Re: [Openeeg-list] Openeeg-list Digest, Vol 72, Issue 12

[Andrew H. <aho...@rp...>]

Thanks and kudos to Niels Samuels for his very thoughtful and  helpful
response!



You write

That's strange. I've hooked up the device with several laptops and

powering was never an issue.



My laptop is 5 years old. I wonder if that matters.



You write:

You've downloaded this package from FTDI website: CDM20814_WHQL_Certified.zip?.



I have downloaded it but not installed it.



The EEG-SMT Users Manual instructions for installing this driver are as
follows:

2) Go to device manager and locate the group “Other devices” and right
click over the OLIMEX device.

3) Chose update driver software. A dialog will appear and you click “Browse
my computer for driver software”

4) “Let me pick from a list of device

4) “Let me pick from a list of device drivers on my computer”->”Show all
devices”->Next

5) “Have disk”, and browse to the folder where you extracted
CDM20814_WHQL_Certified.zip and locate “ftdibus.inf”

6) Click Next and then “Install software anyway”



My Device Manager (Windows XP, SP3) does not have a group called "Other
Devices", so I could not follow these instructions as given. The EEG-SMT
did install a new virtual serial port on com 11. I tried following these
instructions on that driver. Right click and choose “update” launched the
update wizard. When I pointed the update wizard at the folder containing
“ftdibus.inf” it did not allow me to browse down to an individual file.
Running it on the folder that contained that file resulted in an message,
"The wizard could not find a better match for your hardware than the
software you currently have installed," with options to keep the current
software or browse to a different directory.



Thus I was unable to install it.



I said all this in an email to the Olimex people, but they are still
blaming BioExplorer for the problem. Personally, my opinion is that my
problem is probably right here, with my inability (so far) to update the
virtual serial bus driver.



Niels writes:

Use one with gold plated plugs like this one:

https://www.4u-tech.nl/index.php?item=hq-silver-series-usb-a-b-aansluitkabel-5m&action=article&aid=48986&lang=NL

It made a huge difference in signal quality!



That is extremely helpful. I found appropriate cables on Amazon
immediately.

Does it matter if they have ferrite chokes? I’m guessing not, since RF
interference is well outside the frequency range of EEG waves, though I
suppose you could get harmonics.





I’m going to try and straighten out the driver and cable issues first, but
if that does not help, I will certainly follow your advice about trying
Electric Guru next.



Andrew