Typical Application Circuit Diagram - I.C. Top View
The SS03 Serial Switch Input Mouse Controller is compatible with the standard
Microsoft Mouse Drivers or any Drivers that are Microsoft Mouse compatible.
It uses switches to control mouse cursor movement instead of the usual
optical encoder inputs. This makes it easy to use the controller to build
special devices to enable handicapped or disabled people to control their
computer mouse functions. It is also easy to use it to build special mouse
controllers for use in computer applications where a standard mouse would
not work such as industrial environments.
The switch inputs provide: UP, DOWN, LEFT and RIGHT mouse cursor movement
and LEFT BUTTON DOUBLE-CLICK, LEFT BUTTON, RIGHT BUTTON, DRAG-N-DROP and
The cursor movement inputs provide accelerating motion when held
active and also have a single pixel move mode when clicked. This provides for
fine pixel level positioning. The FAST/SLOW input, pin 11, selects a fast or
slow click time, speed and acceleration rate. In FAST the cursor typically
can cross the screen in 3 to 4 seconds. In SLOW its typically 6 to 8 seconds.
The DRAG-N-DROP input effectively locks down the left button for a drag
operation. Activating any button input or the DRAG-N-DROP input a second
time releases the left button and ends the drag operation. The optional LED
(Light Emitting Diode) shown in the DRAG-N-DROP pull-up lights during the
drag and drop operation.
This version Serial Mouse controller currently doesn't support the Wheel
Mouse 3D modes. There is no Z Axis.
The Serial Mouse has a polarity input on pin 12 which selects the polarity of
the serial output on pin 13. This allows using non-inverting or inverting
buffers or no buffer at all. Below is the typical "minimal parts" no buffer
circuit diagram. Note that this circuit may not work with all computers.
This depends on the RS232 buffers used in the PC.
The switches are wired with a common negative (pull down to activate).
External circuitry can also be used in place of switches so the mouse
controller can be controlled by another device (i.e. another
microcontroller, photosensors etc...). Note that the DRAG-N-DROP pin 10 is
both an input and an output. When interfacing pin 10 to external circuitry
there should be no active pull-up. The I.C. is available in a version
without the LED option so pin 10 is always an input and active high
circuitry can used. Otherwise a open collector can be used for interface.
A head mouse can be built with the controller I.C. and some tilt switches.
The price of the Serial Switch Input Mouse Controller I.C. is $20.00.
Quantity pricing is available.