Breaking News
View Comments: Newest First | Oldest First | Threaded View
Page 1 / 2   >   >>
Max The Magnificent
User Rank
Author
Re: Bitalino
Max The Magnificent   10/8/2013 11:44:36 AM
NO RATINGS
@David: Years ago Practical Electronics offered a couple of articles on a "Biofeedback" monitor which used feedback form your brain waves  to help you relax (among other things).

I built that when I was a young lad!

rick merritt
User Rank
Author
Plug and play
rick merritt   10/7/2013 1:45:53 AM
NO RATINGS
I like the modularity of the plug and play hardware.

rick merritt
User Rank
Author
Re: Very interesting
rick merritt   10/7/2013 1:44:46 AM
NO RATINGS
@Duane: I like this idea of mass customization. Very practical if it can be reduced to a simple GUI.

Sheetal.Pandey
User Rank
Author
Re: Bitalino
Sheetal.Pandey   10/6/2013 9:39:27 AM
NO RATINGS
Quite interesting. Looks like with this one can do many test themselves without going to healhcare faclities. One day I was walking under sun and felt dizy thought if I can make my own blood pressure mnitoring device.

David Ashton
User Rank
Author
Re: Bitalino
David Ashton   10/5/2013 8:02:05 PM
NO RATINGS
@Garcia - this would only be a hobby project so no certification necessary,

For the electrodes, the PE project used copper or brass disks, covered in lint which they recommend soaking in salt water for conductivity, applied to skin cleaned with shampoo or surgical spirit.   I tried to post a pic but cannot get it to work.   I read somewhere else that nickel-silver coins, with a socket or clip soldered on, are also good electrodes.



 

 

 

Garcia-Lasheras
User Rank
Author
Re: Bitalino
Garcia-Lasheras   10/5/2013 7:21:58 PM
NO RATINGS
@David: "I think ECG and muscle activity signals are of similar amplitudes to brain waves, and pickup techniques are similar"

Yes, you are completly right. About five years ago, a doctor that worked in a local hospital called me in order to evaluate the possibility of creating a start-up company.

He worked on EMG for healing muscular injuries and the signal amplitudes and frequencies were so easy to deal with -- tens of milivolts and KHz range. But the point was that the medical certified cables and sensors were extremely expensive!!

In this way, I think this project is very interesting -- the problem is certification if you want to use it in professional medical products.

By the way... the conductive gel is used in the next way.
  • Apply it over the skin in order to increase conductivity.
  • Then,  you need to scratch the most external skin layer -- but you don't need a flesh wound!!
  • Finally, attach a conductive sensor over the wet scratched skin
  • And you are ready to work!!

I must confess that I did some simple tests by just attaching an oscilloscope to my arm in different points :-)

David Ashton
User Rank
Author
Re: Bitalino
David Ashton   10/5/2013 6:45:09 PM
NO RATINGS
@Garcia...thanks for that....the PE one just used 741s (well this was in 1973!).  If I built it I'd use IAs or at least higher spec opamps, but sounds like the Bitalino could do this sort of stuff quite easily (I think ECG and muscle activity signals are of similar amplitudes to brain waves, and pickup techniques are similar)?

Garcia-Lasheras
User Rank
Author
Re: Bitalino
Garcia-Lasheras   10/5/2013 6:25:20 PM
NO RATINGS
@David: "Years ago Practical Electronics offered a couple of articles on a "Biofeedback" monitor which used feedback form your brain waves  to help you relax (among other things)"

The electronics for building EEG is quite simple indeed: you only need a bunch of instrumentation amplifiers and some conductive gel.

About "Biofeedback", this is still an active technique. A couple of years ago, I was trained for some sessions -- but I soon gave up!!.

In addition, my sister attended to some demos while studying her nursery degree in which some guys handled some computes controls by using monitorized brain waves.

David Ashton
User Rank
Author
Bitalino
David Ashton   10/4/2013 10:59:07 PM
NO RATINGS
Interesting goodie.  Years ago Practical Electronics offered a couple of articles on a "Biofeedback" monitor which used feedback form your brain waves  to help you relax (among other things).  I have the articles but not the time to build the damn thing.   This does not seem to offer any EEG (brain wave) monitoring directly, but I might read more and see if it can do that.  (sigh - there's so much interesting stuff around....)

Duane Benson
User Rank
Author
Re: I could be tempted
Duane Benson   10/4/2013 7:27:18 PM
NO RATINGS
"All I need to start with is a sensor to see where my time goes- then I can look at the others"

Then I'd just need some time optimization routines.

Page 1 / 2   >   >>
Most Recent Comments
michigan0
 
SteveHarris0
 
realjjj
 
SteveHarris0
 
SteveHarris0
 
VicVat
 
Les_Slater
 
SSDWEM
 
witeken
Most Recent Messages
9/25/2016
4:48:30 PM
michigan0 Sang Kim First, 28nm bulk is in volume manufacturing for several years by the major semiconductor companies but not 28nm FDSOI today yet. Why not? Simply because unlike 28nm bulk the LDD(Lightly Doped Drain) to minimize hot carrier generation can't be implemented in 28nm FDSOI. Furthermore, hot carrier reliability becomes worse with scaling, That is the major reason why 28nm FDSOI is not manufacturable today and will not be. Second, how can you suppress the leakage currents from such ultra short 7nm due to the short channel effects? How thin SOI thickness is required to prevent punch-through of un-dopped 7nm FDSOI? Possibly less than 4nm. Depositing such an ultra thin film less then 4nm filum uniformly and reliably over 12" wafers at the manufacturing line is extremely difficult or not even manufacturable. If not manufacturable, the 7nm FDSOI debate is over!Third, what happens when hot carriers are generated near the drain at normal operation of 7nm FDSOI? Electrons go to the positively biased drain with no harm but where the holes to go? The holes can't go to the substrate because of the thin BOX layer. Some holes may become trapped at the BOX layer causing Vt shift. However, the vast majority of holes drift through the the un-dopped SOI channel toward the N+Source,...

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed