Research into hardware:
EMOTIV are a company that I have been following since 2012 they have designed EPOC which is a BCI (Brain-Computer interface). It has 14 EEG sensors and it wireless. Although after research I was advised to avoid the emotiv-EPOC. The software is ok, but there’ve been a lot of questions about the design, things like the sensors measuring no where near enough resistance for an effective differential amp circuit (a few khom when you need more like 1M ohm), such that they likely get a lot of their input from scalp muscle contractions and not actual brain activity. Cost $799.
Mind wave mobile by NeuroSky is another source of EEG technology, and can also be used with Arduino. This device only has one EEG electrode on the arm which rests on the forehead. Cost £135
Open BCI created their first EEG BCI in 2013 they have made improvements to an already great design, it can now read brain, muscle and heart activity. Open Source BCI video Cost $999.
The brain visualizer app records the brain activity. Data is collected and converted into:
HIGH GAMMA, HIGH ALPHA, HIGH BETA, DELTA, THETA, LOW GAMMA, LOW ALPHA, LOW BETA
To create your own BCI you will need:
shield ekg/emg £19.95
Here I have found a opensource that has listed parts, place of purchase,an cost.
If you would like to build your own EEG pcb board click here
This sketch represents the idea that I use the mindwave mobile and create the interface required for communication via Arduino and Mindwave. For this you will need:
Linking arduino – to mindwave instructions.
This project is very much cost lead as some of these hardware items when pre-assembled are as much as £1500. I have purchased a Mindwave Mobile for £89 and Bluesmirf RN41 £22.18 and will be using 2 Arduino £70 and have managed to get much of the software for free.