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Simple and inexpensive microcomputer-controllable stepping motor and drive circuit.

D F Marino¹, J D Ingle

¹Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, U.S.A.

|March 1, 1982

Summary

A simple stepper motor and drive circuit was constructed from commercial components for monochromator wavelength scanning. This system allows for controlled scan rate and direction using either a timer or a microcomputer.

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Area of Science:

Optics and Photonics
Electrical Engineering
Instrumentation Science

Background:

Precise wavelength scanning is crucial for spectroscopic analysis.
Existing monochromator drive systems can be complex and expensive.

Purpose of the Study:

To describe the construction of a cost-effective stepper motor drive for monochromator wavelength scanning.
To demonstrate the system's compatibility with different control methods.

Main Methods:

Assembly of a stepper motor and drive circuit using readily available commercial components.
Integration of the stepper motor system with a monochromator for wavelength control.
Implementation of control mechanisms using a hardwired timer and a microcomputer.

Main Results:

Successful construction and operation of a functional stepper motor drive circuit.
Demonstrated ability to control monochromator wavelength with adjustable scan rates and directions.
Verified compatibility with both timer-based and microcomputer-based control systems.

Conclusions:

A simple, economical stepper motor drive system for monochromator wavelength scanning can be built from commercial parts.
The developed system offers flexible control over scan parameters, enhancing its applicability in various spectroscopic setups.