I'm writing because I had an idea, and I'm trying to move it on. I just want to
know whether you think it is something worthy, or whether I should give up
with the idea. I'm close to get the first prototype, and I shoud make an
investment... that's why I'm trying to figure it out.
So, the idea is as follows: I designed a fully portable system, mainly thought
to be a low power one. It has an LCD screen with backlight, a tactile slider to
navigate the menus, a microSD card to store data, a Bluetooth module to link
to any computer which supports bluetooth, a piezo buzzer for user notification
events, a Li-Ion battery which is charged through the computer, and a USB link.
It also supports the USB suspend mode, so that it also is USB compliant.
The main goal is to offer a digital and portable MODULAR system. What it means
is that this module does nothing without another digital subsystem plugged in it.
I just designed this device with the most common needs for any portable medical
device, and in this way, the subsystem can be much more simple.
Thus, you could just plug a heart rate monitor subsystem to this module, and it
would be working as a heart rate monitor. Just plug an EEG module, and it would
be working as an EEG monitor, or data storage, or whatever you want.
This module provides 4.35V to supply the subsystem, and a UART protocol for
communication. The subsystem should work at 3.3V, since the UART is working
at such voltage.
I already had in mind several subsystems. I would do them in order, from the
easiest to the more difficult one:
1) A magnetic field headset generator. It would be a headset with coils on it, and
once put it on the head, it would generate several magnetic waveforms. It is
easy because it is just a programable current source. The main module just should
send UART commands with the current desired at the coils. In this way, the
magnetic Schumann resonances could be simulated, or applying a single sinusoidal
waveform (let's say at 14Hz), you could increase the EEG amplitude at such a
2) A heart rate monitor. The performance of this subsystem would be analized to move
to the EEG subsystem. The thing is the heart rate is quite easy to measure due to
the high voltage amplitude (well, of course compared with the EEG). Then, in function
of the noise of this acquisition system, I could redesign it or make some
improvements for the EEG monitor.
3) An EEG monitor. Needless to say why use it, you are at this list for something ;)
Of course this module could be used for lots of other projects, even if they are not of
any medical aspect. Just choose a low power microcontroller with UART and working
at 3.3V, and you will be able to use this portable module.
So, what do you think about it? Please, take a look at my website, so that you can get
a better idea about what exactly it is.
If you would like to start designing your own EEG subsystem for this device, just email
me to discuss how, I have several ideas in mind.