Skip to main content

EEG - Recording brainwaves and pushing them to a live web feed.

Last Tuesday our EEG device arrived. I think I almost exploded with excitement. The device itself is very cheap so we don't expect particularly accurate results but it does work and it proves a concept for us more than anything else.

This is the device http://www.amazon.co.uk/Brainwave-Starter-incl-MindWave-Mobile/dp/B00B1B1H68/ref=sr_1_1?ie=UTF8&qid=1383037186&sr=8-1&keywords=mindwave it's very basic but it does have a decent SDK with it that you can access in a number of ways so you can't complain.

There was a different model that I was interested in that cost around £800.00 for the device but it transpired that they wanted a completely insane amount for the SDK (around 10k) so we left them well alone.

Initially our plan was just to make sure we could get the readings out of the device which involved pinvoking a dll but the documentation was fairly good. We got that up and running after some fuss with the comm ports etc...



Once that was done we made a little site using SignalR. This worked really nicely as you can create a client using the SignalR.Client library that then fed real time information to the SignalR site. This site then pushed the data as a live feed using WebSockets (it falls back to other things like long posting if your browser doesn't support websockets). 

All in all we had the SDK and the live feed up and running in around 2hrs so last Tuesday night was one of our most successful sessions yet!

I think our next plans are to create a nicer looking signalR website to display the waves and release it onto Azure so people can monitor me and then I then I'd like to work out how to hook the device up to mobile devices so I can track the waves on the move. 




Comments

Popular posts from this blog

My home office upgrade wish list.

My home office is almost due an upgrade. I have been holding off until my youngest daughter is out of her cot as then we can finally dispatch the enormous monstrosity of a cot out from the kids bedroom and the drawers that are in my office can be banished giving me better access to my wonderful whiteboard. My other improvements will be purchasing a new, larger monitor. I currently work from a single 22ich Samsung which just doesn't cut it anymore, I did have two at some point but I can't recall what I did with it. I really enjoy using a touch screen so I think I will go for one of these 27inch Hannspree models that I have used before. I put a lot of hours in at home and whilst I have a reasonable chair I still tend to suffer with some back problems, so my next port of call will be to get a Varidesk for home. It works an absolute treat at work and just lets me switch stuff up when I feel like it. they take a reasonable amount of desk space up but I tend to leave my desk fairly

Making your domain less mutable

This happens regularly to me (and from my anecdotal investigation everyone involved in large / old projects). We need a new piece of functionality. I write it, it's beautiful and I win the internet. I have estimated 8 days (or 22.23 lol-points depending on how you live) and it's only taken 4 days. Ah, but then a very small; mostly ignored and very unimportant detail rears it's cruel head. You need to make it work with the code that exists already. This is normally in the form of saving to some pre-existing entities. Oh dear. You save everything through the various management / service classes that exist already and nothing works. So begins the next couple of days of horror. You find that you didn't set the work = true . Most of my woes in this area are caused by modifications at layer further down (or the stored procedure it finally ends up in) changing the object that I was trying to save or not saving part of the object because of some rule. So many errors

Creating star ratings in HTML and Javascript

I'd searched around a little for some shortcuts to help in doing this but I couldn't find anything satisfactory that included the ability to pull the rating off again for saving. I'd ended up coming up with this rather cheeky solution. Hopefully it helps you too! This is my first post in a while (I stopped blogging properly about 8 years ago!) It's strange coming back to it. Blogger feels very crusty and old by todays standards too.