The ASL Adjustable Photo-Electric Sensor with Mono Port, model ASL209_M, is a photo-electric power wheelchair control switch designed for use by individuals with gross motor disabilities or mobility disabilities. This adjustable photo- electric switch can be used on a power wheelchair with ASL proportional driving controls, or for non-driving purposes. It requires the addition of an appropriate ASL 804 power source cable to receive power from the power wheelchair, and can be used with all power
--- "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 F
The Light-Activated Switch is a photoelectric switch designed for use by individuals with physical disabilities. The switch is activated by directing a light pointer at a light-sensitive panel. POWER: 9-volt battery. DIMENSIONS: 4 x 4 x 2 inches.
Photo Cell Switch, model 790 and 790-8, is a photoelectric switch designed to be activated by any body movement for individuals with physical diabilties. The switch is activated by interrupting a light beam and creating a shadow over the electronic photocell.