One of the more dubious advantages of working in a long running Assistive Technology service is access to an ever growing supply of obsolete hardware. While much of it is worthless junk now considering the technological progress in the field over the last 10 years, there are some real gems to be rediscovered. These were innovative solutions of their time grounded in strong research and while being seemingly made obsolete by a newer technology actually still have much to offer. The LOMAK keyboard is certainly one of these and being possibly the only piece of AT on permanent display at New York’s Museum of Modern Art I’m obviously not alone in thinking this.
The LOMAK (Light Operated Mouse And Keyboard) was invented by New Zealander Mike Watling and first came on the market in 2005 after a number of years research. It allowed hands free computer access through the innovative use of a laser pointer and light sensitive keyboard and mouse controls. To make the light sensitive keyboard and mouse (I’ll call it an input device from here) Watling used an array or photoresistors, one for each keyboard, mouse action and setting. This amounted to a whopping 122 photoresistors and possibly the most electronically complex input device ever marketed. Although complex the idea behind the LOMAK is quite straight forward. Photoresistors change their resistance depending on the amount of light they are picking up. Once you figure out roughly how much shining a laser pen on the resistor changes its value you have a good idea of where to set your threshold. You can then use the photo-resistor as a straightforward momentary switch, like a keyboard key, that activates once the resistance goes above/below a certain threshold. If you are like me you will want to see inside this thing so here it is.. (Below), a thing of beauty I’m sure you’ll agree.
So why aren’t more people using LOMAK keyboards today? Well eye tracking technology was just starting to become a realistic possibility for AT users with devices like the Tobii P10 hitting the market. Eye tracking just made more sense for computer access, it allows a neater more mobile solution and it a more direct input method. What has given the whole concept behind the LOMAK a new lease of life is the availability of cheap user-friendly prototyping platforms like Arduino.
This was the basis of one of the project proposals we made available to the final year students of the BSc (Honours) Creative Media Technologies course in IADT. Over the last few years Enable Ireland AT service have worked with IADT lecturer Conor Brennan to provide students with a selection of project briefs that both fit with their learning and skills while also fulfilling a need that has been recognised through our work supporting AT users and professionals in the area. This particular brief was to create a MIDI interface based on the same concept as the LOMAK that would allow someone to perform and compose music using only head movements. There are solutions available that use eye tracking to achieve this, for example the fantastic EyeHarp and more recently Ruud van der Wel of My Breath My Music released his Eye Play Music software. However these solutions all require a computer, we wanted something that was more in keeping with current trends in mainstream electronic music which seems to be moving back to a more hardware based performance. Thankfully a particularly talented student by the name of Rudolf Triebel took on the challenge of designing and building what we are now calling the MILO (Musical Interface using Laser Operation) (previously called LOMI Light Operated MIDI Interface which I think is much better..:). Rudolf exceeded our expectations and created the prototype you can see in the (badly filmed, sorry) video below. He has also created a tutorial including wiring diagram, code and bill of materials and put it up on Instructables to allow the project to be replicated and improved by others.
If you would like to see and maybe have a go of the MILO prototype (in its spanking new laser cut enclosure) Conor Brennan of IADT will be showing and demonstrating it at the 25th EAN Conference which takes place in University College Dublin between Sunday 29th – Tuesday 31st May.
Keep an eye on electroat.com where I hope to add a few more detailed posts on building, modifying and increasing the functionality of Rudolf’s design. I will also look into the possibility of using the same concept for building a hands free video game controller.