Artificial Language Lab Home | Control Devices
The TAS is a momentary contact switch which can be activated by pressing
any point on its surface.
The entire surface of this switch is sensitive because its top is not
hinged. (Hinged switches have a large unusable surface area near the hinge.)
In addition, this switch has been constructed of heavy aluminum and is very
The TAS switch responds when pressed with both an auditory as well as
a tactile click. This lets the users know that contact has been made. The
switch should be electrically connected through a standard 3.5 mm audio
jack inserted into the side. It should be used only with battery-operated
devices, 5 amps maximum. It is not meant to be used to operate line-powered
devices (household appliances, etc.).
Actuation pressure for the TAS switch is about 40 grams/1.5 oz. Pressure
can be decreased by adjustment of the activation point (see diagram) or
by replacing the Cherry microswitch (#E62-10A) with a more sensitive model
(such as the #E61-10A).
The TAS switch may be mounted to pedestals or other surfaces by using sticky back Velcro or by using the mounting holes arranged in a 11/8" square located on the bottom. These holes are tapped with a 6-32 thread.
Located near the center of the bottom of the switch is a tiny hole with a screwdriver slot. This is an adjustment for setting the switch's activation point. The activating point is the point that the switch turns on as the top is pushed down- an audible click is heard at this point. By setting this point very near the beginning of the travel, the sensitivity is increased. However, if the activation point is set too close to the top, the switch may not turn off when released.
To disassemble the TAS switch, use a screwdrive to remove two screws
form the same side. The switch will open.
The TAS switch was developed with funding from the following: