to control a stepper motor. It could be expanded to allow for the control of multiple motors, with four of the Maximite‚Äôs external I/O pins used to control each motor with identical driver circuits. A ULN2003 Darlington transistor array (IC1) switches […]


Stepper Motor Control

A simple, low-cost hardwired step per motor control circuit that can be used in low-power applications, such as moving toys etc is presented here. The circuit comprises a 555 timer IC configured as an astable multivibrator with approx. 1Hz frequency. The frequency is determined from the following relationship: Frequency = 1/T = 1.45/(RA + 2RB)C […]


ULN2003 Control Stepper Motor by Parallel Port

This is an easy to build stepper motor driver that will allow you to precisely control a unipolar stepper motor through your computer’s parallel port. With a stepper motor you can build a lot of interesting gadgets such as robots, elevator, PCB drilling mill, camera panning system, automatic fish feeder, etc. If you have never […]


Stepper Motor Controller Using TDA2030

There are many version of stepper motor type, also the many version of stepper motor controller design. This circuit is a general-purpose stepper motor controller that use IC TDA2030 as the driver. This circuit can be used with a wide range of operating voltages, from approximately 5 V to 18 V. It can drive the […]


Stepper Motor Winding and Wiring Diagram

A stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The sequence of the applied pulses is directly related to the direction of motor shafts […]


L297 Stepper Motor Controller

Four phase drive signals for two phase bipolar and four phase unipolar step motors in microcomputer-controlled application is easily implemented using L29 Stepper Motor Controller IC. We can drive the motor in half step, normal and wave drives mode and switch-mode control of the current in the windings is permuted on chip PWM chopper circuits. […]