Electronics, PCB Design and PCB Layout Daycounter, Inc.
Engineering Services

Custom Firmware, Electronics Design, and PCB Layout

Electronics Design
Firmware Development
Software Development
Embedded Design
PCB Layout
Digital Signal Processing (DSP)
Reverse Engineering
Device Driver Development
Motor Controllers
Data Acquisition Systems
Palm OS Software
Windows CE Software
Pocket PC Software
Design for Manufacturing
Through Hole to Surface Mount (SMT) Conversion 
Microchip PIC Consultant
MSP430 Development
DSP56 Development
RoHs Redesign
Design for USB

Silver Board Contract Assembly


Stepper Motor Controller Design

Stepper motors are used in applications where precise rotary movement and positioning is critical.  They differ from servo motors in that they can provide precise positioning without the need for feed back.  Stepper motors can be used in simple open-loop systems where they have a static load, at low accelerations. 

Since they are open-loop, stepper motors typically must be initialized upon start up, to a zero position, so that starting position of the motor is known.  If a stepper motor is over-torqued, all knowledge of rotor position can be lost, and the motor must then be reinitialized.

Stepper motors are typically driven with an H-Bridge consisting of 4 MOSFETS, which can switch polarity to the windings of the motor. 

Daycounter specializes in stepper motor controller design.  If you need help with your next electronics design please contact us.


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