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Small computer interface to a stepper motorA Commodore VIC-20 computer has been interfaced with a stepper motor to provide an inexpensive stepper motor controller. Only eight transistors and two integrated circuits compose the interface. The software controls the parallel interface of the computer and provides the four phase drive signals for the motor. Optical sensors control the zeroing of the 12-inch turntable positioned by the controller. The computer calculates the position information and movement of the table and may be programmed in BASIC to execute automatic sequences.
Document ID
Document Type
Technical Memorandum (TM)
Berry, Fred A., Jr.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1986
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
NAS 1.15:86574
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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