Hi Ben,
I have Tourettes and have had an idea to both raise awareness and make money for charity. It also involves an electronic project. I want to make a Tourettes Simulator, the basic idea is to use electrodes like on a Tens/EMS machine to genrate muscle stimulation randomly and added to this would be a speaker to generate vocal tics.
I have set up a Just Giving page for Tourettes Action at https://www.justgiving.com/account/your-pages/J2Tmax
My plan is to challenge the mis-conception that having this syndrome is cool and give friends, family and more the chance to experience some of the difficulties sufferers face like going shopping or to see a movie.
The wearers would become part of my just giving team and would be sponsered to wear the device and record videos of the difficulties they face while doing so.
I have looked into this and my first thoughts were to use a Raspberry Pi, this would give the option of having a web server to upload audio clips to from a mobile and the ability to change the settings to either increase or decrease tic frequency. For the EMS a think the only option is to build a few circuits using a 555 timer. This would allow the tics to be controlled by the 555. I found a scematic here http://www.electroschematics.com/2083/electronic-muscle-stimulator/
After researching I believe we need to be between the 80hz and 120hz range to cause the quick muscle fibres to trigger.
I recorded my initial thoughts on this video https://www.youtube.com/watch?v=JbnXD4JtVsE
My blog is http://j2tmax.co.uk
I hope you can help, I plan to do this project no matter what