Category: Control Switches

Computer Interface For Optical Headpointer.

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--- "DO IT YOURSELF" ENTRY ------- PURPOSE: Optical headpointer and photodetector circuit designed to be immune to false triggering. Describes a photodetector circuit tuned to respond only to light pulsed at 90 Hertz (from a headpointer beam), ignoring shifts in ambient light level and room lighting. Circuit output feeds directly into a computer. Includes circuit diagrams for a lamp driver and a photodetector. COMMENTS: For further information contact: G L Heseltine, Science Unlimited Research Foundation, 311-D Spencer Lane, San Antonio, Texas 78201. SKILLS REQUIRED: Electronics. AUTHOR: Ross, L M; ed TITLE: Problem Solving With Rehabilitation Engineering Tech Brief REF: Winter 1983: p 16-19 NARIC CALL NUMBER: 05777 PAGES (including cover): 5 1983.


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