My Computing System

Whenever my daughter wants something she just says “papa can you get ‘whatever she wants‘ for me in the box”. The box she is referring to is the box in which UPS delivers the goodies and she is asking me to order it online. This gives an idea that how important computer access is for me.

My hands are so weak that it is impossible for me to use a regular keyboard and mouse/trackpad. As a result of this weakness I have to use a switch to access the computer. A switch is small device that sends a signal when activated. There is wide range of switches to choose from, and the one I use is called a bean switch. It just needs a light touch to activate. The switch is connected to a usb device called a switch interface. A switch interface is designed to convert the signal from the switch and send it as a mouse click to the computer. Switch interface can generally emulate key press or a mouse click or a joystick. And again there is a wide range to choose from. I am currently using a switch interface called Swifty.

On the software side I use a scanning program called SwitchXS. SwitchXS is activated when I press the switch and with few presses it allows me to do anything on the computer. I am also using a predictive typing software called KeyStrokes to help with typing. This screen shot will give you an idea about how it works.

The way scanning works is: the first switch press activates SwitchXS which in turn starts scanning a panel. I then press again when the scanning line highlights the row which has the function I want to use. SwitchXS then starts scanning the row and I press again when it highlights the button for the function I want.

To a regular computer user this might sound slow and tiring but the fact is that it is not and with some clever scan panel design I can do things faster and easily. I have designed two scan panels to make my life easier. here is one for general computer use.

This is the one I use for typing.

When time to use a speech program comes, I simply need to add a text to voice software to the mix making my Mac a full-fledged AAC. And in future if my current switch does not work for me any more than all I need to do is get a different type of switch that will work!